ignition or fuel? help!
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ignition or fuel? help!
79 Bronco with a fresh 400...I have replaced everything imaginable on my truck,fresh motor carb manifold headers alt, coil, ignition,you name it, but I am still baffled by this problem.towards the end of last summer I was getting a stutter while in drive idling, like at a stop light. I could watch my tach, and feel the thing jumping,and eventually,this problem got worse and worse until it would just stall with no warning while idleing. then, I could crank it and crank it, and no start, and then eventually, it would start. I eventually gave it to an electrical guy,who couldn't find a problem cuz we all know, that when your trying to find it, it doesn't show up. he eventually concluded that it was the ignition & replaced that. Right about then, its getting cold,and the problem seems to disapear all winter long. now the weather is getting warm again,and the problem is back. So,..I'm lost, don't know if the weather is the factor somehow, or i'm imagining it....or is the 1 yearold ignition already shot? can anyone help?
Mountain Pass
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From: covington
ignition or fuel? help!
Sounds like you may have a vapor lock problem when it gets warm out. Check your fuel lines and make sure they are away from the exhaust and other sources of heat. I have also seen intakes heat the carb enough that it vaporizes the fuel in the fuel bowl. These tend to occur at idle more than at part throttle because the fuel doesn't move in the supply fast enough to keep it cool at idle. Just a thought.
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ignition or fuel? help!
Originally posted by jeep8589
Sounds like you may have a vapor lock problem when it gets warm out. Check your fuel lines and make sure they are away from the exhaust and other sources of heat. I have also seen intakes heat the carb enough that it vaporizes the fuel in the fuel bowl. These tend to occur at idle more than at part throttle because the fuel doesn't move in the supply fast enough to keep it cool at idle. Just a thought.
Sounds like you may have a vapor lock problem when it gets warm out. Check your fuel lines and make sure they are away from the exhaust and other sources of heat. I have also seen intakes heat the carb enough that it vaporizes the fuel in the fuel bowl. These tend to occur at idle more than at part throttle because the fuel doesn't move in the supply fast enough to keep it cool at idle. Just a thought.
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