Why would a 1994 Chevy lumina apv sputter and stalls when you step on the gas?

Answer 1

It could be the gas. If the gas in the tank is the type that is made by corn (Ethanol) it goes bad after awhile. Other possible solutions are; The timing could be out of alignment The PCV system could be clogged. (The PCV system lets the crankcase breathe easier) There is a additive called Sea foam. Seafoam is a "run-through" type carb/fuel system cleaner. It has the added benefits of removing carbon deposits in the head (if used in high concentration) and cleaning out sludge in the crank case if added to the oil. There's instructions on the can for different treatments. It's only available in the USA. With engine warm, slowly pour 1/3 to 1/2 pint through carburetor or throttle body throat. (If vehicle is port injected slowly pour SEA FOAM through direct manifold vacuum line that will feed all cylinders, possible sources are P.C.V. valve or brake booster line.) This will pull SEA FOAM down on top of the pistons and to the back of the intake valves to dissolve carbon. Turn ignition off. Restart engine after 5 minutes. If severe carbon build up is apparent, use more Sea Foam as previously directed. Make sure exhaust is well ventilated when using Sea Foam in these various ways as fumes will be extreme for a short time. Pour 1/3 to 1/2 pint into oil crank case to clean rings, lifters, dirty parts and remove moisture. Pour 1/3 to 1 full pint into fuel tank to clean injectors, carburetor jets, fuel lines and remove moisture. Immediate Results: Smoother idle, increased R.P.M.'s better throttle response and improved performance. See label on can for detailed results for use in each area. Here is there website http://www.seafoamsales.com/motorTuneUpTechGas.htm