Stalls after exiting highway...

[mattgdawson]

Hey guys - I bought this 2002 Liberty Limited a few months a go and have been having a few issues since. The new one is that after I exit a highway from high speed, and slow down it stalls.

Since having it I have replaced air filter, and spark plugs. I just replaced the radiator last weekend because of a small leak.

And I'm going to do the oil, filter, pcv, oil pressure sensor, and 2 O2 sensors in two weeks - live in an apartment so have to book a diy car bay in advance.

Other things that may be related - takes a while to crank over when cold, and oil pressure light comes when idling after running for a while.

Engine seems to run great otherwise.

Any ideas on the stalling after high speeds? I want to do a fuel and oil pressure tests but can't think of anything else.

Thanks

 

[Hedsic]

Possibly need to send the injectors off to be cleaned/serviced. I would start with the pressure test you mentioned and go from there.

 

[mattgdawson]

Possibly need to send the injectors off to be cleaned/serviced. I would start with the pressure test you mentioned and go from there.

Thanks! Will try to get those done this week. Do injectors typically need to be sent off or would a garage have the equipment?

 

[Hedsic]

I know you can use Seafoam and stuff like that but I think if you need a full actual breakdown servicing/cleaning of them they have to be sent off to a place with the special equipment to do so.

I thought that's what I was going to have to do becasue I had issues where every now and then it would start up and then just die a few second later. after 3 times of doing that it would start just fine. I took it to the dealer and did their little $70 cleaner system where they hook it to a machine and put crap through it and I haven't had an issue since. So I was able to avoid anything further.

The compression test will at least give you a place to start if there happens to be a leak or something going on though.

 

[mattgdawson]

Awesome, thanks.

 

[CactusJacked]

I've tried the Seafoam treatment in the gas tank before, don't waste your time. What does work though is removing the injectors and soaking them in carb cleaner. What works even better is hooking the injector up to a 5v power source with a momentary switch, and flowing cleaner through the injector via a syringe. Very easy and inexpensive diy, and there are plenty of displays on youtube. Don't forget to buy new injector o-rings before you start.

 

[mattgdawson]

Thanks for the tip. I'm dropping it off today to get a fuel pressure test done and maybe a compression test. I'll ask him about the injector clean and see how they do it.

 

[CactusJacked]

I'll ask him about the injector clean and see how they do it.

This connects to the fuel rail without removing the injectors: Mityvac/Fuel injection cleaning kit (MITMV5565) | Fuel Injector Cleaner

Would be quicker to have your mechanic clean the injectors, since he'd have the equipment, as opposed to you removing them. You can weigh over the cost difference (paying him vs a can of carb cleaner, set of o-rings, and your time) to see if it's worth doing it yourself or not.

 

[mattgdawson]

After dropping it off they said they'll run diagnostics but it sounds like cam pos sensor and crank pos sensor. I guess I'll find out, but I would have preferred to do those myself. If he doesn't do the injector clean I think I'll do it myself anyway.

 

[Birdman330]

I've tried the Seafoam treatment in the gas tank before, don't waste your time. What does work though is removing the injectors and soaking them in carb cleaner. What works even better is hooking the injector up to a 5v power source with a momentary switch, and flowing cleaner through the injector via a syringe. Very easy and inexpensive diy, and there are plenty of displays on youtube. Don't forget to buy new injector o-rings before you start.

Only use Seafoam if you have an inline serviceable fuel filter. Seafoam will clean your injectors but it will clean your gas tank at the same time clogging the fuel filter with all the junk it takes off the inside walls of the gas tank.

 

[CactusJacked]

What kind of wall junk would that be, I haven't run into that? I've replaced fuel pumps on vehicles as old as 1991, and the inside of the tank was as clean as a whistle, other than some small bits on the bottom from a deteriorated rubber connector. Just did my 92 Vette last summer, and the tank was like shiny new inside. Gas additives might be fine as preventative medicine, but don't expect it to be a miracle cure.

 

[agb0244]

Replace the cam shaft position and crank shaft position sensors, both are round 30bux