Rats, I'll have to try that tomorrow. I've already started
her today and after the first laggy start-up she starts
normally.

Seahag

<Matt Osborn> wrote:
> Fuel pump. Try turning the key on without starting for a
> few seconds.
> Then turn the key off and back on to engage the starter.
> If it fires
> right up, then the check valve in the fuel pump is the
> likely culprit.
>
> "Seahag" <Seahag@toadymail.net> wrote:
>
>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>lately.
>>I have to lean on the key maybe twice as long as in the
>>last
>>3 years. A Jeep buddy is having the same problem with his
>>'97 and attributes it to the summer gas additives.
>>Thoughts?
>>
>>Seahag
>>
>
>
>
> -- msosborn at msosborn dot com

 

Rats, I'll have to try that tomorrow. I've already started
her today and after the first laggy start-up she starts
normally.

Seahag

<Matt Osborn> wrote:
> Fuel pump. Try turning the key on without starting for a
> few seconds.
> Then turn the key off and back on to engage the starter.
> If it fires
> right up, then the check valve in the fuel pump is the
> likely culprit.
>
> "Seahag" <Seahag@toadymail.net> wrote:
>
>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>lately.
>>I have to lean on the key maybe twice as long as in the
>>last
>>3 years. A Jeep buddy is having the same problem with his
>>'97 and attributes it to the summer gas additives.
>>Thoughts?
>>
>>Seahag
>>
>
>
>
> -- msosborn at msosborn dot com

 

Rats, I'll have to try that tomorrow. I've already started
her today and after the first laggy start-up she starts
normally.

Seahag

<Matt Osborn> wrote:
> Fuel pump. Try turning the key on without starting for a
> few seconds.
> Then turn the key off and back on to engage the starter.
> If it fires
> right up, then the check valve in the fuel pump is the
> likely culprit.
>
> "Seahag" <Seahag@toadymail.net> wrote:
>
>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>lately.
>>I have to lean on the key maybe twice as long as in the
>>last
>>3 years. A Jeep buddy is having the same problem with his
>>'97 and attributes it to the summer gas additives.
>>Thoughts?
>>
>>Seahag
>>
>
>
>
> -- msosborn at msosborn dot com

 

OK, I did what you said and left the key on until all the
guages came up. Turned the key off and then tried to start
it. I got the same laggy start.

Seahag

"Seahag" <Seahag@toadymail.net> wrote:
> Rats, I'll have to try that tomorrow. I've already
> started her today and after the first laggy start-up she
> starts normally.
>
> Seahag
>
> <Matt Osborn> wrote:
>> Fuel pump. Try turning the key on without starting for a
>> few seconds.
>> Then turn the key off and back on to engage the starter.
>> If it fires
>> right up, then the check valve in the fuel pump is the
>> likely culprit.
>>
>> "Seahag" <Seahag@toadymail.net> wrote:
>>
>>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>>lately.
>>>I have to lean on the key maybe twice as long as in the
>>>last
>>>3 years. A Jeep buddy is having the same problem with
>>>his
>>>'97 and attributes it to the summer gas additives.
>>>Thoughts?
>>>
>>>Seahag
>>>
>>
>>
>>
>> -- msosborn at msosborn dot com
>
>

 

OK, I did what you said and left the key on until all the
guages came up. Turned the key off and then tried to start
it. I got the same laggy start.

Seahag

"Seahag" <Seahag@toadymail.net> wrote:
> Rats, I'll have to try that tomorrow. I've already
> started her today and after the first laggy start-up she
> starts normally.
>
> Seahag
>
> <Matt Osborn> wrote:
>> Fuel pump. Try turning the key on without starting for a
>> few seconds.
>> Then turn the key off and back on to engage the starter.
>> If it fires
>> right up, then the check valve in the fuel pump is the
>> likely culprit.
>>
>> "Seahag" <Seahag@toadymail.net> wrote:
>>
>>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>>lately.
>>>I have to lean on the key maybe twice as long as in the
>>>last
>>>3 years. A Jeep buddy is having the same problem with
>>>his
>>>'97 and attributes it to the summer gas additives.
>>>Thoughts?
>>>
>>>Seahag
>>>
>>
>>
>>
>> -- msosborn at msosborn dot com
>
>

 

OK, I did what you said and left the key on until all the
guages came up. Turned the key off and then tried to start
it. I got the same laggy start.

