94 Grand Cherokee 5.2L V8. .. Intermittant stalling

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mpdsville1@yahoo.com - 19 Mar 2007 04:27 GMT

Was just given a 1994 Grank Cherokee. V8 5.2 engine.

Every once in a while it sputters out and stalls. Wont start up
right away when it happens, but will eventually fire back up
like nothing happened. This has happened while driving, not
just stalling out a a full stop. The engine is running great and
has no power problems.

Based on daily driving, I'd say it pulls this trick about once every
10-15 days.

Any Advice what I should look for first? Sound familiar to anyone?

Thanks
Mike

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Mike Romain - 19 Mar 2007 15:27 GMT

I would go and open the gas cap right after it dies to see it if then
will start. If so, I would suspect a dirty air filter on the gas tank
vent. I don't know if the GC's can be changed or if they sucker you for
a whole canister for the $2.00 filter.

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/pictures.html?id=2115147590
(More Off Road album links at bottom of the view page)

> Was just given a 1994 Grank Cherokee. V8 5.2 engine.
>
[quoted text clipped - 11 lines]
> Thanks
> Mike

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dansexton@email.com - 19 Mar 2007 23:54 GMT

> I would go and open the gas cap right after it dies to see it if then
> will start. If so, I would suspect a dirty air filter on the gas tank
[quoted text clipped - 26 lines]
>
> - Show quoted text -

I had the same problem with my 1995 Jeep Wrangler. It would run great
and then stall while driving. The check engine light would not come on
and it would start in a few minutes like there was nothing wrong.
After 3 weeks at the Jeep service center and over 70 miles of test
driving by the mechanic they found the Crank Position Senor was
causing the problem. It sends a signal to the computer and tells it
when to fire the plugs. When it stops sending signals the engine
stops. Since it is an interment problem when you re-start the engine
it's sending the signal again and the engine runs fine. After
replacing this sensor I have had no additional problems.

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DougW - 20 Mar 2007 00:21 GMT

dansexton wrote:

> I had the same problem with my 1995 Jeep Wrangler. It would run great
> and then stall while driving. The check engine light would not come on
[quoted text clipped - 6 lines]
> it's sending the signal again and the engine runs fine. After
> replacing this sensor I have had no additional problems.

That CPS sensor has got to be close to the #1 stall/nostart issue.
Wierd thing is, it seldom sets the DTC code for the sensor.

When mine started acting up it would simply up and die when I was
comning to a stop or moving slow. Going fast was no problem but
lower revs made the Jeep feel like it had square wheels.

Signature

DougW

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Mike Romain - 20 Mar 2007 15:01 GMT

>> I would go and open the gas cap right after it dies to see it if then
>> will start. If so, I would suspect a dirty air filter on the gas tank
[quoted text clipped - 32 lines]
> it's sending the signal again and the engine runs fine. After
> replacing this sensor I have had no additional problems.

The CPS issue is a bad connection one. They are computer signal plugs
that are 'very' sensitive to the slightest corrosion. If you just got a
replacement, expect another failure soon. The plug and socket for the
CPS need to be cleaned. You only cleaned half of it with the new part.
Electronic contact cleaner is the best for this. I then use and
recommend some dielectric grease on the plug seal skirts. The TPS also
has this connection issue.

'I' haven't heard of any 5.2L engines like the OP has having this CPS
issue, only the 4.0 engines....

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/pictures.html?id=2115147590
(More Off Road album links at bottom of the view page)

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