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Re: YJ overheating?
The howell kit came with a 1 wire O2. everything in the kit is off a 4.3l GM. The kit came with an dignostics port. you can ground out the ADLA wire and the check engine light will flash a code. Nothing. I put it in field service mode (driving down the road while grounded) and It flashed "open loop" which according to my manual is normal. So as far as the computer is concerned, it doing everything right. I will go pick up a new coolant temp sensor and sending unit, as well as new O2 sensor. Though If one were bad, the comp. should pick up on it? I also think i see a Hi-flow radiator and electric fan in the near future, as many people have told me the older jeeps cooling systems are hardly enough for the 4.2L. I just wish i would have paid the extra 30 bucks for a hi-flow water pump. Live and learn. thanks for all the help guys!
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