Seahag

"Seahag" <Seahag@toadymail.net> wrote:
> Rats, I'll have to try that tomorrow. I've already
> started her today and after the first laggy start-up she
> starts normally.
>
> Seahag
>
> <Matt Osborn> wrote:
>> Fuel pump. Try turning the key on without starting for a
>> few seconds.
>> Then turn the key off and back on to engage the starter.
>> If it fires
>> right up, then the check valve in the fuel pump is the
>> likely culprit.
>>
>> "Seahag" <Seahag@toadymail.net> wrote:
>>
>>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>>lately.
>>>I have to lean on the key maybe twice as long as in the
>>>last
>>>3 years. A Jeep buddy is having the same problem with
>>>his
>>>'97 and attributes it to the summer gas additives.
>>>Thoughts?
>>>
>>>Seahag
>>>
>>
>>
>>
>> -- msosborn at msosborn dot com
>
>

 

I find when I clean the connections on the throttle body and the CPS
connections with spray contact cleaner, my 4.0 starts a lot faster.
These are all low power computer signal plugs that can be affected by
the slightest corrosion. They always look clean, but the effect of
cleaning them is dramatic.

My 'new' 87 is now getting checked over slowly but surely by me and it
was revving at 2300 when started most times. A fast spray on what
looked like a clean TPS connection and the next start has it purring at
650 rpm.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Seahag wrote:
>
> OK, I did what you said and left the key on until all the
> guages came up. Turned the key off and then tried to start
> it. I got the same laggy start.
>
> Seahag
>
> "Seahag" <Seahag@toadymail.net> wrote:
> > Rats, I'll have to try that tomorrow. I've already
> > started her today and after the first laggy start-up she
> > starts normally.
> >
> > Seahag
> >
> > <Matt Osborn> wrote:
> >> Fuel pump. Try turning the key on without starting for a
> >> few seconds.
> >> Then turn the key off and back on to engage the starter.
> >> If it fires
> >> right up, then the check valve in the fuel pump is the
> >> likely culprit.
> >>
> >> "Seahag" <Seahag@toadymail.net> wrote:
> >>
> >>>Clemmie ('02 TJ Sport) has been a bit hard to start
> >>>lately.
> >>>I have to lean on the key maybe twice as long as in the
> >>>last
> >>>3 years. A Jeep buddy is having the same problem with
> >>>his
> >>>'97 and attributes it to the summer gas additives.
> >>>Thoughts?
> >>>
> >>>Seahag
> >>>
> >>
> >>
> >>
> >> -- msosborn at msosborn dot com
> >
> >

 

I find when I clean the connections on the throttle body and the CPS
connections with spray contact cleaner, my 4.0 starts a lot faster.
These are all low power computer signal plugs that can be affected by
the slightest corrosion. They always look clean, but the effect of
cleaning them is dramatic.

My 'new' 87 is now getting checked over slowly but surely by me and it
was revving at 2300 when started most times. A fast spray on what
looked like a clean TPS connection and the next start has it purring at
650 rpm.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Seahag wrote:
>
> OK, I did what you said and left the key on until all the
> guages came up. Turned the key off and then tried to start
> it. I got the same laggy start.
>
> Seahag
>
> "Seahag" <Seahag@toadymail.net> wrote:
> > Rats, I'll have to try that tomorrow. I've already
> > started her today and after the first laggy start-up she
> > starts normally.
> >
> > Seahag
> >
> > <Matt Osborn> wrote:
> >> Fuel pump. Try turning the key on without starting for a
> >> few seconds.
> >> Then turn the key off and back on to engage the starter.
> >> If it fires
> >> right up, then the check valve in the fuel pump is the
> >> likely culprit.
> >>
> >> "Seahag" <Seahag@toadymail.net> wrote:
> >>
> >>>Clemmie ('02 TJ Sport) has been a bit hard to start
> >>>lately.
> >>>I have to lean on the key maybe twice as long as in the
> >>>last
> >>>3 years. A Jeep buddy is having the same problem with
> >>>his
> >>>'97 and attributes it to the summer gas additives.
> >>>Thoughts?
> >>>
> >>>Seahag
> >>>
> >>
> >>
> >>
> >> -- msosborn at msosborn dot com
> >
> >

