Hi guys,
My first thread so don't kill me. I've got a 98 4.0. It was hesitating and backfiring through the intake on hot or cold start up for about 2 minutes, then it would run fine. Searched and searched but couldn't really find a consensus on what the problem was. I decided to replace the upstream 02 sensor. Voila! hesitation cured, and I'm hoping with the mixture right I might get a little better mileage. However, I'm noticing the temp. gauge is reading high 130's low 140's. I'm not sure but my gut says the temp is still where it should be. Is it possible the o2 sensor replacement would lower the operating temp by that much? It was running 190-210. Thanks guys.
My first thread so don't kill me. I've got a 98 4.0. It was hesitating and backfiring through the intake on hot or cold start up for about 2 minutes, then it would run fine. Searched and searched but couldn't really find a consensus on what the problem was. I decided to replace the upstream 02 sensor. Voila! hesitation cured, and I'm hoping with the mixture right I might get a little better mileage. However, I'm noticing the temp. gauge is reading high 130's low 140's. I'm not sure but my gut says the temp is still where it should be. Is it possible the o2 sensor replacement would lower the operating temp by that much? It was running 190-210. Thanks guys.