4.2 Fuel Injection Conversion
- Thread starter pjensen2512
- Start date
I had my 1990 4.2 with a two-barrel carburetor converted, and it went extremely well. At the time, Mopar sold a kit to make this change but it is no longer available. It was worth it regardless of cost as the 1990 4.2 vacuum and emissions systems were extremely complicated and unreliable with many aging parts that were no longer available. In California, it was getting very costly to pass the Smog testing.
All has been good since the conversion, including one engine change not related to Fuel Injection. The entire system moved right onto the new 4.2L long block.
The conversion included a computer control that turns the fuel delivery system essentially into a 1994 4.0, except, the engine is still a 4.2.
If I had it to do over, I'd do it in a flash. I only regret not doing it sooner.
All has been good since the conversion, including one engine change not related to Fuel Injection. The entire system moved right onto the new 4.2L long block.
The conversion included a computer control that turns the fuel delivery system essentially into a 1994 4.0, except, the engine is still a 4.2.
If I had it to do over, I'd do it in a flash. I only regret not doing it sooner.
Did you end up switching to EFI? What system did you purchase? I am failing emissions on 89 wrangler I just bought , seems like best way to guarantee it will pass and continue to pass in the future
I had a Howell system on one of my CJ's. Its a great way to remove 2 miles of crap under the hood and make it run right.
Yes, at that time I lived in Commiefornia. The leader of all that is screwed if it runs on fossil fuels. IIRC and likely still there was 2 kits. One was CARB approved and came with the sitcker with the CARB reference number so the goons at the smogs shop would know its Ca approved. It also cost more.