I own a pt cuiser 2.0 ecc 2001, and would appreciate any information you could share with me about my car's failures. After changing the gasket, cylinder head and bent valves, it started presenting many sensors' failures : camshaft, oxygen, acceleration and MAP. The engine apparently starts properly when in dead center, it accelerates properly but, when changing to either D or R, the engine chokes and loses power, and even stalls. I would like to know if the problem is in the sensors, in the electronic control unit or in the gearbox. Thank you!

The engine had a problem so we bought a new 2nd hand one, but now its failing to start, we even changed the the rings , pistons and cylinder head gasket