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88 no start problem.

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Old 11-27-2014, 01:06 AM
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Yeah i havent repalced that yet. Kind of expensive but im thinking either it or a coolant temp sensor. Maybe thats a big deal. Not sure though. Anyone know where i could download a renix repair manual? It would be a big help.
Old 11-27-2014, 01:09 AM
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Ok cool thanks man.
Old 11-27-2014, 01:10 AM
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Dont think sensor will keep it from starting .
Old 11-27-2014, 01:12 AM
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look here ....http://www.lunghd.com/Tech_Index.htm
Old 11-27-2014, 07:12 AM
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Originally Posted by trovilcl
So just wondering but does everyone give up on helping people? I let this thread go for almost 2 weeks to see if anyone would help but its upsetting seeing that no one replied or even tried to give any advice to someone suffering. I tell ya this Renix system is tough but i dont plan on giving up. The sages of this website whom have so much respect have given me great info and a world of information, however it hasnt helped. My jeep still sits to this day in my garage due to my inability to diagnose the problems. I have replaced several hundred dollars worth of parts on this thing and unfortunatly do not have much more money to sink into it. Please if anyone has any information i would be very grateful for it. Cause as for right now its seems i have done everything i can to fix this dang jeep. But right now the Renix is winning.


Your last post on November 16th says :"Ok thanks man ill check it out". It's up to you to update the forum on what you've found out by "checking things out". You haven't posted anything so the assumption is you have done anything new. We don't have spider-sense that tells us to put a note in our diary that "Hmm, check with trovilcl-see how he's doing".. This works by updates, which sends alerts to people who have subscribed when new posts are made-there's no reminders and there's dozen of other posts that people are helping others out with too.


You have to take responsibility for what you can do on your end. When you post "Anyone know where I can download a Renix manual" that tells people you haven't bothered to do a simple search either of the forum or just google even. I just typed in "Renix manual" into google and got 440,000 hits most of which are links to download a manual. That doesn't inspire confidence.
Sorry to be blunt but I don't like when people bash the forum. These forums are free and godsends for people who do their own work.
Old 11-27-2014, 08:29 AM
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Your right.
Old 11-27-2014, 08:33 AM
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It might be time to take your Jeep to a professional mechanic and pay them to diagnose/fix your issue. It has been 2+ weeks and no go yet, even with the all the help from the forum.

Know when to hold 'em. Know when to fold 'em. Know when to walk away...
Old 11-27-2014, 08:34 AM
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Originally Posted by trovilcl
Your right.
Of my Tips, which have you completed?
Old 11-27-2014, 08:36 AM
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Originally Posted by Crazy 8s
It might be time to take your Jeep to a professional mechanic and pay them to diagnose/fix your issue. It has been 2+ weeks and no go yet, even with the all the help from the forum.

Know when to hold 'em. Know when to fold 'em. Know when to walk away...
Know when to run..........
Old 11-27-2014, 09:27 AM
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Ok so of your tips i have completed

Ground Refresh- clean to bare metal stud is good.
C101 elimination
Electrical connection refresh.
CPS changed and drilled out to 3/8ths hole.
Coil ICM contacts refresh/ new coil.
Sensor ground upgrade
Throttle body cleaning

And then of course all the parts i put into it.
New CPS, Coil, Cap, Rotor, Plugs/ wires, New battery cables, new fuel filter.

The CPS is sending .38VAC when i crank it over, where as my last one was sending like .15 VAC. Thats with being drilled out and evrerything. I havent had a chance today to check but im gonna see if im recieving voltage to the coil through the ICM. And then take it somewhere to have it checked. I dont remember where i i read those can suffer from like a thermal breakdown of internal components? With it setting for 2 or 3 years without being started u think that could effect the ICM?
Old 11-27-2014, 09:31 AM
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Originally Posted by Crazy 8s
It might be time to take your Jeep to a professional mechanic and pay them to diagnose/fix your issue. It has been 2+ weeks and no go yet, even with the all the help from the forum.
Sorry dude but i have to do this myself. For two reasons first i cant afford to send it to a mechanic. And second its a personal vendetta for me to fix this dang thing and figure out the Renix system. I worked on a 7 billion dollar vehicle for four years and kept it going, i aint giving up on a $300 jeep.
Old 11-27-2014, 09:51 AM
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Did you state that the jeep hasn't been running for 2-3 years? It is possible that sediment from the fuel tank or rotted stuff in the fuel lines has clogged your fuel injectors. On my first car, I accidentally put regular fuel into it when it was an unleaded car and then put 180 miles on it. The next day it wouldn't start because the fuel injectors were clogged up. I knew little of cars at that time and that mistake cost me 700 bucks.

Your starter cranks. Good. Check for spark. If you've got spark...good. The next thing you need is fuel being sprayed into the intake. You can test that voltage is reaching the injectors, but that doesn't tell you if the injector is spraying.

Check that something hasn't crawled up the exhaust pipe and died; like a potato or a rat or your ex-girlfriend...

Check that something hasn't crawled into your intake hose; a Furby, a Tribble, a bowling ball...
Old 11-27-2014, 10:23 AM
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Back to basics, to start, you need compression, fuel and spark. Based on your posts, I assume you have no spark at the plugs, also since you replaced the coil, no spark at the coil. Do you have a spark at the coil?
The coil is mounted in a connection, has all the contacts in the coil mount connection been cleaned?
Do you have voltage to the coil mount?

For the future, it is best to test a part before replacing, so as not to waste money replacing parts that are working.
Old 11-27-2014, 06:50 PM
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Originally Posted by 87xjDave
Back to basics, to start, you need compression, fuel and spark. Based on your posts, I assume you have no spark at the plugs, also since you replaced the coil, no spark at the coil. Do you have a spark at the coil?
The coil is mounted in a connection, has all the contacts in the coil mount connection been cleaned?
Do you have voltage to the coil mount?

For the future, it is best to test a part before replacing, so as not to waste money replacing parts that are working.


X2 on this. I would put the old coil back and see what happens or try another one (from Junk Yard). If there's no spark at the distributor, and there's voltage at the ICM, I would think bad coil or bad ICM. They should be cheap at a junkyard.


Also, just to humour us, unplug all the connectors at the ICM, spray with contact cleaner. Unplug the CPS connector, spray with contact cleaner. Remove coil wire to distributor and see if there is a good contact inside the boots on both ends. Clean connection on coil.


When it's cranking, how fast is it turning over? Is your battery fairly new?

Last edited by 67 GMC; 11-27-2014 at 07:03 PM.
Old 11-27-2014, 09:59 PM
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Alright lets try to answer all the questions.

Crazy8's: Ok so when i first got the jeep it started right up after i threw a brand new battery in it. I actually drove it home. I went to replace the spark plugs and it wouldnt start again. I was having the typical somtimes start from a starting to go bad CPS. Then it wouldnt start after that. So thats when i created this thread. The exhaust and intake are good seeing as the jeep ran before. Starter cranks good cause its brand new.

87xjDave: ok so I dont not have spark at the plugs, i pulled on off and tested on a ground, no arc whatsoever. I tested the wires awhile ago but have not tested again. Im going to try and get to it tomarrow. I did however do the ICM refresh as cruiser54 said to do. Pinching the contacts, cleaning with electrical parts cleaner and applying dielectric grease.

67GMC: I will do it agian, i actually have done it the past few times i got a chance to go work on the jeep. So the starter and battery are brand new. The jeep cranks over very well. RPM wise i have not a clue. I can try with the old coil again tomarrow.

Last edited by trovilcl; 11-27-2014 at 10:02 PM.


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