Q: I have an 08 PT cruiser, when I hit the gas the RPMS move but the car does not accelerate. There is also this loud thumping noise

asked by on July 10, 2017

When I hit the gas my car does not accelerate, the rpms go up but I don't move. The cars check engine light is on and is now constantly beeping and flashing. When the car finally decides to move there is a very loud clunking kind of noise from under the hood, and I mean it's loud! We also have issues starting the car. Also if I sit at a light I have to put the car in neutral or park and rev the engine so it doesn't die.

My car has 90400 miles.
My car has an automatic transmission.

Hi There, Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter, bad spark plugs or spark plug wires and many other reasons. Due to the wide range of possibilities for the check engine light to come on, the best and most efficient way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. This will allow a mechanic to determine more specifically what to look for in diagnosing your vehicle. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

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