Hi I`ve got what is seeming like a classic Jimmy 4.3 problem. Hard starting, rough idle and poor mileage. I initially had the P0300 codeand, as I needed new wires, replaced them. Th e plugs were new last year with about 15000 Kms so I havent looked there yet( A job for this weekend). Idle/ acceleration is better but problem seems intermittent at times. A second read is now showing P0147(O2 Heater Bank 1 Sensor 3) Could the miss have caused my O2 sensor to go "bad" or could this code be a result of the miss and my O2 is reading the rich condition? I dont want to chase the problem with parts and certainly dont want to change out the O2 and "blow" the new one. Thanks for the input Jeff
1999 Jimmy 4.3 SLS 4x4 194,000 Km- posted
17 years ago