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Idle Question

jamraw
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

Featured Replies

I have a 92 Legacy AWD with 175000 miles on it. Great Car!

Something I've noticed is if you pump the brakes a couple times at idle the engine surges almost to a stall then speeds up. Bad Booster? Vacuum leak? Also it seems to run rough with the ac on. Compressor seems to run smooth. Smooth idle in park with no load. What do you think? Thanks! Jim

Pumping the brakes several times in a row will use engine vacuum. The idle will fluctuate some, but it shouldn't stall.

 

It sounds like your idle air control valve may be sticking or not performing at its peak. You can try squirting some brake cleaner in the IAC tube. It may help....it may not.

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