dmart

iTrader: (3)

Last year when I put the car away everything was fine (o2s would would go up and down and the car ran in closed loop). After driving the car about 25 miles (for the first time since nov) I noticed it wasn't running so good. Hooked up HPT and noticed no LT/ST FTs, looked at the o2s and neither of them have any input. They are both static at 447mv. I checked the fuses etc (not too sure which fuse is for the o2s though). Wiring seems to be fine. Didn't do any work on the motor/exhaust etc over the winter. What else can cause this?

I may just say screw it and remove the narrow bands completely and just run openloop.

NoGo

iTrader: (2)

I was thinking maybe the car was stuck in open loop due to a faulty engine temperature sensor.

What was your engine temperature? Perhaps your engine temp sensor is not working properly and stopping the car from transitioning into closed loop?

jimmyblue

iTrader: (11)

I see narrowband activity during warmup although
they are usually pegged high. Stuck-to-center to
me usually says open loop from a fault code,
maybe immature or maybe no-SES (rather than
no-error). Read any codes?

dmart

iTrader: (3)

Temp was fine, I'll have to scan for codes again. Even if the car is in open loop shouldn't I still get feedback from the O2s?

jimmyblue

iTrader: (11)

You should, but fault response is to go open loop
-and- stick the O2s to center. I have forced open
loop before for tuning using the ECT enable temp
and still been able to see O2 activity.

dmart

iTrader: (3)

Hmm then I must be throwing some type of code, I didn't know it would do that.