[urq] 83 urq stumble now 4k cutout
martin at quattro.ca
Mon Apr 28 07:01:36 EDT 2003
You need to check your fuel pressures.
Cold and warm.
4k rpm, either the air temp sensor or the idle switch.
The black connector at the back of the head.
On the '83 this can be either the cold start thermo switch (large one) or
temp gauge sender (small one).
Hope this helps.
1983 Audi Ur-quattro (289,000 km) Canadian spec. winter car
1985 Audi Ur-quattro (166,000 km) Euro spec. import ;o)
> -----Original Message-----
> From: urq-admin at audifans.com [mailto:urq-admin at audifans.com]On Behalf Of
> Brady Moffatt
> Sent: April 28, 2003 01:52
> To: urq; quattro
> Subject: [urq] 83 urq stumble now 4k cutout
> Hi All,
> Well, Louis-Alain and I spent hours on my urq today.
> We checked and tightened many small vacuum and large hoses,
> checked many electrical connectors,
> did fuel pump relay mod (it was at 11.9V before, though the
> connector was in
> beautiful shape),
> removed blowoff valve,
> checked O2 sensor operation,
> checked vacuum at warm idle (12-14" Hg),
> adjusted FVDC to 40% at warm idle,
> other stuff I can't remember.
> Now, the stumble is still there (though I think it's more subdued),
> and there is now a 4K RPM cutout to keep the stumble company!
> We also noticed that the black 2 pin connector on the back of the head is
> missing. It's probably not related, though.
> Anyways, what to do next to eliminate these problems?
> Brady Moffatt
> Montreal, Quebec, Canada
> 83 UrQuattro with 51,000 miles
> 86 4ksq with 309,000km
> 86 4ksq parts car
> 72 Datsun 240Z with 180,000 miles
> 92 VW Golf with 200,000km FOR SALE
> in middle stages of quattrosis accumulatus
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