160 bl"s
- Thread starter rb68rr
- Start date
thats one thought. the O2 sensor circuit in the ECM has its own ground wire that connects to the engine.
It sounds like its in the O2 circuit path anyway....
When the sensor is cold, its behaves like an open circuit (like its disconnected) so the ECM has internal circuitry (bias resistors) to make the input go to mid range, so the loop does not close, and the integrator/BLMs do not update. Once the sensor warms up, it drives the circuit normally. But a grounded wire would do something like this...
Bob
It sounds like its in the O2 circuit path anyway....
When the sensor is cold, its behaves like an open circuit (like its disconnected) so the ECM has internal circuitry (bias resistors) to make the input go to mid range, so the loop does not close, and the integrator/BLMs do not update. Once the sensor warms up, it drives the circuit normally. But a grounded wire would do something like this...
Bob
OK, found most of the problem! Two wires in the wiring harness on the drivers side were melted together and touching the exhaust manifold! Separated them and taped them up and now she will at least run better! BLM's down to 135! But when it rains it pours! Now my brake light started flashing on and off every couple of seconds! It finally quit though but here is something really weird! When i touch the brakes the brake light comes on and my BLM's go to 160 again! What would the brakes and the BLM's have to do with each other??? Confused!!! 
WH1_T-Type
Well-Known Member
- Joined
- Jun 1, 2009
Sounds like you need to start tracing every single wire. Ouch. Don't envy you that job, that's for sure.
