1997 Buick Regal no clue

NEWYORKMAN10

MEMBER
1997 BUICK REGAL
6 CYL
FWD
AUTOMATIC
197,000 MILES

When the car is cold it runs perfect all kinds of power but as soon as it heats up it looses power and starts to buck or hold back has a bad smell at certain times no power on hills I have changed plugs and wires fuel filter im really not sure some people said it could be cattilatic converter but I dont know any ideas thank you

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

IT could be the converter. Have you checked back pressure? You could disconnect the converter to see if that makes a change, but it will be loud.

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Saturday, June 27th, 2009 AT 7:35 PM

NEWYORKMAN10

MEMBER
3 POSTS

I have replaced the converter the tps and it still does it I am running out of ideas

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Saturday, June 27th, 2009 AT 9:48 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Have you checked the EGR to see if it is working properly?

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Saturday, June 27th, 2009 AT 11:10 PM

NEWYORKMAN10

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3 POSTS

No I just replaced the mass air sensor and it is still doing it

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Sunday, June 28th, 2009 AT 6:51 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

I would check it. It could be carboned up and not allowing the valve to open or shut. Also, clean any carbon in the intake that is present. Make sure the valve moves and seals.