79ford302
NAXJA Forum User
- Location
- Paragould, AR
This is going to take a while. I got a 92 cherokee with the 4.0, auto, 4x4. When I bought it a couple months ago it was running bad, i got it on the trailer figureing it had water in the tank and the kids i got it from didn't know how to fix it. Dropped the tank, no water but i drained it anyways, fresh gas, new filter, plugs, cap, rotor, the works. Fired it up still rough idle, popping through the intake, backfiring on occasion. Hold it to the floor and it doesn't want to take gas, popping and snapping gets worse. It was flooding out pretty bad at this point. Changed coolant sensor, O2 sensor, and plugs again. Still running rough, not driveable. Fixed a couple of vacuum leaks I had overlooked one day and it started running like a top. Got it in the shop fixing some odds and ends to take it on a wheeling trip, started running like junk again after a few days. Unhooked the battery and still about the same. Figured out on friday night before my trip that if I got it good and hot, shut it off for a few minutes it then would run good for a while. Unloaded it off the trailer at the off road park the next day running like crap, I let it sit and idle for a while. Floored it a few times, then shut it off and let it sit a few minutes. Started it back it ran great for about 3-4 hours out on the trail, stopping and chilling a few times along the way. Got ready to head to the trailer almost couldn't get it to climb the ramps. I unloaded it at the house and haven't been able to get it to clear up and run right since. It won't even climb the hill to get in the shop. Plugs were black again, changed them, still the same. Don't really want to throw a bunch of parts at this thing, but i want it fixed or gone.
Cliff Notes: Really rough, low idle, backfires when revving the motor, pops in the intake, not driveable when running bad, won't take gas, sometimes it runs like brand new, most of the time not. Fuel Pressure is about 43psi with the vacuum line unhooked from the regulator.
New Parts: Plugs, Cap and Rotor, Coolant Sensor, O2 Sensor, Fuel Filter, Drained tank, Fresh Gas,
Cliff Notes: Really rough, low idle, backfires when revving the motor, pops in the intake, not driveable when running bad, won't take gas, sometimes it runs like brand new, most of the time not. Fuel Pressure is about 43psi with the vacuum line unhooked from the regulator.
New Parts: Plugs, Cap and Rotor, Coolant Sensor, O2 Sensor, Fuel Filter, Drained tank, Fresh Gas,