Re: Urq sorting out

[Huw Powell <audi@mediaone.net>]

> Took Huw's advice 

that could be dangerous...

> and monitored the O2 sensor voltage.
> At cold start, had .646 to .650.
> At 3 min. had      .616 to 655  The DC read 49.6 at this point.
> Blip throttle =   .555 to .594  DC still 49.6 (steady)
> Lean 3mm screw 1/16 turn = .158 to .173 DC steady 49.7
> blip throttle =       .130 to .159      DC steady 49.7
> Took it down the block and rechecked;
> O2 sensor voltage = .104 to .120        DC at 49.6

let's see, what isn't working?  You're in open loop for starts, your
computer is ignoring your OXS. 

> Grounding (0 ohms) or disconnecting altogether (infinite ohms) the temp
> sender has no affect. The sender registers 90 ohm's when hot, and I have good
> continuity to the ECU.

I take it that is what the temp sender is supposed to read when warm?  

Is there any way for you to try another ECU in the car?

Have you tested OXS signal continuity to the ECU?

Because for some reason, your ECU is not going closed loop and using the
OXS signal to fine tune the duty cycle.

-- 
Huw Powell

http://www.humanspeakers.com/audi/

82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250