Car wont accelerate when gas pedal is fully pressed

JEORGEANN

MEMBER
2001 PONTIAC MONTANA

Car wont accelerate when gas pedal is fully pressed, shows on rmps it is accelerating, Stalls when hot but if I pour water on the motor is runs?

My husband and I bought a 2001 Montana, the car has had problems ever since. At first when the van gets hot it wouldn't crank unless it set for at least 30 mins or you poured water over the motor (which is Bad to DO)

Now it Hesitates when gas pedal is fully pressed, backfires, and shutters it accelerates when you let off the pedal slowly and gently press it again, but once it gets 50 miles and hr it runs fine. We have replaced the Camshaft sensor, already any clue where to go from Here?

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Scan for codes and check fuel pressure first. Most auto parts stores will scan for free. It cold be something else but start there.

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Wednesday, September 5th, 2012 AT 1:49 PM

JEORGEANN

MEMBER
2 POSTS

Did all that. We replaced camshaft sensor, still has same problem. Its even worse actually, but it was worse before replaced the camshaft sensor. If you want to crank it you have to pump the gas alot. When it cranks its slow to take off and it backfires alot, but once you get it going you have to barely press the gas or it bogs back down and you have to press the gas and release it slowly til its barely pressed again and it will get to about 60. We checked the codes it says fuel system lean we replaced all the filters and even had the fuel pump tested. Ever here of this?