351m missing

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Dec 2, 2007 | 08:33 PM

78 ford f150

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351m missing

i just rebuilt my engine and it is missing while driving ,but it doesnt miss at idle or even when i rev it up all the way through the rpms any suggestions would be helpful

Dec 3, 2007 | 01:00 AM

Mil1ion

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check the sparkplug wires at night in the dark to see if they are crossfiring or shorting out.

Dec 7, 2007 | 07:54 PM

78 ford f150

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i tried that and didnt see any spark coming off any where

Dec 8, 2007 | 10:21 AM

78ford351m

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Check firing order and timing. Sounds like timing if the plugs are new and firing order is correct. did you replace wires, cap, rotor, etc?

Dec 8, 2007 | 12:11 PM

78 ford f150

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what should the timing be set it has new wires plugs cap and rotor

Dec 8, 2007 | 12:27 PM

1EVILCREWCAB

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From: ontario canada

check that #5 and # 6 wires aren't mixed up, if they are it will miss under load on #6 cylinder and detonate on #5 but will idle fine and rev up fine

Dec 8, 2007 | 01:44 PM

Mil1ion

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http://boxwrench.net/specs/ford_351C.htm

quote:what should the timing be set it has new wires plugs cap and rotor

It depends which application you have.

Is there a white sticker on the valve cover ?