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It would depend on the vehicle. If the vehicle has a carburetor, the pumping action primes the engine with fuel to help start the engine. If the vehicle has fuel injection, pumping is not required.

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Q: Why do you have to pump the accelerator to start the car?
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Car starts and runs but bogs down when you step on the accelerator?

There are several reasons why a car will start and then bog down when the accelerator is pushed. Some of the reasons could be plugs, fuel pump, or the catalytic converter.


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Carb.? Weak or bad accelerator pump? Fuel Injected? Perhaps bad injectors (leaking)


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It wont allow it to start or sometimes may start but die when you press on the accelerator.


Does a 2004 Cadillac have an accelerator pump?

NO. It is fuel injected and has no carburetor thus no accelerator pump.


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If a car stalls when pushing the accelerator, the car may be in park. The car may also be in neutral if the car stalls and does not move. A very dirty fuel filter or a faulty fuel pump could cause that condition also.


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Just press the accelerator.