I bench tested the O2 sensors with a voltmeter and they performed in range. I tested the EGR with a vacuum gauge and it was working fine. I did change the position sensor and eliminated the 34 code. I hve tuned it up and changed the oil and air filter. Now I'm pulling a 66 code (Mass Air).
The has just over 34,000 miles and has never failed before. This time it has doubled it's readings of hydrocarbons.
I'm stumped. |