Flutter in idle; serious hesitation

[Ryan from Ohio]

I gotta ask since I didnt see it...

Fuel pressure @ the rail. Hit the valve and let the gas fly. Maybe you got air in there???

What about the temperature sensor? The one before the TB people "chip" with a resistor... Also TPS.

[comanche]

TPS replaced w/used.

No idea on fuel pressure - probably should check that, not sure exactly how...

Temperature sensor believed good... no idea.

[Ryan from Ohio]

Put it in run dont start.

Remove plastic cap on the fuel rail use small screwdriver to derpress valve. It should shoot right out of there.

Im not sure if there is a bleeder of any sorts. I git mine up every time the fuels been disconnected just in case.

[comanche]

For those who had input, the problem seems to be fixed. The GM dealer did a MAF relearn and that did the trick.