Scarlett Semko wrote:
>
> MMMmmmm,
>
> A new problem/opportunity/challange/pain in the @#% to deal with.
>
> Upon start-up my 1.9 runs rough. Rough idle, push on the gas and it will
> probably stall, or long hesitation before the idle increases. Once it
> warms up, around 3 to 5 minutes it smooths out and operates normally
> (whatever that means).
>
> Any ideas Oh Mighty List?
>
> Thanks in advance
> Ron Semko
> Orlando, Florida (the mouse trap for people)
> 1984 Vanagon with 200,000 plus miles (I don't know how many + cause my
> odometer dosen't work anymore)

Scarlett,

Sounds like there is no warm up enrichment. There is a temperature
sensor in the engine that reports engine temp to the Digijet control
module (DCM) by varying a 5 volt signal. When cold the DCM richens the
air-fuel mixture and gradually leans it out over a 3-5 minute period.
The sensor should have high resistance when cold (~2-3,000 ohms) and low
when hot (~400 ohms).       JP