Slight high speed miss Ok, so my 30 coupe starts very easily and runs smooth until I reach road speed, about 45 mph. At that time it seems to develop a slight miss.I have the more modern points set up installed, timing is set with a light, point gap is set with a dial indicator, spark plug gap is correct and the plugs look good. What should I be checking next? Thanks
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Re: Slight high speed miss How does it change with changes in fuel adjustment or spark lever settings ?
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Re: Slight high speed miss If you have a modern wireless lower plate installed in the distributor check to see if there is a burn mark on the slider at the position you have the spark advance set to when traveling at 45 mph.
Tom Endy |
Re: Slight high speed miss The GAV nor the spark lever position seem to have any effect on it. When I say "slight" miss I mean you really have to pay attention to notice it but it is there.
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Re: Slight high speed miss Thanks I will have a look for that. What would cause the burn mark if it is there?
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Re: Slight high speed miss Loosen your gas cap and go for a drive. I had a slight miss at or above 55, I removed the cap and then no miss, even up to 70, the cruise control then said SO DOWN ! Guess who that was :-)
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Re: Slight high speed miss Quote:
Tom made a great point. The wireless plates are kinda famous for that. They tend to lose contact. A wired plate or adding a wire will correct that. |
Re: Slight high speed miss Put some marvel mystery oil in the gas. ATF works too.
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Re: Slight high speed miss Quote:
X2. Personal experience, had Nu Rex wireless plates, after a while had some odd issues including the original poster's issue. Spent weeks tracking it down. Tried a jumper for troubleshooting which cured the issues. Went back to non wireless, no more problems. |
Re: Slight high speed miss Check your points. Open them up slightly.
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Re: Slight high speed miss Check ferrule at end of fuel line. Must right at end of tube. Tube hits screen and restricts flow.
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Re: Slight high speed miss "Slight high speed miss", same thing my cardiologist told me... HUH!
Couldn't resist... Chap |
Re: Slight high speed miss Close the plug gap slightly, say to .025", and go for a test drive. This will tell you if it a weak spark, or not. I sincerely doubt it is a fuel problem. Good luck!
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