87 SILVERADO WITH AN 78 350 BORD 40 OVER WILL NOT STAY RUNNING AFTER SEAFOM

[REBEL RAIDERS]

my truck is an 1987 Chevy Silverado 350 but has a 1978 350 camper special motor in it and i ran seafoam through it and ever since it does not want to run right or stay running while driving
list of what I've already did
new carburetor new distributor new plugs wires, plugs, fuel line, fuel filter, new fuel pump on the side of the block, reset timing

 

[Rickf]

How did it run before seafoam treatment? Did you add the seafoam to the tank or dump it down the carb and how much?

 

[REBEL RAIDERS]

RICKF IT WAS RUNNIG JUST FINE NO ISSUE AT ALL THEN ONE DAY I STOP AT MY LOCAL WALMART FOR GAS LIKE NORMALE I DECIDED TO RUN A CAN THROUGH AND ITS BEEN LKE THIS SINCE EVEN WITH NEW FUELIT WAS PUT IN THE FUEL AND A BOTTLE BECAUSE MY TANKS ARE THE 20 GALLONS

 

[fast 99]

Might have dislodged a piece of crud into a carb circuit.

Were those parts installed before or after the problem?

What carb, what speed? Description is somewhat vague.

 

[Rickf]

Ease up on the all caps.

 

[REBEL RAIDERS]

the caps is from the key board screwing up and all parts are after the issue and is still doing it
carb is a Holley 650 it varys on speed i get about a block or block and a half befoe it just dies or acts like it getting to much air it like when i first try to take off it hesitates and then will go but after your driving it just shuts off

 

[fast 99]

Check fuel pressure and volume. Lots of poor-quality pumps out there.

 

[REBEL RAIDERS]

do i just put one of those clear fuel filters by the carb and see how much come in while running

 

[fast 99]

Need an actual number, carb performance [fuel level] depends on correct fuel pressure and adequate volume. Low pressure/volume engine runs out of fuel/lean. High pressure carb can't hold it back, overflows or runs rich. Some part stores have loaner tools.

 

[REBEL RAIDERS]

ok i know the carb is a Holley street warrior 600 cfm 4160 part#080457s
fuel pump is part # m16043
fuel filter is part#33481
fuel line is off amazon its a 3/8 metal

 

[REBEL RAIDERS]

update yesterday i went out and fully reset timing to where it will idle and let it warm up to were i could work on the fuel mixture i got that far enough to where i can put it gear now with out it dyeing out. now when im driving im having to keep my foot on throttle but it will die eventually at a stop light and after my drive i shut it off and it tried to diesel a little bit

 

[Grit dog]

And all $800 worth of parts after a can of season in the gas….
It ain’t the seafoam.
It would help to have more context.
You “adjusted the timing til it would run”? And now it’s diesels? But didn’t before ?
“Same with new gas”? Like you drove thru a whole tank and filled up again, or ?
This is tough one. Not much info to go off of.
Could be no fuel for a few diffenrt reasons
Or could be idk. So many parts replaced and not even timed yet.

Good luck.

 

[REBEL RAIDERS]

And all $800 worth of parts after a can of season in the gas….
It ain’t the seafoam.
It would help to have more context.
You “adjusted the timing til it would run”? And now it’s diesels? But didn’t before ?
“Same with new gas”? Like you drove thru a whole tank and filled up again, or ?
This is tough one. Not much info to go off of.
Could be no fuel for a few diffenrt reasons
Or could be idk. So many parts replaced and not even timed yet.

Good luck.

The timing was not off by much to cause what was going on because it was running perfectly fine till I got gas and added the seafood

 

[JamesSam]

The timing was not off by much to cause what was going on because it was running perfectly fine till I got gas and added the seafood

You mean Seafoam!
Have you run through the refilled tank yet? Maybe you got bad gas with water in it? It happens sometimes.

 

[REBEL RAIDERS]

You mean Seafoam!
Have you run through the refilled tank yet? Maybe you got bad gas with water in it? It happens sometimes.

Damn auto correct lol and yea I'm on my second tank I also but a dryer throught the gas to try to help with water if there was any