Engine Performance problem
1999 Jeep Cherokee 6 cyl Four Wheel Drive Automatic 161000 miles
My 1999 Cherokee 4.0L inline six 4wd has been sputtering when not at operating temperature and is always touch and go when starting. It used to start fine and when I would put the vehicle in drive and as I began to accelerate it would sputter and almost stall. I would get up to highway speeds and have no problems. The things I have already done to it in an attempt to fix the problem are: replaced battery, replaced TPS, cleaned TB and part of IAC, replaced air filter, changed the oil, sea foamed fuel system, checked recently replaced spark plugs, wires and distributor cap (and rotor). Oil gauge has been reading at 80 for a while now and I am in the process of replacing Oil Pressure Sending unit, tested fuel pressure at ~47psi (fuel pump is priming), Also replaced Crankshaft Position Sensor.
It ran fine this morning (highway ~40 mins), when I tried to return home it sputtered, surged, and died on me several times (speedometer bouncing around the entire time) when tying to accelerate, It idled perfectly (it always does). It sputtered all the way up to about 60mph and then after a while it began to run less rough (speedometer functioning normal). When exiting the highway and coming to a complete stop, then again accelerating it seem to run smooth for the 2 or 3 miles to my home. Please Help!
have the same problem?
Tuesday, November 4th, 2008 AT 12:00 PM