97-gst
10+ Year Contributor
- 1,234
- 1
- May 16, 2010
-
Radford,
Virginia
does anyone know why i have to pump my gas while starting my car?
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Because your carb is gunked up...
Its got a new 1000 dominator carb on there, it cant be that.Because your carb is gunked up...
It could be possible that your stock FPR is going bad which is causing your fuel system to no hold sufficient pressure in the fuel rail.
Wowwww....I am shocked at the answers everyone is giving.
You pumping the pedal is an illusion...it is the excessive cranking that you are doing that is allowing the car to start.
Pumping the pedal will do nothing on an EFI motor. Pumping the pedal on a carbuerted vehicle works because it will allow gas to be injected directly into the carburetor where the magic happens.
All you are doing is opening and closing the butterfly on the throttle body allowing more/less air to enter the engine while cranking.
Your problem may lie in the fuel system...check the check valve by the fuel pump cover. Check the O-ring on the fuel pump output shaft inside the tank.
Can't believe anyone hasnt said this....CHECK YOUR CTS. That may be the only cause. Bad CTS's are notorious on DSMs and they make your car very very hard to start.
Wowwww....I am shocked at the answers everyone is giving.
You pumping the pedal is an illusion...it is the excessive cranking that you are doing that is allowing the car to start.
Pumping the pedal will do nothing on an EFI motor. Pumping the pedal on a carbuerted vehicle works because it will allow gas to be injected directly into the carburetor where the magic happens.
All you are doing is opening and closing the butterfly on the throttle body allowing more/less air to enter the engine while cranking.
Your problem may lie in the fuel system...check the check valve by the fuel pump cover. Check the O-ring on the fuel pump output shaft inside the tank.
Can't believe anyone hasnt said this....CHECK YOUR CTS. That may be the only cause. Bad CTS's are notorious on DSMs and they make your car very very hard to start.
The CTS is the Coolant Temp Sensor. It sends the temp of the motor to the ECU so that the ECU knows how much gas to pass through the injectors to start the motor for the given temperature.
When these fail (which happened on my other DSM), they will read open continuity and will be hard to start. These have a certain resistance, something like 2000ohms at 70* or something like that. If the resistance isn't right, the ECU will allow for less than sufficient fuel injection at startup.
I would check the resistance between the two prongs on the CTS (located on the thermostat housing) to see what it reads. Keep checking it as it warms up....as it warms up, the reading should get lower. If nothing changes then it's shot.
Oh ok. I've been thinking that its electrical since it first started after I arced the alternator. Is there a relay or fuse for the CTS that might have blown?
Wowwww....I am shocked at the answers everyone is giving.
You pumping the pedal is an illusion...it is the excessive cranking that you are doing that is allowing the car to start.
Pumping the pedal will do nothing on an EFI motor. Pumping the pedal on a carbuerted vehicle works because it will allow gas to be injected directly into the carburetor where the magic happens.
All you are doing is opening and closing the butterfly on the throttle body allowing more/less air to enter the engine while cranking.
Your problem may lie in the fuel system...check the check valve by the fuel pump cover. Check the O-ring on the fuel pump output shaft inside the tank.
Can't believe anyone hasnt said this....CHECK YOUR CTS. That may be the only cause. Bad CTS's are notorious on DSMs and they make your car very very hard to start