1994 Jeep Grand Cherokee Repair Question
94 Jeep Stalling After Start
Did you disconnect the battery or run it dead?
Thanks for replying. It's not the battery. See, I just found out that if I put one foot on the break and keep one foot on the accelerater, very lightly - I'm able to put the jeep in whatever gear and drive it... But my foot must be on the accelerator at all times... A backyard mech I just called tells me it can be a clogged fuel line, injectors or iac. He said it could also be a cp sensor issue. He assured me it's not the fuel pump, because the jeep wouldn't even start in the first place. But he's kinda shakey at times, I only contact him when I'm on a tight budget. Any advice?
Yup. I can discount all of those things. Other than on the diesel trucks, you will never solve a running or stalling problem on a Chrysler product by replacing the fuel filter. A plugged screen on the pickup tube in the tank is more likely to cause stalling when the largest volume of fuel is pumped, which is during coasting.
There aren't large enough particles in the fuel line to plug it. If multiple injectors were plugged, you'd have a misfire when the engine needs the largest volume of fuel which is under load and accelerating. The engine won't restart if the crankshaft position sensor or camshaft position sensor are bad.
The automatic idle speed motor, (AIS), also called the "idle air control" (IAC) motor could be inoperative but that isn't very common. Besides maintaining idle speed, it also gives you the nice idle "flare-up" to 1500 rpm when you start the engine. If you aren't getting that, the common cause is the battery was disconnected or run dead recently. If so, the Engine Computer lost its memory and has to relearn "minimum throttle" before it will know when it must be in control of idle speed. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.
Ok, you just blew my mind with info! I read your post 3 times. Thank You, Caradiodoc! When I crank my truck I only get about 400-600 rpm. I looked up a video on how to clean an iac, just in case. But I will try the hyw speed test, 1st. And as far as the plugged screen, Is that expensive? Can I unplug it myself? I have a friend that owns an oil shop. I could probably get him to let me use a bay, this evening and pull the tank to try to unplug it. I want to check all of these possible fixes. You're being Very helpful!!!
I'm Just Back To Say, Thanks, Again!!! - In All Actuality, It WAS The IAC... A Very Easy DIY Fix And Only $60... More Than Worth The Price VS How Worse It Could Have Been!!! Thanks For The Impeccable Info, Caradiodoc!!!
Happy to hear it's solved. Did it need to be replaced or cleaned?
Replaced, It was worn and hardened with sludge... almost 20 years of wear...