[CIS-E]: What does the potentiometer do, and others? a bitlong...

[abatzis2 at hotmail.com (Michael Abatzis)]

> -----Original Message-----
> From: Allyn [mailto:amalventano@sc.rr.com] 
> > FUEL: I think this is purely mechanical at WOT, and the cpu 
> basically 
> > doesn't contribute. your DPR gets a fixed 16mA
> 
> when i was fixing the rieger and had a meter rigged to show 
> DPR current in-car as i was driving, i dont recall a fixed 
> 16mA under WOT, but if it is in fact a fixed value, then your 
> (idle) sensor plate position will have an effect on it. if 
> you want to richen up what makes it to the engine at WOT, 
> then set DPR current lower at idle. this way when it gets 
> 16mA at WOT, it will equate to a mechanically higher fuel 
> flow for given air flow.
> 
> HTH
> Al

yeah, that's what i figured. the bentley test for full throttle
enrichment involves bridging the coolant temp sensor (which i think only
serves to  simulate a fully warm engine), raising engine rpm >2500, and
tripping the full throttle switch.  the dpr current should then read
16mA. so does that mean my interpretation is correct? if this test
checks out (and it did on my car), then that means you're running on
mechanical adjustment only, and if i have a fuel problem it must be in
the dpr itself, fuel dizzy, or injectors, right? btw, i swapped in a
new/old fuel dizzy that had a good potentiometer. didn't seem to help
much.  also, dyno shop was closed.

----------------------------------------------
Michael Abatzis
New Orleans!
'87 Scirocco 16v, sick right now... 
'88 Scircocc 16v, RIP
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