boggs down on acceleration on 1995 Pontiac Grand Am

The water pump went out on the car and it had to sit for 3 months, it ran ok except overheating. Nw that that is fixed, it will not accelerate. I have to pump the gas pedal to get it to go, once over 50 mph it runs ok. It also stalls at lights. We have put 1/2 tank of 93 octane, Heet, Octane Booster and Injector Cleaner in the tank but no help. Replaced the fuel filter and checked vacuum hoses.... NOTHING HELPS.

by in Longwood, FL on July 14, 2009
1 answer
ANSWER by on July 17, 2009
I have seen guys bump off a vacuum line while doing this job on the 2.3 liter. Check all of your vacuum lines and connections. Is there a Service Engine Soon Light on?