On the freeway the car will not accelerate over 50 mph

TRACEYANN2

MEMBER
2005 PONTIAC AZTEK
4WD
AUTOMATIC
220,000 MILES

When I attempt it it jumps and lurches.I can floor the gas pedal and wont get over 50. Also the ABS awd deactivated and brake lights are on. There is a grinding noise in the front end of the car.I know it needs brake pads and am replacing those today hoping to eliminate the grinding. Also the gas gauge seems to fluctuate a lot while I am driving.

6 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Just curious. Quick question first. Is the check engine light on? Thanks for using 2CarPros.
Danny-

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Friday, May 10th, 2019 AT 5:51 PM

TRACEYANN2

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4 POSTS

No

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Friday, May 10th, 2019 AT 7:39 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Not having any codes makes it a little more difficult to diagnose. Has routine maintenance been performed? It could be a spark plugs, plugged fuel filter, plugged catalytic converter(s), fuel injectors/throttle body problems. Many different things. Best thing to do is find someone or take somewhere that has access to a scanner and can use the live data/freeze frame information to figure out your cars fault(s). Hope this helps and thanks for using 2CarPros.
Danny-

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Saturday, May 11th, 2019 AT 8:39 PM

TRACEYANN2

MEMBER
4 POSTS

Okay, so I had the front end fixed needed brake pads new hub assembly and bushings the grinding is gone. Still have the ABS light on and the awd disabled light on. Still having the same acceleration problem. Its not giving off any codes.

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Tuesday, May 14th, 2019 AT 12:03 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again,

Like I stated earlier best thing to do is find someone or take somewhere that has access to a scanner and can use the live data/freeze frame information to figure out your cars fault(s). It could be a spark plugs, plugged fuel filter, plugged catalytic converter(s), fuel injectors/throttle body problems. Hope this helps and thanks again for using 2CarPros.
Danny-