Jeep delayed start - starting problems
09-08-2004, 04:47 PM
#1
Guest
Posts: n/a
Jeep delayed start - starting problems
Over the past 6 months, right after changing my fuel filter, I've
experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
had to crank it several times before it starts, so I thought. I just
assumed that my fuel pump was on the fritz, but maybe not. I noticed
that cranking it over several times is a complete waste of time. What
I must do, is turn the ignition on, without cranking it, and wait for
the check engine light to come one. This usually takes anywhere
between 15-90 seconds. It seems to take less time if I keep turning
the ignition on and off a few times, but really couldn't tell if that
actually helps. When the check engine light comes on, I hear the fuel
pump relay clicking like mad for a few seconds, than the fuel pump
kicks in. After that, it starts right up the way it's supposed to.
BTW, I've cleaned all contacts of fuses and relays, and the box
itself. I tested the relay, and even swapped it out with a good one. I
replaced the CPS and TPS, and cleaned the throttle body and passage to
it, if any of that helps. I'm really confused about this one, so I
hope that someone knows about this and can help me out. Thanks.
experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
had to crank it several times before it starts, so I thought. I just
assumed that my fuel pump was on the fritz, but maybe not. I noticed
that cranking it over several times is a complete waste of time. What
I must do, is turn the ignition on, without cranking it, and wait for
the check engine light to come one. This usually takes anywhere
between 15-90 seconds. It seems to take less time if I keep turning
the ignition on and off a few times, but really couldn't tell if that
actually helps. When the check engine light comes on, I hear the fuel
pump relay clicking like mad for a few seconds, than the fuel pump
kicks in. After that, it starts right up the way it's supposed to.
BTW, I've cleaned all contacts of fuses and relays, and the box
itself. I tested the relay, and even swapped it out with a good one. I
replaced the CPS and TPS, and cleaned the throttle body and passage to
it, if any of that helps. I'm really confused about this one, so I
hope that someone knows about this and can help me out. Thanks.
09-08-2004, 06:01 PM
#2
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
Jesse did pass the time by typing:
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
09-08-2004, 06:01 PM
#3
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
Jesse did pass the time by typing:
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
09-08-2004, 06:01 PM
#4
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
Jesse did pass the time by typing:
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
> Over the past 6 months, right after changing my fuel filter, I've
> experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> had to crank it several times before it starts, so I thought. I just
> assumed that my fuel pump was on the fritz, but maybe not. I noticed
> that cranking it over several times is a complete waste of time. What
> I must do, is turn the ignition on, without cranking it, and wait for
> the check engine light to come one. This usually takes anywhere
> between 15-90 seconds. It seems to take less time if I keep turning
> the ignition on and off a few times, but really couldn't tell if that
> actually helps. When the check engine light comes on, I hear the fuel
> pump relay clicking like mad for a few seconds, than the fuel pump
> kicks in. After that, it starts right up the way it's supposed to.
Ok, first off, are you sure the filter was put in the correct way?
Second, the symtpoms you describe indicate the fuel pump is working but
the system is draining. That could be a few things.
Leak at the filter connection.
Leak at the fuel rail connection.
Pressure regulator may have stopped working.
Injector(s) may be leaking.
The check valve in the pump has gone walkies.
..First check the filter.
With a cold engine!
Then turn the key on then depress the check valve
on the fuel rail. (you will want to have a rag handy)
It should squirt out quite a bit of fuel.
The rest of the tests require a pressure gauge. An old
R-12 is perfect for this job or you can buy a small one
at a local parts store.
--
DougW
09-09-2004, 01:58 AM
#5
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
You have electrical problems. The check engine light should come on immediately
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
09-09-2004, 01:58 AM
#6
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
You have electrical problems. The check engine light should come on immediately
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
09-09-2004, 01:58 AM
#7
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
You have electrical problems. The check engine light should come on immediately
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
when the ignition is turned on.
