Test Drive #2 (Fail):
Took it out again, IAC unplugged from harness from the very beginning. Still drove like POS. Next?
Took it out again, IAC unplugged from harness from the very beginning. Still drove like POS. Next?
Think I got the under-dash wiring issue solved. Was able to do the Key On Engine Running test with the tester.
First problem: The cylinder ID code came up as 6.
The codes I got were:
31: EGR valve control system below minimum voltage (I don't have EGR)
91: HEGO sensor voltage low/system lean
What would cause it to think it's a 6 cyl? Bad plugs? When I checked them the other day two of them had way more resistance.
I'm going to have to try the balance test tomorrow. Will it work properly even though it said 6cyl?
I'm also considering bypassing the factory harness and running brand new wires for the O2 sensors. The wires for the driver side have been cut (not sure where). The passenger side is the only side hooked up. Thought I read somewhere that if you only had one hooked up it should be the driver side.
That might be the issue........code 91 is the drivers side.
You need both sides working. You can remove and replace the entire harness or resplice the drivers side.
Run the cbt three times. Each successive time the computer widens the specs. Three fails and you have a dead cylinder. I just did this test myself and found my #4 injector dead to the world.
As for the harness....junkyard?
I can't help on the a/f, but I think you are on the right path. Fix the o2 sensor and trouble shoot the #8 cylinder and I think your problem will be fixed.