High rpms low speed spitting and sputtering

Asked by Jul 04, 2016 at 04:31 PM about the 1992 Subaru Legacy 4 Dr L Sedan

Question type: Maintenance & Repair

After I shift gears rpms rise like it wants me in 3
gear @ 20 mph spits and sputters or stalls out

1 Answer

6,535

hmmm... I wonder if it could be idle air control related. I imagine yours has one. They usually fail shut and stall or stick open/close/open/close and it sounds like you're revving your engine at stops.. It could honestly be a number of things I guess. If that IAC is sticking open, it would allow air into the airstream to bypass the throttle (your foot) and allow it to jump up in rpm. That's an idea anyway.

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