jamraw Posted June 25, 2006 Share Posted June 25, 2006 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 Link to comment Share on other sites More sharing options...
Legacy777 Posted June 25, 2006 Share Posted June 25, 2006 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. Link to comment Share on other sites More sharing options...
nipper Posted June 25, 2006 Share Posted June 25, 2006 IAC is not working right. nipper Link to comment Share on other sites More sharing options...
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