Comanchie Mike Posted July 29, 2012 Share Posted July 29, 2012 I have a 88 comanchie 4.0 I have this weird starting problem. Sometimes it starts and stays runnning, but the if I shut it off it's like shooting craps hoping it will start? It will jut crank & crank but won't catch. Any Ideas? Thank You :???: Link to comment Share on other sites More sharing options...
cruiser54 Posted July 30, 2012 Share Posted July 30, 2012 Use the following instructions and check the CPS: 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. Revised 11-29-2011 Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 30, 2012 Share Posted July 30, 2012 What's a Comanchie? Have not seen that one before. Might be a good idea to spell it right on your first post, si? Link to comment Share on other sites More sharing options...
cruiser54 Posted July 31, 2012 Share Posted July 31, 2012 What's a Comanchie? Have not seen that one before. Might be a good idea to spell it right on your first post, si? Comanchie Miguel: Comanchies are generally pink and have frills around the fender openings. Seriously though, check your CPS. Link to comment Share on other sites More sharing options...
Comanchie Mike Posted July 31, 2012 Author Share Posted July 31, 2012 What's a Comanchie? Have not seen that one before. Might be a good idea to spell it right on your first post, si? Comanchie Miguel: Comanchies are generally pink and have frills around the fender openings. Seriously though, check your CPS. Thank You, Comanche was a typo, you were right it was the CPS. Thank You Again Mike :cheers: Link to comment Share on other sites More sharing options...
cruiser54 Posted July 31, 2012 Share Posted July 31, 2012 This is great. We got to poke fun at you AND help you fix your Jeep. Welcome to Comanche Club. Link to comment Share on other sites More sharing options...
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