95 tahoe bucking under part throttle and no codes

[95tahoemike]

has a new tank and fuel pump. no vacuum leaks.

 

[SunlitComet]

I agree with Retorq. Even if you have a new pump re-verify the fuel pressure. I know it is a pain but if it turns out to be the cause because of pump or regulator you did not waste money on unnecessary parts.

 

[dsltrc]

Sounds like the same problem I was having... I found that my EGR valve was dumping too much exhaust into the intake, all without a code... I replaced the EGR and that helped for a day or two... finally cut an aluminum plate to sandwich between the EGR and intake.. now I have a code concerning that but it no longer bucks....

 

[crows feet]

check egr valve.pull vac line off and try....worked on mine ruff run at abought 1000 to 2ooo ...runs great till you put vac line back on....

 

[95tahoemike]

fixed it i cut the cat off runs great now