98 Grand Cherokee..... running rough
by jcjjbart - 8/12/07 8:47 PM
We have a 98 Grand Cherokee Laredo 4.0. The vehicle was just perfect has only 60k miles.
When started cold, or after it sits for about 20 minutes hot, and is restarted, the idle rolls high and low to a point where it almost stalls, which it has a few times. Once it clears up, it runs fine.
If it is started cold, or again hot after sitting, and you attempt to drive, the engine just seems to cut out, and will pop back thru the air-box. It will not completely stall, but loose all power, then run fine.
So far we have done a complete tune up, fuel pump, battery, idle control switch, map sensor, coolant temp sensor, cam sensor, coil, crank sensor. It does not throw any codes, and runs fine after it's little hissy fit.
Any ideas, sugguestions would be greatly appreciated