cruiser54

Probably oughta test the CPS output. Manual trans? Ever refresh all the engine bay connectors? 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 I suggest unplugging EVERY electrical connection in the engine bay you can find, whether engine related or not, and spraying it out with a good electronics cleaner, visually inspecting the terminals making sure they haven’t retracted into the plastic holder, and then plugging it back together. There’s a critical 10-pin connector for the front lighting system located in front of the air cleaner and behind the left headlight assembly. Don’t miss that one . Also be sure that the connectors to the ballast resistor mounted near the air cleaner housing are clean and tight. ALL of the relays should be removed, the terminals wire-brushed until shiny, and the receptacles sprayed out with contact cleaner. Then plug them back in. I do this on every Renix Jeep I purchase or work on for someone else. Revised 07/23/2012

Have you done the ground refreshing and connector refreshing?

What's the fluid look like? Clean or dirty?

Did the Group 34 Interstate swap today. 700 CCA. Bolts right in. Can't use the bracket from the front stud to the header panel. Who cares.

Top ones are 1.75"

Give it some time. What do you see in the way of sludge when peeking into the oil filer hole?

Some MMO or Restore in the crankcase can easily clean up a lifter.

You do know how to increase the CPS output, right? Perhaps there is carbon buildup in one of the front cylinders. What do your spark plugs look like?

Probably on the right track there. You did the ICU/coil refreshing, right?

Plenty of fuel at the rail? Are the injectors firing fuel into the cylinder? Sooty/wet spark plugs?

Rockers can't be too tight. They're torqued down to zero lash, not adjusted to zero lash.

Good to know. My MJ battery took a dump yesterday. I was wondering if the 34 would bolt right in...

What have you done to it so far? Marvel?

Yeah. Charge the battery.

Test the CPS AV voltage output. 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 Clean the ICM contacts: Renix Jeep ICU/Coil contact refreshing 　 　 The contacts between the coil and the ICU on your Renix Jeep can become corroded and loose causing a complete or intermittent no-start condition. I recommend the following procedure as a maintenance precaution to insure this is eliminated as a possible cause now and in the future. The coil is attached to the ICU by two T20 Torx bolts. Remove these two bolts and lift the coil up off the ICU. You will see 2 pins and 2 sets of contacts. Clean both the pins and springy contact pieces with a good electronics cleaner and some fine sandpaper. Squeeze the springy contacts closer together with some needlenose pliers. Bolt the coil back on to the ICU. While you’re right there, unplug the connectors from the ICU and inspect the pins in the harness connector. Make sure the pins are not retracted into the connector. Spray out the connector and the receptacle of the ICU with the same good electronics cleaner you used earlier. I feel this procedure should be performed at least once in the lifetime of a Renix Jeep. 　 Revised 04-04-2013

Drill that bad boy. Got the instructions?

No "pre-test" on a CPS. Got drill?

.1 is too low. It won't work me sending you the TSB in email. It's TSB 18-51-88

Click on the following link and go to post 7. It's .5 AC volts minimum BTW. http://www.cherokeetech.com/VBull/showthread.php?3070-Cruiser-s-Mostly-Renix-Tips&p=103796#post103796

http://www.amazon.com/Daystar-KJ01010BK-Transmission-Mount-Engine/dp/B003EOX83K

Well, injector goes into the combustion chamber. The lifter is in the crankcase. Best to just chalk this up to coincidence.

A mechanic's stethoscope would be great. http://www.harborfreight.com/mechanics-stethoscope-41966.html

Put a quart of Marvel Mystery Oil into the crankcase and see if it gets better. If you shine a light into the oil filler hole, you can see how much sludge is built up.

Yeah, they did. What about the noise? Louder cold? Getting worse over time? Does it change when you accelerate?

Undo the braided cable at the firewall. Remove all paint form the firewall. Reinstall the cable. Better yet, run an extra one from the firewall to the intake manifold. Stick shift? Maybe there's a buildup of clutch material stuck to the tip of the CPS. Read this: 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