1995 Jeep Grand Cherokee Laredo. Plz Help tried everything!
by c7klown - 9/2/11 9:08 PM
1995 Jeep Grand cherokee Laredo 4.0 liter strait 6 motor.
Ok, see if someone can figure this out because everyone I know is stumped. I've asked a few mechanics and parts store personal and no one knows.
First I need to explain the problem. After driving for so long, say 25-30 miles, it starts to act up as if it was running out of fuel. Backfiring, cutting out, loss of horse power ect... It does it whether you try giving it a little gas or the whole petal. But it only does it after being driven for awhile and its hot outside. When the temperature outside cools off and during the winter it doesn't act up at all. When it's not acting up it runs great and no problems. Sometimes I can put it in neutral and turn key off and back on and it fixes for a short time. Other times I have to actually pull over and turn the jeep off and let it sit for approx 10 mins and it's back to normal again for a short time. It's not showing any warning lights inside of any kind. There are no vacuum leaks that have been found after several times looking and listening. My theory is something is getting too hot I just can't figure out what. If someone could please help me I would for ever be grateful.
This is a list of things I have tried so far:
Pick up coil
Fuel pump relay
Crank shaft position sensor
The air filter is new as well and gets regular oil changes.Also I have tried cleaning intake and has had prob. 6-8 bottles of either Seafoam or Lucas fuel treatment since problem began.