1998 Chevy Tahoe V8 Four Wheel Drive Automatic 157000 miles
I've got three o2 sensors on the duel exhaust that runs side by side on the pass side. On the one closest to the outside I've got a 3 wire pre cat and an after cat sensor. Just 1 after cat sensor on the inside pipe.I ran through some deep water and got stuck, the water was just over the exhaust pipe. I shut the engine off and the water ran up into the exhaust and shattered the inside of the cats. It started running rough and backfiring out the exhaust. I cleaned all the guts out of the cats the next day thinking that all the blockage was causing my problem but it still ran the same. My question is would water on the hot o2 sensors cause them to malfunction and make the engine run rough and backfire out the exhaust. Its not throwing a o2 sensor code. The only code is a po341 code. The engine smells like it is running rich. It is undrivable.
have the same problem?
Wednesday, April 8th, 2009 AT 11:22 PM