CPS CPS CPS questions help!
01-04-2014, 07:03 PM
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Year: 1999
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CPS CPS CPS questions help!
I after literally having everything replaced in my XJ I had one thing left that was CPS.did that today cleared the light drove it ran great.started again pulled out engine light came out and back to running rough again.my question is it was tight not moving.does it have to be tight to a certain point and placed I also saw an extra hole for a bolt? Does it need to be positioned differently.i have a 96 xj
01-04-2014, 08:43 PM
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Year: 1990
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Did you route the harness so it couldn't burn on the exhaust manifold?
01-04-2014, 10:11 PM
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01-04-2014, 10:15 PM
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[Whoops.
Last edited by cruiser54; 01-04-2014 at 10:40 PM.
01-04-2014, 10:24 PM
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Test it. Only need a cheapo meter. 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 the upper mounting hole to 3/8” from the stock 5/16”, or slot it so the CPS bracket rests on the bell housing when pushed down. Then, when mounting it, hold the CPS down as close to the flywheel as you can while tightening the bolts. Revised 01-26-2013
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01-04-2014, 10:31 PM
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The CPS mounts with 2 bolts, not one.
Make sure it's not on with only one bolt first.
Before doing anything else!!
Make sure it's not on with only one bolt first.
Before doing anything else!!
Last edited by cruiser54; 01-04-2014 at 10:41 PM.
01-04-2014, 10:42 PM
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01-04-2014, 10:46 PM
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2 bolts reason I said other hole there was 3 holes total 2 for where you normally put the bolts but on one said of the side the was a hole above one of them.
01-04-2014, 10:48 PM
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01-04-2014, 10:49 PM
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but I tried moving it and it didn't move at all but may still need to be tightened.pretty sure it's tight though.never had a problem starting it even before replacing only stalled twice and that is it.and it is only rough at idle while driving it's smooth but I believe the se 2 cylinders are misfiring which the fuel injectors were playing everything you can think of has been replaced.cps was that last thing " I thought" that needed replaced then I read about the tps which wasn't replaced yet....
01-04-2014, 10:50 PM
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