Pontiac Repair: 2004 Pontiac Sunfire...hesitation, chevron techron fuel system, fuel system treatment

Question
I have a 2004 Pontiac Sunfire.  When I brake, there is a drumming sound.  Also when I am driving along, there is some hesitation.  What is going on?

Answer
Hi Dorothy:

the noise you hear is more then likley an out of round rear brake drum thumping or a rust build up on the rotors causing the noise. As for the hesitation and kind of warning lamps on on the dash like service engine soon? If so stop by one of the big box auto parts stores and have the car scanned for codes to see what is stored. if not it could be a lot of different things from poor fuel quality water in the fuel to a bad spark plug. with out seeing it ti's hard to say what the issue is. You may want to try some dry gas or a product called Chevron Techron fuel system treatment and see if that helps just follow the directions on the bottle. I'm sure they sell it up ther in Canada. Good luck :-}