need a tbi guru.

[Toolegit86]

so working on my buddys 95 burb and man what a pain..

it seems to load up and just fall on its face under load or if you just dump the pedal idle is awesome and start is good. just mid and upper range it loads up.. sometimes back firing under load. almost like to much fuel or timing issue so what ive done;
changed all sensors on thottle body, including injectors and regulator twice.
the intake temp sensor.
new plugs cleaned the cap and rotor.
tomorrow we are going to try a o2 but i am open to any other ideas need to get him going so he can go to spokane friday.

[Lurch]

How's back pressure? Is the cat plugged? Fuel pressure?

[Toolegit86]

I have not checked out fuel psi but it seems to be over fueling.. and the cat is empty

[79chevy39.5's]

Codes? Also check the basics plugs wires. Valve adjustment

[Toolegit86]

No codes. But I did advance the timing and it runs good now..