Volvo FI help request

[Greg Hermann]

>I have a buddy with a FI Volvo (either '84 or '85), that is
>acting up.  It will start fine, but about 30 seconds later,
>it will start to pump black smoke everywhere...big-time rich.
>He pulled plugs and they are wet and black...
>
>He's replaced about everything I can think of...
>air sensor, IAC(or whatever Volvo calls it),
>fp regulator, temp sensor, O2 sensor,  etc.
>He wasn't too sure how to test any of those
>sensors, so he's just been using the
>"I'll swap it to see if it gets better" method
>of auto repair
>
>He hasn't touched the ECM, injectors,
>ignition module, or distributor.
>
>Is there any sort of data stream coming out of the
>ECM that we may be able to watch to get clues?
>Will that ECM blink codes (a la Delco ECMs)?
>
>Please respond directly.  I'm a digest subscriber, and I'm
>sure most of the rest of the list couldn't care less...
>
>Thanks,
>~ ~ ~ ~ ~ ~ ~
>Ron Gregory
>rgregory at iname.com

If it is not the coolant temp sensor (or the wiring to it) (this is what
has caused the described symptoms on every Volvo I have seen do this), try
nosing around to see whether something is causing the starting enrichment
injector to stay on all the time.

Regards, Greg