TajMan

Hehe, I printed out that site and brought it in, got Checker to give me the sensor for $33 total. We shall see...

Friend I got the Jeep from gave me a new multimeter. Thanks for that link, which part is it the $31.79 or $32.79?

I did my best testing the CPS with half-broken volt meter, taped to my windshield facing down so I could test/read it alone. Don't think I get quite 275ohms resistance, or ANY voltage fluctuations while cranking. I'll replace the thing and go from t here, soon enough. $45 for new sensor, I'll probably be trying some junk yard sensors first for min. $

Yeah TCU is easy. Still have no spark. :mad: another thread...

Yes already been there, crank position sensor was disconnected- then I got it plugged in the right spot. Crank position sensor can go bad, but I need a proper line of diagnosis, not just randomly replacing parts until it works.

I got my '87 Comanche Pioneer w/ 4.0 I6 broken, been sitting for 2 years. Person I got if from had driven it 20 miles to his house originally, running on 5 cylinders. (1 pushrod was off & valve spring broken, head was a mess in that cylinder) I finished a head rebuild. Tried starting for 1st time and it wouldn't crank. Cleaned tranny NSS and got it to crank. now I wasn't getting spark Electrical kind of a mess, previous owner bought an 87 Cherokee engine wiring harness on eBay which I had. I ended up swapping out that entire harness, just finished. Cleaned up wiring just a little. Plugged in some unplugged connectors, spliced 1 wire I found melted under the dash and it hasn't melted again with battery connected now. Ok try again. STILL NO SPARK! With the key in ACC position, the yellow wire on the 3-terminal connector on the coil has +12V, like mechanic friend informed me it should. Where can I turn to diagnose now? I've done so much damn work on this thing and have yet to drive it. It only has 113K miles, auto tranny.

Thanks for welcome, I'm a big car guy and member of lots of forums. I'm not gonna pull dash now most likely, engine wiring harness is mostly in engine bay and up to the main ECU is all hooked up now. I just have tranny ECU now to hook up under the dash. I replaced dashes on VW Corrados and 1G Eclipses before, biggest nightmares in the world. Already done a head rebuild and lot of work on the Jeep.

Finally got the damn ECU out. I ended up just having to splice one 3-wire connector by the ECU plugs that was slightly different on the Comanche and Cherokee harnesses. Now I'm over by the tranny ECU. It goes into the firewall on the pasenger's side, where under the dash is that tranny ECU located and plug in? I just found my passenger's side door doesn't open, handle from inside or out it doesn't work. Now how do I need to go about fixing that problem?

What needs to be removed for ECU to drop down so connectors can be unplugged easy? Removing the one 8mm bolt at the bottom of it didn't do anything. I'm trying to swap out engine wiring harness now with one I've got from an 87 Cherokee (I've got an 87 MJ). Wiring is a mess all over the car, and I just found some wires under the dash in the big group running along the driver's side of the car up into the dash which are MELTED. I finally got it to turn over cleaning tranny NSS, I don't have spark is what I'm trying to fix now.