Still need help
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Freshman User
Joined: Nov 2006
Posts: 46
Likes: 0
From: Central Illinois
Still need help
when me and my friend started working on the truck last night, we got it timed and then messed with the carb for a bit, but he wanted me to check my spark plugs so i looked at them, they looked good, but one broke on me when i was taking it off. going to buy new ones today, they were champions going to put motorcraft on them. But it still seems to spudder a bit, was wondering if it could have been a broken spark plug a long time ago. well any feed back would be great. O and again 1979 f150 4x4 with 300 I6 offy intake, 500 CFM eldebrock, and an rv cam.
Thanks
Thanks
Thread Starter
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Freshman User
Joined: Nov 2006
Posts: 46
Likes: 0
From: Central Illinois
haven't replaced the plugs yet am going to tonight. I was just wondering if you guys thought it was the plugs or something different. My friend said a burnt valve, but how do you tell if you got one of them
Postmaster
Joined: Jul 2001
Posts: 4,956
Likes: 10
From: MD
Use a vacuum gauge to find out if you have a burnt valve...or two.
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Elder User
Joined: Dec 2007
Posts: 813
Likes: 6
From: Up Nort Minnesota
how's the rest of your ignition system? cap, rotor, wires?
My 77 came to me much as other old pickups have come to me, with the original 1977 plug wires still on the truck. printed right on the wires "1977"
if you popped the hood at night in the dark with the engine runng it looked like a lighting storm in the engine compartment.
frickin sparks shooting all over the place from all the wires.
My 77 came to me much as other old pickups have come to me, with the original 1977 plug wires still on the truck. printed right on the wires "1977"
if you popped the hood at night in the dark with the engine runng it looked like a lighting storm in the engine compartment.
frickin sparks shooting all over the place from all the wires.
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Thread Starter
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Freshman User
Joined: Nov 2006
Posts: 46
Likes: 0
From: Central Illinois
it is a new cap and rotor, and wire set, when using the vacume gauge what am i looking for will there not be any vacume at all or will it be really low.
also when it spudders it is like i lose all power just when i shift into forth gear, in 3rd and 2nd gear it really wants to go, i have had someone say that it could be 4th gear is out well it just started doing it when i put a new eldebrock 500 on had a 390 holley on before that and it didn't do it.
thanks for all the help guys
also when it spudders it is like i lose all power just when i shift into forth gear, in 3rd and 2nd gear it really wants to go, i have had someone say that it could be 4th gear is out well it just started doing it when i put a new eldebrock 500 on had a 390 holley on before that and it didn't do it.
thanks for all the help guys