400 starting issues
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Junior User
Joined: Dec 2003
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From: Kalispell,Montana
400 starting issues
Hey everyone! I 've got a 79 3/4 ton 2wd 400 ci. In the past month or so I've put an edelbrock manifold and carb on the truck and also replaced the lifters at the time.Since then when the truck gets warm to hot it barely cranks over,been all over the scale with the timing and nothing seems to correct this. Wednesday the wife was driving it and while picking up the kids from school she shut it off,and it wouldn't crank at all after that.After work I went over and had to hook up jumper cables and a jump box just to get it to turn over,and after it finally fired it sounded like the valves wanted to jump out of the head.Been so busy at work haven't had a chance to look at anything and wanted to get some ideas. Is this a timing chain issue? I'd lean towards starter or solenoid with the starting issue,but the clacking noise after it does start leans towards timing or valve issues.The noise doesn't go away moving the dist,but does quiet down.Any thoughts? Thanks,John
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The problem is usually timing. A LOT of trucks have this problem.
Cold starts are great >>>> Hot starts suck.
Trucks with headers cause problems for the starter by over-heating them so much the starter drive won't engage.
How many miles on this engine ?
The plastic gear wears out at about 110,000-120,000 miles.
Check the timimg gear & chain for slop.
Cold starts are great >>>> Hot starts suck.
Trucks with headers cause problems for the starter by over-heating them so much the starter drive won't engage.
How many miles on this engine ?
The plastic gear wears out at about 110,000-120,000 miles.
Check the timimg gear & chain for slop.
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Yes they are.
What EXACT condition is your battery & all the connections in ?
The heat of the starter can affect the qualities (expansion/contraction) in the electrical function of the starter drive.
I notice mine in the heat of the summer... 29*C +
What EXACT condition is your battery & all the connections in ?
The heat of the starter can affect the qualities (expansion/contraction) in the electrical function of the starter drive.
I notice mine in the heat of the summer... 29*C +
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Junior User
Joined: Dec 2003
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From: Kalispell,Montana
Although it's no gaurantee,the battery and all cables are less than 4 months old.the problem only started after the manifold change out.The very loud clacking noise concerns me after it's running.
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Junior User
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From: Kalispell,Montana
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Clacking sound some around the starter is the starter drive (bendix) is hanging up and allowing the flexplate to hit it.
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Junior User
Joined: Dec 2003
Posts: 85
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From: Kalispell,Montana
I wondered,think I live right down from you.Yeah I used Clevite lifters against my better judgement,probably be down to see you at the store next weekend.Gonna put a new starter in tomorrow,see if it turns over at least.
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