Volvo FI help request

[David Cooley]

Ron,
Those use a mechanical air flow sensor... the vane jams open and will make
it run pig rich.
It may be able to be cleaned, but it's doubtfull... All of them I have seen
have had to be replaced.
Take care,
Dave

-----Original Message-----
From: Ron Gregory <rgregory at syty.org>
To: diy_efi at esl.eng.ohio-state.edu <diy_efi at esl.eng.ohio-state.edu>
Date: Monday, January 18, 1999 1:09 PM
Subject: Volvo FI help request


>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
>
>