Oof
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Tuned
Joined: May 2006
Posts: 304
Likes: 77
From: St Paul MN
Oof
1979 F250 400 4x4 C6 was running so good. I got a wild hare and decided to enter it in the county fair truck pull. Fabbed up a hitch, was on my way to wash the truck and go and pay my entry fee and loss of power 1-1/2 hours before the registration going down a road 55 mph.
Limped It on the shoulder to a gas station a mile down the road.
Temp ok. Oil pressure ok. Wont go more than 2 mph, dies constantly.
No fuel in clear filter, some bubbles coming through it when the truck was off, maybe boiling? Topped it off with gas, wondering if I vapor locked it.
It was like 95 degrees out.
Messed with it for an hour. Got fuel in the bowl again but it doesn't do anything but idle bad now, no power at all.
I am thinking it maybe took the coil out? Let it cool down for a couple hours and tried again but no luck.
Idles poor, backfires when I give it any fuel.
Will check the spark when I got time.
Monday the guys will be like - how did the pull go, and hopefully I don't have to tell them my truck blew up on the way to the pull. Shoot.
Limped It on the shoulder to a gas station a mile down the road.
Temp ok. Oil pressure ok. Wont go more than 2 mph, dies constantly.
No fuel in clear filter, some bubbles coming through it when the truck was off, maybe boiling? Topped it off with gas, wondering if I vapor locked it.
It was like 95 degrees out.
Messed with it for an hour. Got fuel in the bowl again but it doesn't do anything but idle bad now, no power at all.
I am thinking it maybe took the coil out? Let it cool down for a couple hours and tried again but no luck.
Idles poor, backfires when I give it any fuel.
Will check the spark when I got time.
Monday the guys will be like - how did the pull go, and hopefully I don't have to tell them my truck blew up on the way to the pull. Shoot.
More Turbo
Joined: Mar 2022
Posts: 688
Likes: 210
clogged fuel system/carb? crack in vacuum cap/hose?
I did an oil change in a mercedes 85 380sl and ran like crap after. Couldn't understand how an oil change would affect starting/idle. I changed the fuel filter w/ no difference.
happened to take off the air cleaner one day and noticed that a 3 way vacuum "Y" had somehow come undone from all 3 hoses going into it. not sure how this came undone during a routine oil change.
plugged it back in and ran like a top.
I did an oil change in a mercedes 85 380sl and ran like crap after. Couldn't understand how an oil change would affect starting/idle. I changed the fuel filter w/ no difference.
happened to take off the air cleaner one day and noticed that a 3 way vacuum "Y" had somehow come undone from all 3 hoses going into it. not sure how this came undone during a routine oil change.
plugged it back in and ran like a top.
FTE Legend
Joined: Nov 2015
Posts: 30,831
Likes: 4,096
From: Angier, NC
I was thinking the same thing.
How many miles on the chain?
Pull #1 plug and crank it with finger overe plug hole till it gets pushed off.
Turn the motor by hand to TDC and pop the dist. cap where is the rotor pointing?
If not at #1 or even 180 off the chain jumped.
Maybe the dist. hold down came loos and the dist. turned if you are lucky.
Dave ----
How many miles on the chain?
Pull #1 plug and crank it with finger overe plug hole till it gets pushed off.
Turn the motor by hand to TDC and pop the dist. cap where is the rotor pointing?
If not at #1 or even 180 off the chain jumped.
Maybe the dist. hold down came loos and the dist. turned if you are lucky.
Dave ----
More Turbo
Joined: Oct 2015
Posts: 638
Likes: 36
From: Southwest Missouri
ICM can act weird up to the moment it finally dies. Heat eventually cooks all of them. Some will kinda work after they cool off, but once they start to go they have to be replaced. Most Autozone locations have a machine to test the ICM for you.
If you are gonna keep the stock duraspark setup, always keep a spare ICM in the truck and get NOS if possible. The aftermarket replacements are trash.
If you are gonna keep the stock duraspark setup, always keep a spare ICM in the truck and get NOS if possible. The aftermarket replacements are trash.
Tuned
Joined: Jan 2021
Posts: 254
Likes: 103
From: Longview Texas
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Tuned
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From: St Paul MN
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Joined: Oct 2006
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From: East Central Ia
3 times in my life, 1 was chunk of nylon timing chain. 2 was bought 77 T-bird from salvage yard that had fresh ignition parts and forgot roll pin under in star wheel, big backfires. 3 was 1 strand of wire brush sucked up in oil pump. 1st time it took teeth off distributor gear and camshaft. Bad things happen at the worst times.
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