I AM MECHANICALLY INCLINED AND HAVE NEVER SEEN A...

  • Tiny
  • glock_45
  • 1994 Buick Century
  • 112,000 miles

I am mechanically inclined and have never seen a problem like this, When driving normally (55-60)mph and you step on the brakes, the car backfires. And when it is just sitting and running, if I hold the gas pedal down lightly and put on the brakes, the idle decreases, and increases when I take my foot off the brake. There are no lights or codes for anything, including the ABS. I have seached for vacuum leaks, bad wires, hoses ect, I have disconnectes the vacuum hose from the brake booster and plugged it and it still did the same thing. I have no idea where to go from here. Any Ideas?
Thanks, Tom

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Friday, January 25th, 2013 AT 12:33 AM

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  • Tiny
  • saturntech9
  • Expert
  • 29,884 posts

Have you checked the alternator yet?Also maybe the brake lights have a bad ground and stealing ground from another circuit?

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Friday, January 25th, 2013 AT 8:06 AM

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