I'd start by checking for switched power to the computer when the ignition is
turned on.
In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>Over the past 6 months, right after changing my fuel filter, I've
>experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
>had to crank it several times before it starts, so I thought. I just
>assumed that my fuel pump was on the fritz, but maybe not. I noticed
>that cranking it over several times is a complete waste of time. What
>I must do, is turn the ignition on, without cranking it, and wait for
>the check engine light to come one. This usually takes anywhere
>between 15-90 seconds. It seems to take less time if I keep turning
>the ignition on and off a few times, but really couldn't tell if that
>actually helps. When the check engine light comes on, I hear the fuel
>pump relay clicking like mad for a few seconds, than the fuel pump
>kicks in. After that, it starts right up the way it's supposed to.
>
>BTW, I've cleaned all contacts of fuses and relays, and the box
>itself. I tested the relay, and even swapped it out with a good one. I
>replaced the CPS and TPS, and cleaned the throttle body and passage to
>it, if any of that helps. I'm really confused about this one, so I
>hope that someone knows about this and can help me out. Thanks.
10-02-2004, 01:08 PM
#8
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
I figured it out about two weeks ago. It was a bad PCM/ECM. I had to
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
10-02-2004, 01:08 PM
#9
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
I figured it out about two weeks ago. It was a bad PCM/ECM. I had to
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
10-02-2004, 01:08 PM
#10
Guest
Posts: n/a
Re: Jeep delayed start - starting problems
I figured it out about two weeks ago. It was a bad PCM/ECM. I had to
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
wait a while to get a check engine light. At first, the delay was 5-10
seconds, then 10-20 seconds. When it was over a minute that I had to
wait for a check engine light, it became very irritating. Sometimes it
even took 10 minutes. Once the check engine light came on, it fired up
with no problems. From my research, I've found that the PCM energizes
the ASD relay, which was not happening right away. When it was very
quiet, I noticed a high-pitched squeal coming from the PCM. That was
another reason to think it may have been the PCM. I think it was a
leaky capacitor in the PCM, which took a while to store the energy it
needed to energize the relays.
I really had to hunt around the internet for an answer to justify
purchasing a new PCM, as they are very expensive, and incredibly hard
to get a hold of a replacement. Make sure that it definitely is the
PCM before purchasing, otherwise you'll be out about $300-$400 for no
reason.
bllsht <nospam@invaliddot.net> wrote in message news:<fvrvj016mkaf7gcifcfn8erdsaapl07o0c@4ax.com>. ..
> You have electrical problems. The check engine light should come on immediately
> when the ignition is turned on.
>
> I'd start by checking for switched power to the computer when the ignition is
> turned on.
>
> In message <a08c3e3a.0409081247.1f8e433b@posting.google.com >, "Jesse" wrote:
>
> >Over the past 6 months, right after changing my fuel filter, I've
> >experienced starting problems with my 93 Jeep Wrangler 4.0 liter. I
> >had to crank it several times before it starts, so I thought. I just
> >assumed that my fuel pump was on the fritz, but maybe not. I noticed
> >that cranking it over several times is a complete waste of time. What
> >I must do, is turn the ignition on, without cranking it, and wait for
> >the check engine light to come one. This usually takes anywhere
> >between 15-90 seconds. It seems to take less time if I keep turning
> >the ignition on and off a few times, but really couldn't tell if that
> >actually helps. When the check engine light comes on, I hear the fuel
> >pump relay clicking like mad for a few seconds, than the fuel pump
> >kicks in. After that, it starts right up the way it's supposed to.
> >
> >BTW, I've cleaned all contacts of fuses and relays, and the box
> >itself. I tested the relay, and even swapped it out with a good one. I
> >replaced the CPS and TPS, and cleaned the throttle body and passage to
> >it, if any of that helps. I'm really confused about this one, so I
> >hope that someone knows about this and can help me out. Thanks.
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