Question about 1992 Honda Accord
I recently change the brakemaster cylinder on my '92 accord and now the engine revs up to 2k rpm then down to 700 rpm during idle. I dont have a clue on what to do and I really dont want to pay a schmuck to fix it if I can do it myself.
Well I know that on some vehicles, a vacuum leak will cause this. Since you have a vacuum line going into the brake booster and you might need to remove it to get the the Master Cylinder, it could have cracked, broke, or got pulled out and not back in. A vacuum leak will will result in un-metered air,so now you have a lean mix in the intake. The O2 Sensor will sense this after the burn and try to compensate to bring the emissions back into spec. The computer will try to adjust the RPM to see if it can get it under control. Once it does it relaxes thinking the problem is solved, RPMs drop and it tries to compensate again.
Check for a Vacuum leak, thats my recommendation.
Posted on Jan 20, 2009
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