Well i got to do a more thorough test drive today. The new IAC fixed the idle problem but the jeep still stalled on me today. Do you guys think CPS is the next best thing to replace?

I dont know how im going to do it if thats the case. I only have one 2 inch extension for my 1/2" drive ratchet and a 5 inch extension for my 3/8". Not enough by everything ive seen so far.

 

Yeah, to replace the CPS, you'll need about two feet of extensions and a "wobble socket." You might try testing your TPS and CPS before replacing them though.

 

TEST IT..............



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

 

Hey cruiser. I did the test like you said but i wasnt getting any voltage display on ac volts. I went through the various settings as well tried dc volts 20 also did resistance check just for the sake of curiosity and if it may help.

http://www.youtube.com/watch?v=TWDdY...ature=youtu.be

I made a video to show you what was happening. Im pretty sure this was the cps connector as like you said it wouldnt start when it was disconnected.

 

It won't start when it's disconnected for testing. Hard to see in the video but the CPS connector has three terminals but only two are used. Wire color is violet with tracer and white with tracer.

 

The connector on the cps is solid red and solid white 3 plugs but only 2 wires. The engine side plug is purple with a stripe and white with a stripe.

 

So to recap here. On the engine side of the harness it seems to match your description cruiser. But the plug side is red and white solids.

Can you confirm if this is the right plug i was testing? The symptoms you described sounded right such as it not starting while the plug was not in. But i could get no voltage reading. Id immagine if the cps was that far gone the jeep wouldnt start at all.

 

Should be the colors I gave you on the harness side also.

 

Crimmy learn to post in the correct location. I'm getting tired of moving every thread you start

 

Sorry odgreen. Wasnt aware i was posting in the wrong place. Shoulda slapped me upside the head sooner! Good lookin out though. You got any input on this? Im pretty damn sure im looking at the right connector here. bleepinjeep did a cps and his was the same. red and black wire on the cps but purple and white on the engine side. Im wondering if perhaps aftermarket ones have different colored wires. but even more so why would i get a zero voltage reading?

 

Alright so i finally took some more time and looked around more. I traced the wire down. The red and white wires do go to the CPS. So we are back to where i was before. My multimeter was picking up no voltage from the CPS. Is it safe to say at this point it has failed or is about to? 193 ohms of resistance as well. Pretty damn high. 19.4 on the continuity check. So what can i take away from this?

 

You are testing with the CPS UNplugged from the harness, right?

 

That is correct cruiser. And i was probing the plug that leads to the cps.

 

Then, according to this, CPS is bad.


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

 

Crimmy, I watched your video and noticed that the only AC settings were 200 and 750 under the HOME title on your meter. The AC output is only around .5 volts which is more than likely too small for that meter. See if you can find a meter with AC 20 or smaller instead of 200 and try the test again.