Originally Posted by
eallanboggs
I thought the same as others mentioned above. It's a lot easier to put a torch on a stuck O2 Sensor than it is to drill a hole and weld in a new bung. Have you checked your Freeze Frames? Try to duplicate the conditions recorded by the Freeze Frame data and then monitor the PIDs that effect fuel control. Have you tried to determine why only one bank is LEAN? Exhaust leaks can cause you to go lean as easily as intake leaks. Have you tried to watch your STFTs while you spray bank1(starter fluid, propane, brake kleen). Your STFTs will react quicker than your idle speed. Remember LEAN doesn't always mean too much air. The stioch ratio is 14.7:1. What if your problem is fuel starvation instead excess air because of the more common vacuum leak? You're LEAN either way.
