1999 toyota camry V6 starts and runs for a few mins, then starts to miss. I pulled the spark plugs and notice that the left bank plugs were wet from fuel as if it were flooded. Other side is ok. While running I noticed that unburnt fuel was leaking from the left bank exhaust flange gasket. Both O2 sensors have been changed. It runs smooth for the first 2 minutes, then the engine runs slightly rough and thats when I notice the unburn fuel seeping out of the flange gasket. Could it be that the spark for that left bank is not firing, after a few minutes after starting? Im thinking that maybe the flange gasket will cause a defective reading by the O2 sensor that sends the signal back to the computer, that keeps the engine running rich on that bank? Another possibility could be my fuel pressure regulator could not pass a vacuum hg test. I will be changing the fuel pressure regulator, and the exhaust flange gasket. If you have any other advise that could help, please feel free to assist me in the right direction.
have the same problem?
Thursday, September 1st, 2011 AT 4:40 PM