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backfiring problem!!!help

   
Old Jan 19, 2009 | 02:44 PM
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s2queen
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From: Saffron Walden
Default backfiring problem!!!help
hopefully some one here can help,ive got a serious backfiring problem going on with my s2 turbo,recently had engine rebuild but was misfiring,changed the spark plugs and set gap to 30thou and now its deciding to backfire but only from 3rd gear upwards and when you boost,it also cuts out whole engine whilst driving for a few secs...anyone got any advice the only thing i cant hink off is maybe the gapping?????
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Old Jan 19, 2009 | 05:15 PM
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I would start at basics like timing for one, then check CO.
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Old Jan 19, 2009 | 08:32 PM
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From: West Mids
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Is it chipped? Sounds more like the engine is overboosting and it is cutting your ignition, this means neat fuel enters the hot exhaust causing the backfire.
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Old Jan 19, 2009 | 08:35 PM
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def overboosting, lower boost and try again, my old one was the same.
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Old Jan 20, 2009 | 09:01 AM
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s2queen
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From: Saffron Walden
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yeah its been chipped,a lot o people have said it could be overboost,but im only running on 10 psi at the mo..would that make a difference??
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