351C chokes at wide open throttle!! - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-18-2004, 01:41 AM
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351C chokes at wide open throttle!!

ok.....i have a 351C 2V......i advanced the timing from 6 to around 10 and i dont have any problems until wide open throttle.....it starts to choke or stutter.......i have my vaccuum advance hooked up too......could that be it?.....or could i be too lean on the air/fuel mixture??.......any help would be appreciated.

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Old 03-18-2004, 01:48 AM
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here`s a few things to check over. First off, do a spark test, if the spark is yellow, it`s weak, secondly, do a plug chop, run it at wide open throttle until it starts to choke, take your foot off the pedal and kill the ignition (but don`t lock the steering wheel) coast to the side of the road and pull a few plugs, if there white it means it`s dead lean, could be caused by low float level, lack of fuel pressure or bad fuel pump, possibly a clogged fuel filter.
If the plugs are wet and black, then it`s getting too much fuel, make sure the choke isn`t closing and check the fuel pressure.
However, if it ran okay before you advanced the timing, then I would go back 2 degree`s at a time until the problem stopped and leave it set there. vacuum drops to zero at WOT, so the vacuum advance isn`t in operation.
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