'86 4kq no wanna take gas, Capt'n

[Huw Powell]

> Well, the problem with the '86 4kq that the PO told me about has finally,
> after 4 months or so, surfaced.
>
> The car starts and runs fine cold.  In fact, it runs fine until after about
> 20 minutes of driving, way after the water/oil temps are up to normal
> running temps.
>
> The unwillingness to take gas, and the stumble and black smoke phase seems
> to last 10 minutes or so, then the car gets progressively better at taking
> gas.  It always idles fine.
>
> All of the things I can think of would make lean, not rich (vacuum leaks,
> for instance).  I'm thinking the black smoke is a rich indicator.

i think you are right...

> Any clues of what might be wrong, or hints at what/where to test would be
> most appreciated.

Fuel distributor... remove the boot and see if the air plate moves
freely up and down.  Check the OXS output voltage while running, and DPR
current... are they doing the right thing?

(see http://www.humanspeakers.com/audi/timing2.htm )

--
Huw Powell

http://www.humanspeakers.com/

http://www.humanthoughts.org/