Location: Houston
Posts: 706
My VIN: 16113
Club(s): (SCDC) (DCUK)
Last edited by lazabby; 07-15-2017 at 10:33 AM.
Shannon
Location: Houston
Posts: 706
My VIN: 16113
Club(s): (SCDC) (DCUK)
Posts: 4,807
My VIN: 3937
You can also double check the O2 sensor reference ground wire is still connected properly. It is the one which grounds to the block under the air filter housing, pretty much in the far corner passenger side and towards the front of the car. You can identify it fairly easily because a couple inches of the ground wire has a red wrap on it. The wire is only six inches or so long and the free end has a black quick connector (very similar to the ones used on the ballast resistor connections). The other end of that wire ultimately connects with the ECU behind the driver's seat. It could be another wiring connection that's not making good contact or not connected at all perhaps. And easy enough to check.
O2 sensor ground.jpg
My photo is slightly misleading as I had to relocate mine since the hole it's meant to go into had a broken off screw in it. The red arrow points to the hole your red ground wire is probably screwed into.
Sept. 81, auto, black interior
Location: Houston
Posts: 706
My VIN: 16113
Club(s): (SCDC) (DCUK)
Location: Rochester, NY
Posts: 2,405
My VIN: 01049
Posts: 4,807
My VIN: 3937
Mike's thinking the same thing I was... to confirm what you get for each of the troubleshooting steps:
Dwell troubleshooting.jpg
Sept. 81, auto, black interior
Location: Houston
Posts: 706
My VIN: 16113
Club(s): (SCDC) (DCUK)
Dave M vin 03572
http://dm-eng.weebly.com/
Location: Rochester, NY
Posts: 2,405
My VIN: 01049
-Mike
My engine twists my frame.
1981 DeLorean, Carb LS4 swap completed
1999 Corvette, cam/headers/intake manifold, 400 rwhp
2005 Elise, stock
2016 Chevy Cruze
Location: Orlando, FL
Posts: 1,181
My VIN: Former owner of 1098
Club(s): (DCF)
Lean it out a bit and see if it changes.
Brandon S.
2014 Honda Civic EX
2007 Volvo S60R