Fuel starvation problems

[too-fast]

I have a 89 chev suburban that I just bought with only 76thousand original miles on it for my wife (Soccer, Baseball, Football Mom). I’ve just experience fuel starvation problems. It runs fine at idle but as you drive it feels like it’s running out of gas. The funny part is if I floor it when it starts cutting out it takes off like a rocket. I have already replace the fuel pump thinking that was the problem from the get go-NOT. Do you have any idea what it could be?

[mdcamaro]

Did you change fuel, air, and trans filters? Also a bad cat converter will cause loss power under load like going up a hill. Not enough miles for it to be broken rings or valves unless you are using a lot of oil.

[too-fast]

It’s not the fuel filter or the fuel. I think it’s the electrical system. The thing will run fine for 3 to 5 miles when you start it then it starts acting like its running out of fuel.
It starts cutting out then goes. It will run fine then starts all over again.
It just feels like then fuel pressure is dropping off then goes back up to normal again.

I’m thinking about running a jumper wire to the fuel pump to see if that solves the problem temporarily if it do’s then I’ll go from there.

What do you think?

I’ve read other things online that it could be the oil pressure switch or the computer varying the voltage to the pump. Chevy’s had a ton of problems with there fuel systems from about 89 to 98 from what I have read from others.