2002 3.1 grrand prix hesitatation

[BIGPETEG24]

my pontiac has 105,000 miles recently started bogging down upon acceleration rpms go up to 5 grand then it shifts.on highway its not as bad but still get theat little hesitation.any suggestions would be appreciated.

[BIGPETEG24]

my vehicle has 105,000 miles recntly started to bog down during acceleration especially going up hills .when the pedal is pushed to accelerate the rpms go up to almost 5grand and then shifts .on highway its not as severe but you can feel it .any help would be appreciated

[tblake]

Merge the two threads possibly? As I think both issues are related if not one in the same.

When was the last full tune up done on your car?

I know 2002 GP's have known issues with cat converters clogging up, GM is aware of the issue and extended the warrenty to 120,000 miles. However I think that the extended warrenty only applies to the 3800 2001 and 2002 GP's.

You could to a vacuum test on your motor to confirm/rule out the cat converter as your issue.

[tblake]

Is your SES light on?

[BIGPETEG24]

those are the same threads, i;m sure the car could use some new plugs and wires not to fond about working on these cars any tips would be appreciated and as far as checking the vacuum how do i go about doing that thanks

[tblake]

Yeah, I'd check vacuum as the first step to verify the converter isnt plugged.

you can rent a vacuum guage from advance or oreilley's.

Hook it to an unported vacuum line. I know the late 3100's if they dont have an air pump, have a vacuum cap on the drives side towards the radiator of the intake plenum. You can hook in there.

your car should show about 16 inches of vacuum at idle, then increase the rpms to 2000. As you increase, the vacuum will drop, and then jump back up and should remain steady as you hold it at 2000. If vacuum dropps, chances are the cat converter is plugged.

[richtazz]

threads merged

[BIGPETEG24]

thanks for the help will give it a shot this weekend will keep you informed on what i find.

[BIGPETEG24]

thanks to tblake put new plugs,wires and also the catalytic converter car runs like a champ now thanks again for your help