My '88 cherokee has a few problems, one of the main ones being it misses on acceleration or when the engine is under any type of load. What could this be? It misses on the same cylinder all the time, but normally only when i am accelerating. When it began, i unplugged the ECM, then plugged it back in, and it went away for a while. It came back, and when i unplugged and re-connected the ECM, it was still there. I have to drive it like this to work and such, its the only vehicle i have. I've been through so many different diagnostic procedures with this, i've lost count. All i can really tell you is all cylinders are getting spark, and to the best of my knowledge, fuel. It doesnt seem to have any less power or torque than it did before. Could it be the Crankshaft position sensor? And is it bad to drive it like this? The other problem is, I have one of those oil leaks that seem to come from no where. It loses about a quart per week, and when i look from above, everything looks fine, with the average amount of dirt, and loose oil on top, but when i crawl underneath, its all over the front driveshaft, side of the block behind the exhaust manifold, oil pan, even as far back as the t-case. I'm ready to just ditch the engine, go buy a brand new long block, and use the distributor-less ignition on newer cherokees instead, but i need this to run untill i can get the $$ to do the swap. Thanks guys! Any help I can get is always appreciated, i mean it!
2 Door 4x4
4.0 I6 Automatic Trans
210,000 miles and counting =D
And i actually just replaced the distributor, cap, rotor, and plug wires not too long ago, and began swapping the old equipment back on to make sure it wasnt something related to the new items, and of course, i got nothing from it
im clueless. i jsut know for the longest time i had a flat pedal and i did all sorts of things to improve it and i think ever scince the first day I owned it I actualy had a small crack or leak inbettween cylinders 5 and 6.
didnt use oil idled like crap until i put the MSd box on it, probalby would have ran on for yers longer except i ran some seafoam throguht it and drove the thing about 20 miles in 3rd gear at 4300rpm
Last year of the AMC. Modified
9 inch K&N cone filter and air tube
MSD 6A ignition and SSII blaster coil
improved thermostate houseing and fan relay switch
92 OEM cooling upgrade
4 gauge wiring upgrade
4.6L stroker engine
58mm TB and 1" spacer
and for that extra power an Momo shifter knob
blue wagoneer club member #1
The other thing to check is compression on each cyl. If you've got a leaky valve or ring, it won't fire even with fuel and spark.
Regarding the oil leak, I'm jeep mechanic (yet) but it sounds like a rear main seal to me.