* Lack of air: This can be caused by a clogged air filter, a blocked air intake, or a problem with the throttle body.
* Weak spark: This can be caused by worn spark plugs, bad ignition wires, or a faulty distributor cap or rotor.
* Low compression: This can be caused by worn piston rings, a damaged head gasket, or a problem with the valves.
* Overheating: This can cause the engine to lose power and bog out.