CIS-E DPR

[Huw Powell]

That is really only true of the "hybrid" we called "cis-turbo".

The (later - my 83 5kt was straight cis) turbocharged systems are far 
more finicky of parameters than their naturally aspirated stablemates.

Still good info, though!

(and thanks, blush)

On 12/30/2015 10:56 PM, dgraber460 at aol.com wrote:
> Also don't forget the sage advice of the late Phil Payne;
> For CIS there are 3 CRITICAL factors that must be precisely in spec
> 1 fuel pressure
> 2 fuel pressure
> and most importantly
> 3 fuel pressure!
> I drove my URQ for months with the FP gauge connected under the hood
> while I dialed it in.
> The DPR has an adjustment screw on the bottom under the brass plug. If
> you can get cold pressure set but not full warm pressure or vice versa,
> you might need to take the regulator apart and adjust that screw to get
> the 2 end points in range. At 5,280 ft altitude I spent months adjusting
> the pressure. AND - Don't forget the hex bolt on the lower side of the
> fuel distributor with it's internal piston and shims.
> Daunting task! Good luck.
> Cody - as a pro you probably already know all that, but thought I'd
> throw it in for any others that might be fighting the same battle.
> I must say that had it not been for Huw and Phil, I would not have stuck
> with URQ ownership as long as I did. They solved my problems answered my
> questions and "talked me off the ledge" time after time.
>
> Dennis
> Denver
>
>
> -----Original Message-----
> From: Cody Forbes <cody at 5000tq.com>
> To: audi <audi at humanspeakers.com>
> Cc: quattro <quattro at audifans.com>
> Sent: Wed, Dec 30, 2015 11:56 am
> Subject: Re: CIS-E DPR
>
> I'm going to buy you a tee shirt that says "CHECK THE "SPARE" FUSE, lol.
> Then I'm going to buy one for myself so I remember it ;-).
>
> -Cody Forbes (mobile)
>
>> On Dec 30, 2015, at 1:21 AM, Huw Powell <audi at humanspeakers.com>
> wrote:
>>
>> Oh yeah, I'm sure you checked the "spare" fuse, right?
>>
>> And remember, CIS had a purely mechanical version.  It will work with
> no working electronics at all (E won't start well though).
>>
>>> 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)
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