could this be the temp sender???

[Huw Powell]

> I went to start my 4KQ up this morning .... The mixture meter I installed was
> pegged at rich (this is odd as it is usually lean) then the car falls on its
> face and dies. I managed to get it to warm up by holding the throttle part
> way open. after it got warmed up the mixture meter was back to its usual
> activity. I am guessing that this has something to do with the temp sensor
> that sends the ECU signals.

first, on a cold start it *should* be rich.  second, if that meter is
running off the OXS, who knows how accurate it will be until the OXS is
warmed up anyway?  Third, it sounds like something that was supposed to
let air in at cold idle got stuck closed (like your ISV), you
compensated by letting air in pedally.  And now it is unstuck again
according to your later post...

You might want to give the ISV a quick clean sometime when you're bored.

--
Huw Powell

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

http://www.humanthoughts.org/