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Jul 18, 2012 15:21:43 GMT
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What causes a carb to backfire? Its shooting out little jets after revving the car up the exhaust occasionally fires too. Ive played about with the timing, could it be something to do with float chamber not having enough fuel?
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Carb backfiring BenzBoy
@benzboy
Club Retro Rides Member 7
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Jul 18, 2012 15:25:25 GMT
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I've always been under the impression that spitting back through the carb means you have a lean mixture. Does it do it when thoroughly warmed up? What carb / engine is it?  |
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Jul 18, 2012 15:31:57 GMT
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Its a BMW E21 320/6, solex 4A1 carb and it does it while warmed up and cold, it didnt do it before I rebuilt the carb. All that's changed is the float doesn't allow as much fuel in the chamber as the carb was flooding and the top of the coil plastics snapped off when I accidental leant on it  but the HT lead still seems to make a good connection. |
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Last Edit: Jul 18, 2012 15:32:51 GMT by mgbizzle
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v8ian
Posted a lot
Posts: 3,763
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Jul 18, 2012 16:44:47 GMT
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Mixture, ignition timing, ignition leads on incorrectly, burnt valves, probably many more too that I cant think of at the moment,
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style.
Austin A35van, very different------- but still doing it in style, going to be a funmoble
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Jul 18, 2012 17:13:58 GMT
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ignition timing, ignition leads on incorrectly ^ Very much this. |
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tome30
Posted a lot
Posts: 1,001
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Jul 19, 2012 21:55:00 GMT
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You have an E21 that spits flames!!!! Problem?
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Jul 19, 2012 22:20:10 GMT
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"Fire breathing monster" ;D
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but the HT lead still seems to make a good connection.
