CIS-E DPR

[Huw Powell]

Only if everything was running at spec when you did it.

Which this one probably wasn't.  CIS has always been very forgiving, 
allowing adjustments to offset all kinds of issues (up to a point, anyway).

It is fairly easy to have an ancient, leak-ridden engine adjusted to the 
point where the DPR can seem irrelevant (at warm idle, anyway).

(I smoke tested my 300k 90Q, or maybe the last one, and it just came out 
of everywhere - TB butterfly axles, non-repairable stuff like that.  I 
did find the "big" leak I was looking for, of course.)

On 12/29/2015 11:32 PM, Cody Forbes wrote:
> Quick question since I'm fluent in CIS, but not -E. Is it safe to presume that disconnecting the electrical connector from the DPR with the engine running should have a noticeable effect?
>
> I haven't made up a DPR adjustment wiring harness yet. I just finished replacing all of the injector seals after they failed a smoke machine test miserably, but while certainly A problem, that wasn't THE problem. Just as a quick check I disconnected the DPR and it made zero difference in the idle. The engine is lean. For testing purposes I cranked the metering plate adjustment screw to get it to run well enough to establish a good idle (and recorded the change). Again tried disconnecting the DPR and no change. This is on a cold engine. I have already pulled the DPR and checked its screens which were clean as new.
>
> Thursday I'll make a harness and check the current, but in the meantime this info will help me gather my thoughts.
>
> -Cody Forbes (mobile)
> _______________________________________________
> quattro mailing list
> http://www.audifans.com/mailman/listinfo/quattro
> http://www.audifans.com/kb/List_information
>