Losing power..

[Al-Haqq]

Jus bought a 83 4wd. Decent truck, need a lil work but I knew that when I got it. One problem is that it loses power under consistent load. I can be driving with my foot on the gas and about after a couple of minutes it loses power. Doesn't die but it kinna falls flat. Let my foot of the gas, coast for a second or two, and it good. Was told that the carb filter was clogged, but when I checked it looked good. Does this mean that I need a new carburator or rebuild this on??

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[roundhouse]

Could be lots of things
Check all the rubber fuel lines and if they are old , I'd replace them
When they get old they can collapse from the vacuum from the fuel pump trying to pull fuel through them

Does your truck have the mechanical fuel pump on the engine ?

Try driving it with the gas cap removed and see if it cures it
If so it means the vent system that lets air in the tank to replace the fuel as its consumed is clogged



You might want to install a clear aftermarket fuel filter right before the carb so you can see what kind of gunk is in the tank


There is also usually  a filter inside the gas tank
Which hopefully is not the issue since you have to drop the tank to change it

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[Al-Haqq]

Could be lots of things
Check all the rubber fuel lines and if they are old , I'd replace them
When they get old they can collapse from the vacuum from the fuel pump trying to pull fuel through them

Does glue truck have the mechanical fuel pump on the engine ?

Try driving it with the gas cap removed and see if it cures it
If so it means the vent system that lets air in the tank to replace the fuel as its consumed is clogged



You might want to install a clear aftermarket fuel filter right before the carb so you can see what kind of gunk is in the tank


There is also usually  a filter inside the gas tank
Which hopefully is not the issue since you have to drop the tank to change it

Sent from my iPhone using Tapatalk

Thanks I'll start checking these things this weekend...


Sent from my Z956 using Tapatalk

[roundhouse]

Could be lots of things
Check all the rubber fuel lines and if they are old , I'd replace them
When they get old they can collapse from the vacuum from the fuel pump trying to pull fuel through them

Does glue truck have the mechanical fuel pump on the engine ?

Try driving it with the gas cap removed and see if it cures it
If so it means the vent system that lets air in the tank to replace the fuel as its consumed is clogged



You might want to install a clear aftermarket fuel filter right before the carb so you can see what kind of gunk is in the tank


There is also usually  a filter inside the gas tank
Which hopefully is not the issue since you have to drop the tank to change it

Sent from my iPhone using Tapatalk

Thanks I'll start checking these things this weekend...


Sent from my Z956 using Tapatalk

If it's the filter sock inside the tank
Sometimes you can clear it by blowing compressed air backwards thru the fuel lines into the tank

But my 74 Bronco had a lot of sludge and goo in the bottom of the tank and the only cure was a new tank

I've run into that a lot recently
The ethanol crap the fedgov puts in the gasoline now , is like a solvent and breaks loose all the dirt and sludge that's spent 40 years building up in your tank

I've got  a almost new tank you can have if you wanna pay the shipping

We used it for a few weeks and then did a LS  engine transplant and had to get a new tank for a 1987 model with the in tank fuel pump


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