1999 9-3 Viggen CEL, Occasional Random Stalling - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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1999 9-3 Viggen CEL, Occasional Random Stalling
Posted by Chris Maguire [Email] (more from Chris Maguire) on Tue, 24 Jul 2018 10:42:45
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Hi all! '99 Viggen with 208,000 miles. Recurring CEL with the following codes:
P0300 - random misfire
P1171 - closed loop, lean mixture (or Lambda control - lean)
The car stalls occasionally when I depress the clutch when rolling to a stop, especially after spirited driving.
Replaced plugs, replaced crank position sensor, cleaned MAF, replaced vac lines. No dice.
Time for a DIC replacement? I'm the original owner and replaced the DIC once before at about 70,000 miles after a no-start condition. The car starts fine now and always restarts after stalling.
The P1171 (closed loop, lean) is what's throwing me. I don't want to replace the DIC and then find that the real problem was related to fuel delivery (faulty fuel pump, maybe?).
Greatly appreciate any suggestions! I searched the boards but folks with these codes also had O2 sensor faults, which I don't have.
Thanks so much!
Chris
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