Why does my car not start when I press the gas pedal?
If the engine starts (gas pedal depressed slightly) it tells you the problem is fuel related. If the engine runs on starter fluid there is a fuel delivery issue. The car’s fuel pump resides at the top of the list for this system failure.
Why does my GM 4.3L engine not start?
No Start Condition Basics There are three very basic components that the engine, in your GM vehicle, needs to start and they are: Air, Fuel and Spark. When your 4.3L, 5.0L or 5.7L GM vehicle cranks but does not start, it’s because one of these components is missing from the mix.
What causes a car to have a no start condition?
The engine pistons and valves (and all the other related components like: timing chains, etc.) are the ones responsible for the induction of the fresh air the engine needs for the combustion process. Although rare, internal engine mechanical problems can and do cause no-start conditions. Blown head gasket. Blown engine. 4.)
What causes an engine to not start at RPM?
A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil (s) on and off. If you have an RPM signal, a bad ignition module or PCM may not be switching the coil (s) on and off.
How to troubleshoot a GM 3.1L no start?
Important Tips And Suggestions. No Start Condition Basics. No Start 1: Checking For Spark. No Start 2: Checking For Fuel. No Start 3: Anti-Theft System Checks. No Start 4: Checking Engine Mechanical Condition. No Start Summary. Related Test Articles.
What happens when you lift off the gas pedal?
The APP sensor essentially tells your engine how fast or slow to drive when you press the gas pedal. When you press down or lift off the throttle, it sends an electrical signal to the vehicle’s engine control unit (ECU), and then transmits that signal to the fuel system.
Why does my car hesitate when I press the gas?
So when the stoplight turns from red to green, you punch the gas pedal, hoping to sail through the intersection a little, um, faster than usual. But instead of moving when you hit the gas pedal, your car hesitates. Juuust long enough for every car behind you to honk, flip you the bird, or angrily swerve around you.