no power trail blazer

2001 trail blazer , with 48.500 miles on it , no power ; check fuel presure 54 psi, check fuel filter new fuel filter, , new air filter , no codes presents , pressing the pedal to the floor give 4000 rpm but no enought power , and some times shut this off, any ideas? will be helpful thanks ,

Do you mean 4k in neutral or driving?

is it the 4.3 V6 motor?

This truck has 4.3 liter , v6 yes it is ,is driving me crazy, runs good in idle , no misfire , when is hot is ok , but when I start in the morning or when I left cool down there is no power and shut off some times , no codes present do you think can be the transmission , ECM , how about the catalytic converter? please help me boss is going to fire me if I don't fix this sucker. thanks dornier34.

This is the wrong forum this is for the 2002 up TB's I am going to move you to the Blazer forum. Ok, I believe 54 psi may be low fuel pressure, check the specs, could be a bad fuel pump.