Smoke from the exhaust of a 2007 VW Beetle after deceleration and then accelerating again can be caused by several factors. Common reasons include oil leaking into the combustion chamber due to worn valve seals or piston rings, which can lead to increased oil consumption and smoke on acceleration. Additionally, a failing turbocharger (if equipped) or issues with the fuel system, such as a rich fuel mixture, can also contribute to smoke. It's advisable to have the vehicle inspected by a mechanic to diagnose the specific cause.
It may be the heat shields on the exhaust system vibrating.
sounds like a stuck fuel injector
A popping sound when accelerating hard could be caused by backfiring in the exhaust system due to unburned fuel igniting in the exhaust system. This can occur if the air-fuel mixture is not properly balanced or if there is an issue with the ignition timing. It is recommended to have the vehicle inspected by a mechanic to diagnose and address the specific cause.
Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.
AnswerIf you are having problems with power while shifting and accelerating have your fuel censor looked at. You may need egr valve checked .You may need intake decarbonized .You may need mass air flow sensor .
A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Also check your ignition timing, if it is late and you have a rich mixture you can get a backfire. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound.
It is the alternator....
Lack of propulsion.
Acceleration or deceleration is caused by a net force acting on an object. When the net force is in the same direction as the object's motion, it causes acceleration. When the net force is in the opposite direction, it causes deceleration.
Dirty fuel filter
dirty fuel filter
start with the spark plugs