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Registered
Join Date: Jul 2004
Posts: 28
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Backfire solution?
I have been experiencing fairly aggressive backfiring upon decelration. Car is fine at idle and under acceleration.
I assumed that it was either or a combination of too rich a mixture and/or an exhaust problem. My unscientific tests of putting my foot over the exhaust and the car gasping for air but not stalling and looking at how black the exhaust smoke was seemed to confirm it is a little of both. Then someone casually suggested that it could also be a bad selenoid (part #51 from the Early Porsche 911 Fuel Injection exploded diagram). I disconnected this part and......no backfires. It stalls at idle sometimes but no backfires. What does this selenoid do? Why would it fix the problem? Is this a viable long term fix or should I replace it? (I will address the rich mixture and exhaust problem but I am trying to understand what/how this "fix" "solved" if anything) It's a '70 engine with Zenith carbs. Thanks Eric |
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Registered
Join Date: Jul 2004
Posts: 28
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bump
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Registered
Join Date: Aug 2001
Location: Melbourne Australia
Posts: 456
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This may help, I had the same issue that was cured when I replaced the after market chip with one from Steve Wong.
No more back firing.
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David Cayenne Turbo - Cargraphic Stage 2 Power kit, lowering module 997 C4 Cabriolet - Basalt Black 86 Turbo Body 911 Cab - Many Mods Gone and Missed: 97 993TT: PSS9, CarGraphic Exhaust |
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