 

I find when I clean the connections on the throttle body and the CPS
connections with spray contact cleaner, my 4.0 starts a lot faster.
These are all low power computer signal plugs that can be affected by
the slightest corrosion. They always look clean, but the effect of
cleaning them is dramatic.

My 'new' 87 is now getting checked over slowly but surely by me and it
was revving at 2300 when started most times. A fast spray on what
looked like a clean TPS connection and the next start has it purring at
650 rpm.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Seahag wrote:
>
> OK, I did what you said and left the key on until all the
> guages came up. Turned the key off and then tried to start
> it. I got the same laggy start.
>
> Seahag
>
> "Seahag" <Seahag@toadymail.net> wrote:
> > Rats, I'll have to try that tomorrow. I've already
> > started her today and after the first laggy start-up she
> > starts normally.
> >
> > Seahag
> >
> > <Matt Osborn> wrote:
> >> Fuel pump. Try turning the key on without starting for a
> >> few seconds.
> >> Then turn the key off and back on to engage the starter.
> >> If it fires
> >> right up, then the check valve in the fuel pump is the
> >> likely culprit.
> >>
> >> "Seahag" <Seahag@toadymail.net> wrote:
> >>
> >>>Clemmie ('02 TJ Sport) has been a bit hard to start
> >>>lately.
> >>>I have to lean on the key maybe twice as long as in the
> >>>last
> >>>3 years. A Jeep buddy is having the same problem with
> >>>his
> >>>'97 and attributes it to the summer gas additives.
> >>>Thoughts?
> >>>
> >>>Seahag
> >>>
> >>
> >>
> >>
> >> -- msosborn at msosborn dot com
> >
> >

 

When the fuel pump check valve goes south, the fuel drains from the
fuel line and the Jeep won't start until the line is refilled. It
takes the fuel pump some time to refill the line, depending on how
completely the fuel line has emptied.

The fuel pump is turned on for a couple of seconds (I'm not sure how
long it runs) when the ignition is turned on. On my Jeep, the problem
became progressively worse. At first, I had to 'run the pump' only
once before it would start. After a month or so, I had to 'run the
pump' two or three times before starting the Jeep.

If you see no improvement in starting by 'running the pump', then it
may not be the fuel pump check valve.


On Thu, 15 Jun 2006 12:12:32 -0400, "Seahag" <Seahag@toadymail.net>
wrote:

>OK, I did what you said and left the key on until all the
>guages came up. Turned the key off and then tried to start
>it. I got the same laggy start.
>
>Seahag
>
>"Seahag" <Seahag@toadymail.net> wrote:
>> Rats, I'll have to try that tomorrow. I've already
>> started her today and after the first laggy start-up she
>> starts normally.
>>
>> Seahag
>>
>> <Matt Osborn> wrote:
>>> Fuel pump. Try turning the key on without starting for a
>>> few seconds.
>>> Then turn the key off and back on to engage the starter.
>>> If it fires
>>> right up, then the check valve in the fuel pump is the
>>> likely culprit.
>>>
>>> "Seahag" <Seahag@toadymail.net> wrote:
>>>
>>>>Clemmie ('02 TJ Sport) has been a bit hard to start
>>>>lately.
>>>>I have to lean on the key maybe twice as long as in the
>>>>last
>>>>3 years. A Jeep buddy is having the same problem with
>>>>his
>>>>'97 and attributes it to the summer gas additives.
>>>>Thoughts?
>>>>
>>>>Seahag
>>>>
>>>
>>>
>>>
>>> -- msosborn at msosborn dot com
>>
>>
>



-- msosborn at msosborn dot com