Pumping brakes at idle changes AFR????
07-05-2008 | 01:18 PM
#1
Thread Starter
Racer
Joined: Jun 2002
Posts: 251
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From: manchester, NH
Pumping brakes at idle changes AFR????
Why would pumping the brake pedal at idle progressively make the AFR chanke from 12.5 to 15.5 with 3-5 pumps of pedal? Vacuum leak?? Voltage change?? Any ideas and the engine was up to operating temp no problem.
Thanks
Brian
Thanks
Brian
07-06-2008 | 02:33 AM
#4
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Rennlist Member
Joined: May 2002
Posts: 3,649
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From: Phoenix, AZ - NJ Runaway
Most likely your main ground cable is in need of replacement. If the car isn't stumbling when it happens then it's electrical. Start by going over all your ground cables and points.