[urq] Ideas for rough running continued

[Pasqualoni, James E]

Just throwing it out there since I don't recall seeing it:  How about spark
to all cylinders under 3k RPM?  Have you tried swapping in a known good
distributor?  Other ignition components?  When cold, does the car start in a
similar timeframe as before, or does it require more cranking than normal?
How about when warm?  

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of Brandon Rogers
Sent: Thursday, March 24, 2005 5:16 PM
To: Urq List; Ingo Rautenberg
Subject: Re: [urq] Ideas for rough running continued


Are you sure you pressure tested properly?- seems to be load-related, no? 
Which would seem to steer away from intermittent electricals, right?  Maybe 
it is clogged kittty-  might as well pull it off and see...

oh wait - i just re-read - you do make it up the two hills- so does it 
always stall in the same place? - have you tried letting it idle for a long 
time to really warm it up first...

just trying to jar a thought out of the noggin....

I guess I'm looking for some sort of pattern - load related, temp 
related....???

how does the motor sound going up the hill?  hissing? sputtering? 
backfiring?

anything? anyone?anyone?

Brandon



----- Original Message ----- 
From: "Ingo Rautenberg" <i.rautenberg at waratap.com>
To: "UrqList" <urq at audifans.com>
Sent: Thursday, March 24, 2005 1:32 PM
Subject: [urq] Ideas for rough running continued


OK, fuel pressures check out - system ~90 PSI regulated after warmup 55 PSI.
What's been replaced so far with known goods: ECU, idle valve, fuel 
distributor, warm up regulator.
Fuel flow test 18 seconds 750 ml. Vacuum feed directly from back of IM to 
ECU.
Fuel pump jumpered to run when ignition on regardless.

Ongoing symptoms:

low (600-650 rpm) idle (rough)

When proper duty cycle 45-55% adjustment is made (frequency valve buzzing), 
car will make it out of the driveway (steep) and then up a not-so-steep 
(10-15 degree) incline 200 ft and then stalls and won't restart.  Fuel 
pressures unchanged.  Roll down backwards into driveway (or not), turn CO 
adjustment two to two and a half turns to the right and car starts (every 
time -- but won't idle).  Still runs funny and duty cycle now 5%.

So, I'm thinking replace airflow meter (have feeling it's sticking) or does 
this also sound like it could be a clogged exhaust?  What throws me is that 
I can consistently turn the CO screw to richen the mixture after stalling 
and it will start (but not idle).  Still stumbles, though.  And the soot out

the back is black/gray.  I was thinking crank/flywheel position sensor might

be intermittent (wouldn't that suck), but doesn't explain being able to 
start the car when enriching mixture.  Also, have tendency to have backfires

through air meter...

Ingo (still mit ailing '84 Urq and WX motor)


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contributions welcome!