Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
