Engine Bogs Down

[1997jimmyblaze]

Hey I have replaced many parts on my truck including cat, wires , plugs , fuel filter, dist. , new o2 sensors and i still cant find the problem

 

I get no mil light on so no codes ,the problem is when i stomp the gas the engine bogs down instead of going wide open throttle. If i lightly apply the gas i can drive at normal speeds just fine , but ass soon as i need to punch it like to pass some one it just bogs down no power

 

any help would be awesome thanks

 

1997 gmc jimmy 4.3 l

[Jsdirt]

First thing I would investigate is the air filter & housing for either a nest, or a real dirty filter. Second, check fuel pressure & flow.

[04sierrafl]

AFTER THAT CHECK YOUR CATILITIC CONVERTERS, THEY USUAL GET RED HOT IF THERE IS A PROBLEM. YOU CAN ALSO TAKE THEM OFF A MAKE SURE THEY AREN'T MELTED/CLOGGED.

[jro909]

what about the injectors? my old 4.3 use to have the same problem, i did everything like you did and i never could solve it..then again it had no exaust, just a 3 foot pipe sticking out of the manifolds to keep the fumes away from the cab and fuel tank...