Can somebody ID this new idle quirk?, starts & runs well -- until warm Options

[Prospectfarms]

(IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif)

O.K., I'm better now... D-jet is driving me to drink.

The 1.7 starts and runs well until it warms up. After 10 min. idling smoothly @ 900 it hesitates two or three times and stops idling at all, which means I can't keep it running long enough to set the timing. I can keep it going by feathering the throttle, but my nice smooth idle is gone. I reproduced the symptom three times in a row today.

By clamping off the Vac hoses one-by-one it appears the FI components seem to be doing what they're supposed to. No other vacuum or capacitance probs. found so far. Haven't checked the injectors.

This started after I repaired the ground strap on my distributor -- must have bumped something else. CHT?

I have the FI diagnostic checklists and am working on them. If this was a carburetor I'd say it was running with a clogged idle jet (IMG:style_emoticons/default/wacko.gif) . These symptoms seem specific and uncommon. At least I've not seen others posts that describe the same thing. Did I miss one?

[ThinAir]

This actually all started with this: http://www.914world.com/bbs2/index.php?sho...c=80367&hl=

I thought I had posted my solution, but I can't find it.

Yes, I solved the ultimate problem by replacing the ECU. The car would randomly flood and die immediately. We took the approach that the ECU "never goes bad" because they hardly ever have a problem, but in our case it was the only component that we hadn't changed for a known-good unit so there was little choice left. Since we had one available, it was worth a shot. Problem has never returned and the car made a very successful trip to RRC last Fall with nary a hint of a problem.