2003 Pontiac Grand Am Hesitation upon acceleration

SIRSEAN52

MEMBER
2003 PONTIAC GRAND AM
6 CYL
2WD
AUTOMATIC
92,300 MILES

Hi,

When I press on the gas, there is a great amount of hesitation. On the freeway, to go past 60mph, I have to press the gas all o te way down in order for the car to go faster. It also seems to studder lightly while on the freeway. No matter the speed, it seems to hesitate. I recently changed the fuel filter with hopes that this would solve the problem.

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Has the check engine light come on? Also, have you checked the catylatic converter to see if it is plugging? Have you checked fuel pump pressure?

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Monday, September 28th, 2009 AT 8:25 PM

SIRSEAN52

MEMBER
3 POSTS

I'm not quite sure how to check either of those. How do I go about doing that?

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Tuesday, September 29th, 2009 AT 10:12 AM

SIRSEAN52

MEMBER
3 POSTS

Also, the check engine light is on

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Tuesday, September 29th, 2009 AT 10:14 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

If the light is on, take the car to a nationally recognized parts store and have them scan the engine for codes. Most will do it for free and it should identify where the problem is coming from. Also, here is how to check fuel pressure:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

As far as the converter, after running the car at night, check it to see if it gets red hot. Also, make sure there is pressure coming from the exhaust. There is another way to check back pressure, but it is difficult to explain.

let me know what you find.

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Tuesday, September 29th, 2009 AT 10:30 AM