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Date: Tue, 3 Dec 2002 13:15:41 -0500
From: "JEAN PAUL LE GUEN" <LEGUENnopsamORLD.NET>
Subject: Re: 1995 NG 900S 2.3NA AT - Idle hunting
Hello Andrew,
I am sorry I do not have a good answer for you ,but have two Saabs that do
the same thing. On my 89 9000 2.0 na I did every thing you did and it did
not get any better, the only thing that helped some was that on the carbon
canister is a electric valve powered from the fuel pump relay. the valve was
always ticking, which open and closes loosing vacuum from the intake. The
ground wire is tied to the ECU. It would loose or open it ground. I never
could find out why, so I cut the wire and ran it to a ground. It help the
idle some, the valve would stay closed will running and open when the fuel
pump was not running. I not telling you to do that, and maybe someone can
answer why it opens and closes so much. But on my 94 9000 cse 2.3 turbo it
started to do the same thing. But on it I found a small fuel leak, well
maybe just moisture on the joint on the return line near the firewall a foot
after the fuel pressure regulator, where it goes from rubber to plastic
there is a clamp I tighten, it seems to idle better not 100% and also
respond better.
Good Luck,
Jean Paul
"andrewunix" <agreenbunopsamnet> wrote in message
news:slrnaupkof.q0d.agreenbunopsam.nyx.net...
> This one's still got me scratching my head.
>
> The car runs fine for the most part, but the idle hunts, particularly in
> cold weather or with the A/C running.
>
> I can't find any vacuum leaks.
>
> I've tried swapping out: Idle Control valve, distributor, spark plug
> wires, oxygen sensor, and even the engine management computer (bosch
> motronic).
>
> Nothing seems to help with this particular problem.
>
> The overall idle seems a little low, which I would think would indicate a
> vacuum leak somewhere, but I've replaced all of the vacuum hose in the car
> with no results.
>
> Car is an automatic, and it surges pretty badly when first put into Drive
> or Reverse.
>
> Sometimes when I'm driving I smell fuel coming through the ventilation
> system.
>
> Gas mileage in city conditions is pretty poor (16-18 mpg).
>
> Any ideas?
>
> --
> agreenbu Return to Main Index
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