> You should be able to tell extreme rich from lean by smell,
> and sooty smoke from the exhaust. Proper mix should barely smell at all.
> (don't sniff it for too long ;-)
>
It smells alright. Not super bad but noticeable. Turning the mixture screw
clockwise (in) does what?
> If you EGR vacuum diaphragm doesn't hold vacuum, it could be causing
> a vacuum leak, which will mess up your idle. If it's old/original,
> its probably dead. Even if the diaphragm of the vacuum parts is ok,
> the actual valve is probably clogged with soot. My datsun motor
> was so clogged that I ran it for a week with the EGR stuff completly
> removed (and no plate or anything) until it backfired out the
> carb and blew out the blocks of soot that had been sealing it
> up. Then it didn't run at all.
If I operate the valve manually with my fingers its definately flowing
exhaust. It just wont hold vacuum. The plate idea is very tempting.
Ps
> For diagnosis, you can try blocking off all the vacuum lines to
> the EGR and then adjusting mixture and idle (well you want to block
> off the intake side of them, of course. The EGR side shouldn't matter)
> If that helps or fixes it, you need come up with the EGR stuff. Can't
> help you there. I have heard of unscrupulous people replacing their EGR
> gasket with a thin plate, and still passing smog. In california,
> no less. YMMV.
>
> Good luck.
> --
> Reed Mideke rmideke@interbase.com
>
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