[urq] Post overhaul issue, 83 Urq

[dgraber460 at aol.com]

Wow – does this bring back memories!

I’m assuming your using the OE CIS fuel system? Your mention of Phil Payne (r.i.p. old friend) brought back a flood memories, as well since Phil single handedly kept me an URQ owner for more years than would normally have been the case. If you follow Phil’s expert write-ups further you will discover that he emphatically claims that there are three major issues to get these old beasts to run well – 1) fuel pressure, 2) fuel pressure, and 3) fuel pressure. Two components are the focus with CIS. 1) Warm-up pressure regulator, 2) Fuel Distributor with its hex bolt and internal shims. These 2 must play nice together, or you will be chasing your tail. The warm-up regulator leans the mixture as the engine warms up and I would bet that is your issue.

FWIW – it took me about 2 years and a lot of testing, including running a fuel pressure gauge under the hood for real time monitoring, to get it dialed in. Put on your “patience hat” and be ready for a lot of frustration. My mental make-up would have given up on CIS many times except for Phil, and finally taking it as a “personal challenge”.

Dennis Denver



-----Original Message-----
From: Jim Haseltine <jim_haseltine at ntlworld.com>
To: David Ritter <dave.ritter at gmail.com>; urq <urq at audifans.com>
Sent: Sat, Jul 30, 2016 4:14 pm
Subject: Re: [urq] Post overhaul issue, 83 Urq


If you hadn't replaced the fuel filter that's what I'd be blaming. Is it an OE filter or aftermarket? Some AM filters are able to deal with the pressure froma CIS pump. Check your fuel flow. Once from cold and then again as soon as the car has stalled, I suspect you'll find quite a difference. Regards, Jim Haseltine ----- Original Message ----- From: "David Ritter" <dave.ritter at gmail.com> To: <urq at audifans.com> Sent: Saturday, July 30, 2016 10:03 PM Subject: [urq] Post overhaul issue, 83 Urq > My 83 . > Urq has been off the road for a couple of years waiting for me to replace > the head, exhaust manifold and turbo. My old exhaust manifold was cracked, > warped and leaking. The head had a couple of stud issues. > I managed to finally gather up everything I thought I would need and tore > it apart following the guide Phil Payne wrote up many years ago still > found > on Audifans. The whole project really went pretty well and I only had a > couple of minor problems with reassembly. > The Water Pump, Timing Belt, Spark Plugs, Fuel Pump and Fuel filter and > air > filter have all been changed. The injectors got new seals before going > back > in. Most of the old gasoline was siphoned out and replaced with new > gasoline and some injector cleaner. > On cold start it seems to run perfectly normal for a few minutes, boosts > normal, idles smoothly. > Unfortunately, approaching normal operating temperature, power loss, > missing (feels initially like a fouled plugs), low idle and stalling out. > This will occur whether driven for a few minutes or just left to warm up > idling. > I've tried to go back over everything and can't figure out what got messed > up. > > Does this sound familiar to any of you experts? > Thanks for listening, > > Dave > _______________________________________________ > Audifans urq mailing list > Manage your list connection: http://www.audifans.com/mailman/listinfo/urq > http://www.audifans.com/kb/List_information > > Pictures/Polls/Database at: http://autos.groups.yahoo.com/group/urquattro/ > > _______________________________________________ Audifans urq mailing list Manage your list connection: http://www.audifans.com/mailman/listinfo/urq http://www.audifans.com/kb/List_information Pictures/Polls/Database at: http://autos.groups.yahoo.com/group/urquattro/