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timing issues?

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Old May 21, 2010 | 04:44 PM
  #1  
'74390's Avatar
'74390
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From: Jacksonville
timing issues?

my '74 390 is having issues, when i go from idle to putting my foot on the floor.
it'll sputter and shut off, or i have to let off and let the ignition catch up.
got no idea what to do, help would be greatly appreciated.
 
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Old May 21, 2010 | 08:14 PM
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Does this happen while driving, parked or both? How is the idle and have you put a timing lite on it? I have a similar problem with mine but I think mine is fuel issue.
 
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Old May 21, 2010 | 08:19 PM
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From: Mad City
I think I've got similar issues: What type of ignition system do you have in it? Carbs? I'm putting in an HEI system. If you can wait a week or so (waiting for parts) I can keep you posted.
 
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Old May 21, 2010 | 08:56 PM
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Look at 76bigblocks post here "backfiring through the carb" This may shed some lite on your problem. I'm guessing you also have a fuel issue going on. JMO.
 
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Old May 22, 2010 | 05:35 PM
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'74390
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i have not put a timing light on it and it is backfiring through the carb
it's got a stock magnetic distributer

and ill take a look at the '76 post.
 
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Old May 22, 2010 | 05:54 PM
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'74390
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what he's talking about in that post is exactly what my truck is doing.
but they think it could be a flat knuckle on the camshaft,
i have a brand new one that my dad bought for his 390 that he never used and gave to me if i needed it.
if it comes to swapping it ive got a set of lifters too. but i dont want to have to do that.
 
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