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Showing results for tags '4.2l six'.
I am writing about my 1984 CJ7, 4.2 I6, manual trans with the Mopar fuel injection kit installed. The Jeep has been in storage for the last nine years and I am getting her going again. I had to do some engine work on it, but this is not the source of my problem. Since getting it running again (she runs well sitting still and accelerating under load) A peculiar problem has emerged. When I slow to come to a stop the engine dies and it is only when coming to a stop. Since it sat without running for so long, I have removed the fuel tank and cleaned, replace the sending unit and all hoses, installed a new filter, a new fuel pump, a new pressure regulator and an idle control air valve. The engine always restarts immediately. This problem didn't exist before having to put it into storage. I am at a loss as to what else to look into. Any ideas? Thanks Terry Utecht Littleton, CO
I have a problem with accelerator lurching at crawling speeds since I installed my MPI/EFI conversion kit to my 4.2 six. I thought I recalled seeing a remedy for this in my Ludel's CJ rebuilders manual but for the life of me I can't find it. Any suggestions?
The great state of California and I once again disagree on how well my engine is running. Its an 82 CJ7 258ci with about 2500 miles since complete rebuild. Hesco MOPAR MPI kit added. And to me it seems to run great. But I failed smog due to high NO. All other tests (including HC and CO) passed. The strange thing is, the last time (two years ago) I passed no problem. Since then I have not made any changes. I did check faults and it was showing a code for the O2 sensor. Since I read that it is a common cause I thought I had my solution. Unfortunately when I went for a re-check it still did not pass. The smog guy asked if I drove the Jeep after replacing the O2 sensor to let the computer adjust operating parameters. But I had only driven it a few mile to the shop for a re-check. How far do I typically need to drive to get things to reset? The O2 sensor fault has not returned. Is there a way to know if the problem is gone without spending the money on another check? Lou