I bought this jeep and somebody put a motor in it. I just had to finish it up and now i can't get spark. I replaced computer, coil, ignition modular, pick and distributor, and crank tigger but i may not have the right bolts in the crank trigger because it wasn't even on there. The motor was in, but i just had to hook up the wiring which was like jigsaw puzzle. I have one plug hanging underneath that is from the same wiring harness as the oxygen sensor, i can't figure out where it goes. I think it may be a crank trigger problem because i don't know what the bolts are suppose to look like. Is there a way to set the gap or anything? Thank you in advance!!!
Photos are a huge help! Thanks for that link. I've got quite a few possibilities that i'm going to try out tomorrow. All suggestions are so appreciated and i'll be sure to update any progress as soon as i make any =)
Test the CPS output first. Having the incorrect bolts holding it on can cause a weak signal as it may not be close enough to the flexplate/flywheel.
Renix CPS Testing and Adjusting
Renix CPSs have to put out a strong enough signal to the ECU so that it will provide spark.
Most tests for the CPS suggest checking it for an ohms value. This is unreliable and can cause some wasted time and aggravation in your diagnosis of a no-start issue as the CPS will test good when in fact it is bad.
The problem with the ohms test is you can have the correct amount of resistance through the CPS but it isn’t generating enough voltage to trigger the ECU to provide spark.
Unplug the harness connector from the CPS. Using your voltmeter set on AC volts and probing both wires in the connector going to the CPS, crank the engine over. It won’t start with the CPS disconnected.
You should get a reading of .5 AC volts.
If you are down in the .35 AC volts range or lower on your meter reading, you can have intermittent crank/no-start conditions from your Renix Jeep. Some NEW CPSs (from the big box parts stores) have registered only .2 AC volts while reading the proper resistance!! That’s a definite no-start condition. Best to buy your CPS from Napa or the dealer.
Sometimes on a manual transmission equipped Renix Jeep there is an accumulation of debris on the tip of the CPS. It’s worn off clutch material and since the CPS is a magnet, the metal sticks to the tip of the CPS causing a reduced voltage signal. You MAY get by with cleaning the tip of the CPS off.
A little trick for increasing the output of your CPS is to drill out it’s mounting holes with the first drill bit that just won’t fit through the original holes. Then, when mounting it, hold the CPS down as close to the flywheel as you can while tightening the bolts.