Re: 97 Jeep Cherokee - No Spark
 

Let's try something simple and free. Just reseat the plug for the CPS! A
dirty connection will keep it from working. It's round and is on the left
rear of the engine. One end disappears down to the bellhousing area.

JoBo


<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
>I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>

Re: 97 Jeep Cherokee - No Spark
 

Let's try something simple and free. Just reseat the plug for the CPS! A
dirty connection will keep it from working. It's round and is on the left
rear of the engine. One end disappears down to the bellhousing area.

JoBo


<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
>I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>

Re: 97 Jeep Cherokee - No Spark
 

Let's try something simple and free. Just reseat the plug for the CPS! A
dirty connection will keep it from working. It's round and is on the left
rear of the engine. One end disappears down to the bellhousing area.

JoBo


<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
>I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>

Re: 97 Jeep Cherokee - No Spark
 

Some Jeeps are read from their trip odometer, clear it first.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<bob.turner@clix.pt> wrote in message
news:1169110973.858341.114300@51g2000cwl.googlegro ups.com...
> Hi
>
> thanks for the responses, I have tried the on-off-on-off-on, and
> on-off-on-off-on-off-on, both within five seconds, and also by waiting
> for the odometer to light at each on. Still no codes.
>
> Unfortunately I am 2 hours from a dealer in the back of beyond, and no
> faith in local shops. Can anyone help with an OEM part No. for both the
> crank and cam postion sensor, as I will order both parts.
>
> thanks

Re: 97 Jeep Cherokee - No Spark
 

Some Jeeps are read from their trip odometer, clear it first.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<bob.turner@clix.pt> wrote in message
news:1169110973.858341.114300@51g2000cwl.googlegro ups.com...
> Hi
>
> thanks for the responses, I have tried the on-off-on-off-on, and
> on-off-on-off-on-off-on, both within five seconds, and also by waiting
> for the odometer to light at each on. Still no codes.
>
> Unfortunately I am 2 hours from a dealer in the back of beyond, and no
> faith in local shops. Can anyone help with an OEM part No. for both the
> crank and cam postion sensor, as I will order both parts.
>
> thanks

Re: 97 Jeep Cherokee - No Spark
 

Some Jeeps are read from their trip odometer, clear it first.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<bob.turner@clix.pt> wrote in message
news:1169110973.858341.114300@51g2000cwl.googlegro ups.com...
> Hi
>
> thanks for the responses, I have tried the on-off-on-off-on, and
> on-off-on-off-on-off-on, both within five seconds, and also by waiting
> for the odometer to light at each on. Still no codes.
>
> Unfortunately I am 2 hours from a dealer in the back of beyond, and no
> faith in local shops. Can anyone help with an OEM part No. for both the
> crank and cam postion sensor, as I will order both parts.
>
> thanks

Re: 97 Jeep Cherokee - No Spark
 

Some Jeeps are read from their trip odometer, clear it first.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/

<bob.turner@clix.pt> wrote in message
news:1169110973.858341.114300@51g2000cwl.googlegro ups.com...
> Hi
>
> thanks for the responses, I have tried the on-off-on-off-on, and
> on-off-on-off-on-off-on, both within five seconds, and also by waiting
> for the odometer to light at each on. Still no codes.
>
> Unfortunately I am 2 hours from a dealer in the back of beyond, and no
> faith in local shops. Can anyone help with an OEM part No. for both the
> crank and cam postion sensor, as I will order both parts.
>
> thanks

Re: 97 Jeep Cherokee - No Spark
 

you ran a selftest on the cluster and did not comm with the pcm
you need to turn key on and off 3 times then look at the odometer for the
p code and if there is a no buss message then replace the crank sensor
also look at the coil and wire

bob.turner@clix.pt wrote:

> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner

Re: 97 Jeep Cherokee - No Spark
 

you ran a selftest on the cluster and did not comm with the pcm
you need to turn key on and off 3 times then look at the odometer for the
p code and if there is a no buss message then replace the crank sensor
also look at the coil and wire

bob.turner@clix.pt wrote:

> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner

Re: 97 Jeep Cherokee - No Spark
 

you ran a selftest on the cluster and did not comm with the pcm
you need to turn key on and off 3 times then look at the odometer for the
p code and if there is a no buss message then replace the crank sensor
also look at the coil and wire

bob.turner@clix.pt wrote:

> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner