Accel/Brake catching I have a 2002 Pontiac Sunfire When I come to a complete stop or rolling stop then accelerate, something is happening in the rear of my car. It feels as if someone is running into the back of my car. It does not stop my car, but it scares my passengers to death. It does have a feeling that something is releasing but I do not feel as if my acceleration is hindered. I went to 2 shops, got an answer of some form at the first, the 2nd one hooked it up to the computer and said that there have been no codes showing to register that problem...

need to remove rear brakes and check brakes and or e-brake may be hanging up or sticking also check for broken or stuck part

it is hard to figure out what roll pin you say but there is no secret if the roll pin is inside the bell housing you need to remove the transmission
hope it helps

When the car is cooled off bang on the exhaust. It's possible you have a heat shield that is loose. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Well, it could mean that the emergency brake has not been fully released.The ABS system light is on if something has occurred within the ABS system. Something faulty may have happened there, get it checked out!

right rear,left rear,right front,left front wheels.

The brakes themselves would not likely be the cause of a popping sound, but the problem may only show up during braking. The shake could be from loose steering parts or from distorted rotors. Rotors get quite hot during braking, and the faster you drive and the harder you stop the more heat they have to take. Have the brakes inspected by a qualified brake technician. (A lot of shops offer free brake inspections.) A tech will also note problems with the steering parts connected. Give the tech as much info as possible - does it happen during turns, only when braking, when accelerating, etc. The more information you supply the better the chance of catching the problem.

Well If you did happen to get Brake fluid in your Engine some how. The gaskets you would need would be the valve cover gasket, head gasket,Header gasket, Waterpump gasked, Front and rear main seals,and Thermostat gasket.

Parking brake linkage improperly adjusted.

Get your caliber replaced and if it still has the factory rotor also get that replaced. Recommended to get both replaced at the same time.

The E-brake just needs adjusted up on the pads or rear shoes. If shoes on the rear instead of pads, it will hold from rolling back but not forward if not getting full pressure from the brake shoes needing adjusted up closer to the drum. It will hold from back roll because of shoe design. More shoe surface on the rear shoe than on the front shoe. That's the way they're built.