Won't turn over when hot

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Sep 28, 2015 | 12:08 PM

Phreshprince

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Won't turn over when hot

Okay I have a 78 fwd f150. Has a 429 out of a 69 tbird.the truck has sat for a while and then I bought it. It had a 2 barrel carb on it so I swapped it back over to a 4 barrel. I noticed when I would try to crank is it would sorta lug getting started and once did. It didn't sound very healthy. So I did a full tune up since it hasn't had one from the 90s. I also advanced the timing a hair. It Cranks up, idles nicely, sounds good, pulls and drives just fine. Sometimes when cutting off though it would keep trying to stay started for a few seconds. Then shut off. I may have that fixed now but when the truck warms up and I shut it off and go to turn it back on it lugs like it doesn't want to start then after it sits for a few minutes it fires right up. Bad starter? Carb out of tune? Carb getting to much gas/air? Loose ground? Please help

Sep 28, 2015 | 07:31 PM

fuzzybob

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Joined: Sep 2013

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From: Deer park, Wa.

Might have to back the timing off a little. If the 429 is stock it'll have close to 11 to 1 comp. Use the high dollar gas and look out for detonation.

Sep 28, 2015 | 10:12 PM

85e150

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Joined: Apr 2004

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Are you cooking the starter with headers or header pipe?

Check your connections and ground lead etc, make sure something isn't loose or corroded.

Sep 30, 2015 | 08:18 AM

jas88

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Joined: Feb 2002

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From: Greater Austin, Texas

It's either a bad starter or too much initial timing. To tell the diff, next time it doesn't want to start, pull the coil wire off and see if it will then spin over fine. If so, timing. If not, starter.