Warren Mohler Posted January 18, 2020 Share Posted January 18, 2020 What is the best CPS out there for an 89 4.0L. Rain ,sleet, snow out and mine must be getting weak, left a wake this afternoon for a good friend and MJ wouldn't start, unplugged and plugged fired right up so I will be replacing soon, is MOPAR still available? Link to comment Share on other sites More sharing options...
Ωhm Posted January 18, 2020 Share Posted January 18, 2020 Cruiser has a tip out there for drilling out the mounting holes and moving the CPS closer to the trigger wheel (increasing signal strength). RENIX CPS TESTING AND ADJUSTING Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 18, 2020 Share Posted January 18, 2020 Mopar should still be available. Numbers a dwindling but they are still around. Link to comment Share on other sites More sharing options...
MJCARENA Posted January 19, 2020 Share Posted January 19, 2020 I had the same issue in my XJ. Dirty connector, had to do the unplug, plug about every 6 months. Finally just jumpered around the connector and never had the issue again. I left the connectors connected and just spliced wires around them, in case I ever had to replace the CPS. Link to comment Share on other sites More sharing options...
Warren Mohler Posted January 19, 2020 Author Share Posted January 19, 2020 Thats a good idea,I should measure volts, mine is original I believe so may just replace as it's 31 years old, sucked standing in pouring rain and sleet today to get at it, and of course lock tab broke off Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 19, 2020 Share Posted January 19, 2020 I’m using a 30 year old CPS. Works great! Came from a WA motor. Link to comment Share on other sites More sharing options...
Eagle Posted January 19, 2020 Share Posted January 19, 2020 The factory had a TSB and a kit to bypass the C101 connector so the two wires from the CPS went directly from the CPS connector through the firewall to the ECU. This was supposed to alleviate signal loss. I don't know if the associated kit (which was the CPS with the replacement wiring harness) is still available, but it should be easy enough to make up your own. Cruiser, do you by any chance have the part number and/or instructions for that kit? Link to comment Share on other sites More sharing options...
Warren Mohler Posted January 19, 2020 Author Share Posted January 19, 2020 Yep, put one in once,pain in the butt Link to comment Share on other sites More sharing options...
fiatslug87 Posted January 19, 2020 Share Posted January 19, 2020 Here's the CPS direct wiring TSB CPS-87-90-update.pdf Link to comment Share on other sites More sharing options...
Eagle Posted January 19, 2020 Share Posted January 19, 2020 That's the one. Thank you. Link to comment Share on other sites More sharing options...
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