[RedVooDoo]

Hello All,
I have a 1991 GrandPrix GT 3.4l Dual Twin Cam, it runs okay when
its cold, as I drive more it starts to idle very poorly, rpms up and down,
and when I am shifting down its like its going to stall and sometimes does just die.
If/when it does stall it starts right up again but will pick its spots
to stall and run poorly.
I have replace an IMAP sensor and the Air INtake Controller, and fuel pump, these are items my mechanic felt could be the problem.
If anyone has a suggestion it would be appreciated.

Thanks, John