I have had a couple of vehicles that would not always run smoothly at startup. It helped when I would turn the key to on for a few seconds before starting. This lets the fuel pump pressurize the injector system. I think the fuel system leaks back when the vehicle sits for a day or two especially true on older vehicles. If you go to start immediately some cylinders don't get the correct amount of fuel because the system is not operating at full pressure. This did help my vehicles, may not do the same for yours but doesn't cost anything to try.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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