Re: all sortsa problems....

["Fred Munro" <munrof@isys.ca>]

----- Original Message -----
From: Nate Brown <ntb@hopper.unh.edu>
To: <quattro@coimbra.ans.net>
Sent: Saturday, April 17, 1999 12:57 AM
Subject: all sortsa problems....


>
> I have a few problems with my 86 5kstq that I was wondering if anyone
> could help me out with.
> Since I bought the car it has run rich and I put it off for a little while
> until I could bring it to a mech. to have it checked out.  I brought it in
> and two weeks later the only thing that was found to be faulty was the
> ignition switch which I knew about anyway.  For a mere $92 I had a car
> that would turn over nicely but not always start.  The ignition system,
> vaccuum lines and fuel system were all checked and the only thing
> discovered was a faulty check valve.  This would explain the hard starts,
> but the mixture, which was within spec. is still really rich.  I was also
> told the turbo was very weak and only putting out a few pounds of
> pressure, although I am getting about 1.3 bar and plenty of power up
> around 3-3.5K rpm.
> Presently the cold start valve is not connected because it needs
> to be replaced and I do not have a problem starting the car without it
> when cold.  If the car sits for any longer than 15 minutes after driving
> it will not start for up to an hour.  There is a really strong smell of
> gas if I try starting at this point.  Once I finally get it to start I
> cannot do so without having my foot floored on the gas, what that does I
> don't know.  Once it starts it will not idle smoothly unless I have my
> foot on the gas.  I have changed the roter, cap, wires, and switched the
> pulgs from the bosch platinum that were in it to NGK tri-electrodes.
> This is the only problem I have been having with this car, and I
> love it.  If anyone could help me out with any ideas that would be great.
> I am not in a position to get rid of it and I know if I do I will hate
> myself for a while.
> I am sick of smoking people out from a stop with all the black
> smoke and god only knows what harm I am doing by continuing to drive it in
> this condition, other than making a hole in my pocket for 20 gallons every
> four days or about 300+ miles.
>
> TIA,
> Nate Brown
>
> 86 5kstq
>

Hi Nate;

    I don't claim any expertise on the CIS system, but I'll inflict my
speculations on you anyway....
    Pull the trouble codes from the ECU to see if any codes have been set
(O2 sensor, etc.)
    The no-restart after 15 minutes accompanied by the strong gas smell
sounds like a leaking injector(s) is flooding the engine. Run it, let it sit
for 15 minutes, and pull the plugs. Look through the plug holes for evidence
of gas on the piston tops. Some listers have inserted Q-tips or a reasonable
facsimile to see if gas is on the piston. Please note at this point that it
is a bad idea to lose something in the engine while swabbing your piston
tops.
    The CIS system feeds fuel continuously through the injectors. The fuel
pools behind the intake vavle until the valve opens. If the engine is
running rich, too much fuel is being fed. This can be caused by a multitude
of problems, including but not limited to a bad fuel pressure regulator/
improper fuel pump (too much pressure), a bad fuel distributor, faulty ECU,
bad O2 sensor, etc.
    We have several listers who know these systems inside-out. Hopefully
they can provide you with more info.

Fred Munro
'91 200q  272k km