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Showing results for tags 'mopar efi conversion'.
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
Vehicle background: 1983 Jeep CJ7 Laredo 4.2 with Hesco MPI kit Westside Performance Valve Cover (thick cast aluminum replica of the stock cover) T-18 four speed Dana 300 Dana 44 axles front and rear (4.27 to 1) 36" Swamper TSLs I bought this Jeep in 2003 odometer had 145,000 miles, now has 170,000, it does not get driven all that often. Plaque on the motor reads "MOPAR Performance", it is a mopar 4.2 crate motor with a remanufacture date of 1998. My estimate is that the motor has ~80,000 miles on it.
Happy Thanksgiving to all! I've posted before that my CJ-7 has a Cherokee 4.0L in it, but it's not really that simple Here is the history as I know it or can guess from some evidence: 1. Originally a 258/4.2L straight six with the FrankenCarb--this one was sold in California, so I'm sure it was extra-special. 2. MOPAR EFI kit added to the 4.2L. It seems this addition happened sometime after 2000, as the MOPAR labels for the kit have a 2000 copyright on them. I learned from the shop that did most of the work on this Jeep that the lady I bought it from purchased it sometime around 2001. It w