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Checked the TPS, had .75 closed, 4.5 fully open, smooth and gradual climb on my scope. Just for curiosity's sake, I just checked the CPS with the engine running, and at about 4-5k RPM, the thing was making about 11-12 volts A/C. I think it is normal to do that. I think that I can rule out...

mine will idle, but it seems as if the timing is erratic. If you put a timing light on it, it will go all over the place. The IAT sensor helped, but it still backfires through the intake. I really think that it has something to do with the computer, or the inputs. I am wondering, would the...

I think that you might have the same problem as me. I havent yet figured it out. I think mines a little worse though. Mine will backfire through the intake just like yours, but mine will do it when its cold or warm. Mine also runs mostly better at full throttle. Does yours start and then...

I would allmost have to guess that it is something with the ballast resistor. I would carry a small piece of wire with me if I was you, and when it dies again, wire it across the ballast resistor and see if it runs! The reason I am saying this is that when I was doing a compression test on...

Hmm, I think I found part of the problem. We cought the IAT sensor changing by about 8k ohms. It would go up to about 11k ohms, and then just drop to like 2.5k ohms. Weird, huh? If you hold the throttle steady at about 2k RPM's, the engine would speed up to above 3k RPM's, or maybe just spit...

Ooook, I checked the timing. It was a little off, BUT it still aint right! It runs great at very light throttle, but when it shifts, it pops through the intake. Another thing is that when it starts, the idle flares to about 2k RPM, and then dies. start it again, flares, and dies. On the 3rd...

Well, I found one problem. The Crank position sensor had a tiny little chip on the end of it. Funny thing was that it was giving off a great signal, allmost 1 volt peak to trough on my scope. I checked it on a hunch. Now, with the first problem gone, it has developed a second problem. Im...

Sealing up distributor...do I need a vent? This cherokee uses AMC's computer setup. I have allready checked with the local dealers, and they all say that they can look at it, but that they dont have the computer to tap into it.

I have double checked the timing. I point it to no. 1 cyl when no. 1 cyl is at TDC, computer controls the rest. It wont even run past 1300 RPM's

Transfercase? NP229? I have a problem with my 88 Cherokee. It is backfiring(intake and exhaust). The engine was just rebuilt, and the head is sealing good. I have done a leak down on the engine, and the only place it is leaking past is the rings, and none past the valves. I have checked the...

1060223 I have an 88 Cherokee, and Im having a problem with the Ignition. I have pretty much traced it to the computer. The jeep runs fine on an idle once it starts, but, as soon as you touch the gas, it begins to misfire. I have traced the problem to the Ignition output on the computer...