Saturn sc2 power loss above 50% throttle

SOURCE: misfiring passat 1.9 tdi when

Spark plugs in a TDI?

SOURCE: Stumbles on acceleration

Well, I would replace the air filter, make sure the air hose from the air filter to the intake is not kinked or blocked and check for vacuum leaks. If these are all fine, I would check the fuel pressure as it is possible the pump is weak and not supplying enough fuel.

SOURCE: 95 saturn sc2 and the a/c compressor does not engage when I turn on the switch

either it's undercharged or there is something unhooked/ faulty in the electrical system. more than likely undercharged.

SOURCE: 1994 Silverado stumbles on acceleration when cold

Is the check engine light on? If it is, take the truck to an autoparts store and have them use a scan tool to retrieve the fault code(s) stored in the computer. I would suspect a faulty throttle position sensor or bad EGR valve, but the code(s) should narrow the problem down. Sure hope this helped.

SOURCE: Car "chugs" when accelerating

If you don't have any service engine lights on, it probably is fuel related. You can do a fuel presure test to see what shape your pump is in, should be around 46-96 psi. Change filter...check injectors by unsnapping the connectors and taking an ohms meter and looking for .12 ohms at each injecter. You also, can test the injector to see if it is working by using a stethescope and listen to each injector for a clicking noise if ones sounds different...that would be a good place to do the ohms check...if either test fails, that could be where your problem lies.