lack of power issue

[David]

Timing belt slip a tooth or two? 

Dave
1987 CGT 2.3
SE VA, USA
> 
> From: Rokas Reipa <quattrorokas at gmail.com>
> Date: 2004/10/21 Thu AM 07:57:09 EDT
> To: michael <kazin-audi at thismetalsky.org>
> CC: quattro at audifans.com
> Subject: Re: lack of power issue
> 
> Michael,
> 
> Even though you pressure tested the intake system, check the Michelin
> Man hose. Remove and inspect carefully, replace if necessary. HTH,
> 
> Rokas
> 95.5 S6
> 
> 
> On Thu, 21 Oct 2004 06:44:38 -0400, michael <kazin-audi at thismetalsky.org> wrote:
> > 
> > Car: 1990 200 Quattro 10v turbo.  TAP chip and wastegate spring, K&N filter,
> > both installed by previous owner.
> > 
> > Symptoms: In gear, RPM won't reach 4000, severe loss of power, feels like
> > there's no difference between 10% and 100% throttle, boost never above 0.9 bar
> > as indicated by stock digital gauge.  Car struggles to accelerate, to get up
> > hills, etc.  This started suddenly, no indication, no noises, nothing.
> > 
> > Replaced: thermostat, multi-function temp sensor, throttle position switch,
> > plugs, wires, distributor cap & rotor, coolant, fuel filter.
> > 
> > Tested: compression looks good
> > intake path from airflow sensor pressure tested, no leaks whatsoever
> > ECU reports 4-4-4-4, no check engine light
> > all fuses intact, all necessary relays present but untested
> > audible whine from fuel pump
> > turbo spins freely, no shaft play
> > throttle opens and closes properly, and fully
> > spark plugs a medium-light tan color
> > temperature as indicated by dashboard gauge appears within range
> > idle stabilization valve seems to buzz happily
> > idles fine (other than minor warm start issue)
> > 
> > At this point, I think the next things to try replacing are going to be
> > expensive.  I'm guessing it's a fuel delivery issue, the fuel pump sounds a
> > little sick.  Though I'm comparing that to the Walbro pumps in my other two
> > cars, I don't know if they're supposed to sound the same.  I also thought
> > possibly it'd be injectors, or some part of the fuel distributor setup.
> > Really, I don't know these cars well enough yet.  Also, I plan to change the
> > oil... not that it will make any real difference.
> > 
> > I read that there's a screen somewhere in the fuel distributor that sometimes
> > gets clogged, have not yet taken it all apart to test this, it was to be my
> > next step.
> > 
> > I do not have volume 1 of the Bentley manual (though I have the other two,
> > previous owner must have misplaced that one).
> > 
> > Anyone have any ideas?
> > 
> > --
> > Michael Stella - http://www.thismetalsky.org
> > '97 AWD Eagle Talon & '92 Galant VR4 #1000/1000 & '90 Audi 200 Quattro
> > _______________________________________________
> > quattro mailing list
> > quattro at audifans.com
> > http://www.audifans.com/mailman/listinfo/quattro
> >
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
>