General erratic idle Throttle Body nightmare

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General erratic idle Throttle Body nightmare

Stewie

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Joined
Jun 3, 2004
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Germany.
Howdy all.
I've got a '92 Fiat Uno 999cc 1.0E, with the Bosch Throttlebody.

I bought the car last week and was having problems with it cutting off at slow speeds and not idling corectly.
After having read a few postimgs here on the forum, I took it to the local fiat dealer and asked them if they thought it was the vacuum advance. They said the vacuum advance and the distributor were ok and that the culprit was the Throttlebody (maybe it was a sensor connected to the housing of it, but the guy's german was too fast for me to understand). In any case, the TB is only sold as a complete unit... I found one at a scrap yard, cleaned it up and swapped them out.
The idle problem was better and the car wasn't cutting out anymore.
It was fine for a week or so (about 500km).
Now, a week later, the idle is very unpredictable and sometimes after starting it (cold or warm starts) it will idle but when you press the gas pedal - no reaction or it'll sound like the timimg's jumped.. By the 2nd or 3rd try it'll go and run fine again. It seems to run best on the Autobahn, although it has started to periodically skip between 110-140 kmh.

Any thoughts or tips would be great!
 
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