'90 90non-q fuel problems?? Please help!!

[Huw Powell]

your car was very likely tuned for the way the previous regulator was
set up - and not it is way off.  unplugging it goes to "limp home" mode
in whihc it will idle fine.  If you can measure the current going to it
when the engine is warm (if you can get the engine warm that is!) you
can adjust the fuel mixture with a 3mm allen til it hovers around 0 mA
(up and down a little).

there are pix of this somewhere on my web site.

you could also try just richening the mixture (turn allen CW) a 1/6th
turn at a time and see if you get close enough to keep it running then
fine tune it.  If it was too rich, turn the other way.

If you can't measure the CPR current, get it warm by the above seat of
the pants method and at least get it so the OXS voltage cycles properly,
up and down for about the same amount of time.  Then bring it somewhere
with a CO meter for the exhaust (this is actually the right way to
adjust the static mixture)

tb85020 at excite.com wrote:
> 
> Hi folks,
> I'm a new lister but long time Audi lover (even though they don't always
> love me back!)  My current problem is with my 90 (non-q, 2.3L, 5spd)  I
> noticed that gas was leaking out around what I think is the fuel pressure
> regulator (little black box about 2" x 2" that bolts on to the side of the
> fuel distributor), so I took it off and went down to my local
> pull-your-own-parts junkyard where I found a nice looking one with the same
> exact part number (along with 2 brand new looking o-rings)  problem solved,
> so I thought.  After I installed it the car started right back up ran for
> about 20 seconds and then died.  after that it would do the same thing every
> time I started it, run fine for 20 secondsand then die.  Then I thought well
> maybe my old part wasn't bad after all and it was just the old o-rings had
> started to leak, so then I put my old one back on but used the new o-rings.
> Same thing... runs fine for 20 seconds then dies (actually it slowly dies,
> like it is starved for fuel) if you floor it, it will smooth out for a bit
> but then slowly die.  BTW, no smoke out the tailpipe so I know it is not to
> much gas rather it is not getting enough...   Then I disconnected the 2 wire
> plug that goes to it and guess what?  It stayed running.  So what is it???
> I really don't understand.  I'm sorry about the length of this message but
> if anybody has any clues it would help me out greatly!
> Thanks!
> Tom
> '90 90non-q
> '89 200non-q
> '86 4kcsq
> 
> _______________________________________________________
> Send a cool gift with your E-Card
> http://www.bluemountain.com/giftcenter/

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/