94 Chevy 1500 4.3 V6

[mred39086]

what cause a 94 chevy 1500 4,3V6 not accelerate when going up hill and when trying to pass it bog downs?

I have a 94 chevy 1500 with the 4.3L V6 Auto transmission. The truck will not accelerate like something is holding it back when going up hill and when trying to pass. The engine will either mis, or bog down, or not change RPM's at all. It runs find when i first start it up and when i'm holding the brake and gas it smothers out like its not breathing and trying to cut off.

[Z45]

Dirty fuel filter?

[mred39086]

i changed the fuel filter and fuel pump

[HawkScot]

When you say you changed the fuel pump and filter, I expect you mean the ones in the tank? Did you change the fuel filter along the left side frame rail also?

[mred39086]

When you say you changed the fuel pump and filter, I expect you mean the ones in the tank? Did you change the fuel filter along the left side frame rail also?

 

 

yes i changed both

[digitalembrace]

Are you getting any codes or flashing service engine light when this happens. I had plugged cats on mine, seems somewhat similar, pull out your front oxygen sensors and go for a drive and see if it still bogs down or misfires. Worth a try.