Stall, What to look for?

1 1/2 months ago I bought an 02 Lib Sport 4x4 w/3.7L. I'm expiencing an engine stall when I come to a complete stop. Usually this happens about 3 miles from my house when its cold outside and the engine is warmed up. Doesn't not stall all the time or even everyday. Maybe 5or 6 times in the time I've owned it. 3 times this week. Other than that the vehicle runs great and has been well cared for. Does any one have any ideas on what direction to go in or what the look for?

Thanks for your help.

Keith

Up Liberty said:

1 1/2 months ago I bought an 02 Lib Sport 4x4 w/3.7L. I'm expiencing an engine stall when I come to a complete stop. Usually this happens about 3 miles from my house when its cold outside and the engine is warmed up. Doesn't not stall all the time or even everyday. Maybe 5or 6 times in the time I've owned it. 3 times this week. Other than that the vehicle runs great and has been well cared for. Does any one have any ideas on what direction to go in or what the look for?

Thanks for your help.

Keith

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Is the check engine light on ?? If so, which codes are coming up ??

If you don't know how to pull the codes (and forgive me if you already know this), here's how: Climb in your vehicle. Put the key in the ignition. Turn the key forward, but don't crank the engine. Now turn it back to off, without taking the key out. Turn the key forward again, without cranking the engine, and back off. Do this a total of three times, and the code will be displayed on your odometer.

If there's no warning light, I'm lost. Every time the hooptie crapped out on me, the check engine light came on.

The hooptie did this to me a few years ago. It was either the crank-sensor or a coil. I'm not sure exactly which, because I changed them all at once.
:cheers:

Check/clean IAC valve.

Moon, the check engine light is not on. Thanks.

Moparman, what is an IAC valve and where is it located? My mechanical skills are somewhat lacking, but can do some simple task with some directions Thanks for any help.

Keith

ok moparman, I did some research and IAC is for Intake Air Control value. I might mention also that there are no other symptoms. Idle and engine run smoothly and idle rpm's seem normal. It just stalls the very instant the vehicle comes to a stop and doesn't do it all the time. Maybe I should follow your instructions and clean it up or replace it.

Up Liberty said:

1 1/2 months ago I bought an 02 Lib Sport 4x4 w/3.7L. I'm expiencing an engine stall when I come to a complete stop. Usually this happens about 3 miles from my house when its cold outside and the engine is warmed up. Doesn't not stall all the time or even everyday. Maybe 5or 6 times in the time I've owned it. 3 times this week. Other than that the vehicle runs great and has been well cared for. Does any one have any ideas on what direction to go in or what the look for?

Thanks for your help.

Keith

Click to expand...

Does it happen at the same spot? Perhaps your fuel pump is on it's way out and certain grades make it act up? Not sure at all...but my sister's Alero wouldn't start at all one day, and it was because fuel wasn't being properly delivered to the engine. But really, that's all just a guess so take that with a grain of salt.

Also thinking of adding a fuel injector cleaner to the next tank full of fuel. Any recomendation on a brand?

Now that it is stalling more frequently, I'm paying closer attention to things like engine idle. Using the tach in the vehicle it's idling at around 630 rpm's while in drive with foot on the brake. Maybe not as smooth as it should be, but not really a rough idle either. And again, it doesn't stall at every stop.

Can someone tell me where the IAC is located at on the 3.7L? Looks like the throttle on the left side and there are 2 plugs on the right side. 1 above the other, is one of them the IAC?

Thanks again everyone for your help.

Keith

How many miles do you have it ??

The fuel pump might be getting ready to take a dump on you.

:cheers:

The big ?


Does your speedo work?

yes the speedo works and the vehicle has 107k.

Up Liberty, I have been having the same problems with my jeep. 2003 jeep liberty sport 3.7l and have no luck with it yet. you can check my thread... all plugs changed, air filter changed, IAC replaced and port for it cleaned, throttle body cleaner, fuel injector cleaner (lucas brand) used, batteries and alternator checked and cleared, seafoam added through a vacuum hose directly into head...still stalls at stops and if it does not stall is will almost die out. idles well, runs well... if you find anything or figure out what the problem is i have been posting all my work on my thread "HELP! Stalls after stopping." hopefully one of us can figure this out for the both of us

Ok a new development. Coming home from work Saturday the Check Engine light came on, also noticed the shifting didn't seem to be normal. When I turned off the OD there was no difference in RPM's. My best guess is something is up with the torque converter or solenoid. Will have the pros check it out tomorrow as I work for a car dealer.

Will post result here.

Any news?

I started this thread just short of a year ago, here is the lastest on my stalling problem. First off let me say when the ambient air temp is above 60 degrees I didn't have a stalling problem,so I didn't worry about a fix thoughout the the summer months.

Last week I took the Liberty to my local Jeep dealer who I know very well from the work I do with my employer. First thing they change out a throttle senser, that was not the issue so they changed it back. Tried several other ideas with no results. While they had the Jeep on the lift doing a lof the tech noticed the transmission pan and gasket had been replaced. On a hunch they pulled the pan back off and the trans filter fell out of its place, bingo!!! Cheap replacement filter and the previous owner who installed it just didn't know what he was doing! Props to the trained professionals

Anyway problem solved. Running great and finally after 1 yr of ownership I can say I'm a happy camper with my Jeep Liberty.

Now on to bigger and better things.

Thanks to everyone hear for their suggestions as well.

Keith

So the cheap ****** filter caused your engine to stop running? Or do you mean something else when you say "stall"?

moparman said:

So the cheap ****** filter caused your engine to stop running? Or do you mean something else when you say "stall"?

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I'd guess the cheap filter impacted trans fluid flow which impacted the torque converter stall speed. TC stall speed stayed too high, therefore stalled the engine.

Bob

To me a high stall speed would be RPMs going up before the vehicle moves like a drag car but I wonder if the opposite was happening, like a lock up.