backfires when trying to start
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Joined: Dec 2003
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backfires when trying to start
About 2 years ago I inherited a 1966 F-100 and although I have become very good on the mechanical end my diagnostics skills are not good at all so I would appreciate some help. 2 days ago I was driving down the road and all of a sudden the truck cut out on me and let out a massive backfire so I rolled to the side of the road and when I tried to restart the truck all it would do is backfire every now and again. I put a new 1976 351w inside shortly after I received the truck and it has ran great ever since until now. Any help would be appreciated.
Posting Guru
Joined: Nov 2003
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From: East Flat Rock NC
Sounds like the timing check to see if the rotor is turning if it is not it could be the gear pin is sheared then it also could be the timing chain . One other thing that comes to mind is the fuel pump i have had alot of fuel pumps go bad on my 351ws i just got a holley works great.
Elder User
Joined: Nov 2003
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Don't think I'm stupid but did you check the points? Same happened on mine and I put a resistor in line to the hot side of points. That stopped the burned up points all the time. Still keep a fresh set in the glove box.
Dave
Dave
Posting Guru
Joined: Jul 2003
Posts: 2,222
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From: East Central Florida
To add to Instg8r63,
"I would get the timing mark to 0 degrees, pop the dist. cap and see where the rotor is pointing."
-> also make sure piston in #1 Cylinder is at Top Of stroke or TDC when rotor is @ #1 position, if not I'd go after the timimg gears.
FBp
"I would get the timing mark to 0 degrees, pop the dist. cap and see where the rotor is pointing."
-> also make sure piston in #1 Cylinder is at Top Of stroke or TDC when rotor is @ #1 position, if not I'd go after the timimg gears.
FBp
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