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1979 Mazda RX7 engine backfire

Tiny
COW
  • MEMBER
  • 1979 MAZDA RX7
  • 4 CYL
  • 2WD
  • MANUAL
  • 75,844 MILES
I drove my car yesterday and it worked fine. Today it starts and revs but if I go pass half throttle the car backfires. I tried to drive and on accelaration it stutters and backfires. I had a new exhaust system installed a week ago I reved the car when I got back and a piece of the catilyst came through the tail pipe.
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Thursday, December 6th, 2007 AT 10:24 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
How much of the exhaust system did they replace? If they left the same muffler, it could be plugged up with the guts from the cat converter. This will cause both things you describe
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Friday, December 7th, 2007 AT 2:40 PM

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