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Old 08-04-2006, 04:49   #1 (permalink)
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Question 302 Windsor Miss & Backfire

have F150 with 302 windsor that has a miss at idle and at low revs, Running on Dual fuel Compression test has been done, new dizzy cap, rotor button and leads, timing has also been checked.
When running on Gas has backfire under load.
Any help would be appreciated
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Old 08-04-2006, 18:37   #2 (permalink)
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Re: 302 Windsor Miss & Backfire

backfires under load usually indicate a lean condition. I'm not an expert on LPG but perhaps get that checked out.

Also LPG is renowned for burning out the coils on these EFI Windsors (due to the extra load put on them)
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Old 08-07-2006, 08:37   #3 (permalink)
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Re: 302 Windsor Miss & Backfire

if not a new conversion, my very first port of call would be the diaphragm in the converter.

PS....backfire from the exhaust is RICH....unburnt fuel exploding in the mufflers, backfire through induction system is incorrect timing, or sequence (i.e 1 or more leads on the wrong plug)

Cheers
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