mvvette97
December 3rd, 2022, 03:33 PM
Hi guys have a problem with running extremely lean. I got the 6.0 put back in the s10 due to pulling the heads and putting new lifters in. I was logging the idle and it started climbing in the trims to a point where it maxed out the drivers side and passenger side was not far behind. I thought the intake gaskets were leaking since I reused them so put a new set on and the same.I tried unhooking both o2 sensors to see what it would do Monitoring it with an installed stand alone wideband and it was reading 19 afr. It was actually running not bad. Any idea what could cause this? It was fine before. I did find on the shorty headers it was leaking at the header gasket and also down on the 3 bolt collector pretty bad. The O2 sensors are down stream of the leaks as well as the wideband sensor. Could the exhaust leaks of messed with the o2s making it go positive on the trims? If so I'm guessing it would mess with the wideband as well since they are both down about 8 inches from the leaks.Could it be not really lean and just being fooled to think it is from the leaks? Thats the only thing I can come up with.