mattdev
15+ Year Contributor
- 349
- 2
- Jul 15, 2006
-
San Antonio,
Texas
My problem is very similar to the problem found here:
http://www.dsmtuners.com/forums/problem-diagnosis/126419-bouncing-o2-voltage.html
However there is very little response to the problem and doesn't have a clear answer.
The ECU is supposed to ignore o2 readings at WOT.
Would faulty o2 wiring or sensor cause an osculation like that (at WOT)?
What about fuel pump voltage, or a bad alternator? (no rewired fuel pump)
After logging, it shows my timing is being pulled, back and forth. It goes from 10 to -5 to 7 to 0, etc. It's all over the map. I have a very small boost leak at the TB Shaft Seal. I have a GM MAFT, so boost leaks before would not be metered, and shouldn't cause me to run rich. Would bad plugs cause this, my plugs are about a year old. What else could cause this?
http://www.dsmtuners.com/forums/problem-diagnosis/126419-bouncing-o2-voltage.html
However there is very little response to the problem and doesn't have a clear answer.
The ECU is supposed to ignore o2 readings at WOT.
Would faulty o2 wiring or sensor cause an osculation like that (at WOT)?
What about fuel pump voltage, or a bad alternator? (no rewired fuel pump)
After logging, it shows my timing is being pulled, back and forth. It goes from 10 to -5 to 7 to 0, etc. It's all over the map. I have a very small boost leak at the TB Shaft Seal. I have a GM MAFT, so boost leaks before would not be metered, and shouldn't cause me to run rich. Would bad plugs cause this, my plugs are about a year old. What else could cause this?
