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Fast Idle
Posted by Joe Krepps (more from Joe Krepps) on Tue, 28 Nov 2000 13:06:13
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00

Fellow SAABernuats,

Recently, after much cooler weather + the replacement of; throttle
dashpot, plugs/cap&rotor, air mass meter, fuel pump, ECU, fuel filter my
'87 9kT's idle has risen from it's usual ~1,000RPM to ~1,600RPM. (all
those parts except the plugs/cap&rotor were used, BTW) It starts from
cold and idles at 1k but rises to 1.6k in a few minutes.
Once in a while, it returns to 1k while driving but not very often. The
good news is there's enough oil pressure to keep the chain and lifters
from chattering. The bad news is (and this might be coincidental) gas
mileage is down and it just doesn't feel happy being shut off at the
higher RPMs. I give it a little extra spool down time juuuuuust in case.
I can force the idle to drop by working the motor against the clutch
with the parking brake pulled but that can't be a good thing. I drive
~16,500 miles/year and run 92 octane as often as possible(affordable!).
I skimmed the archives for 'fast idle' but they were 900 owners. Ideas?
AIC valve whacked? (How d'ya unplug those connectors anyway?)

Safe flying,
Joe Krepps
'87 9000 Turbo, 217.5k, original turbo & chain
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