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It's usually the Coolant Temperature Sensor.

You know you gotta give the engine some more gas when it's cold if you want it to start. The mechanism to do this on a carbureted engine ranges from the bulb on the side of a lawnmower carb (push five times to start) to a nifty little pump that's controlled by a thermostat-style bimetal strip.

On a fuel-injected engine, the computer just squirts some more gas in there when it thinks it needs to--it looks at the coolant temp, decides whether the engine is warm and goes from there. If the CTS goes bad, the FI control box thinks the engine's cold all the time...and your engine floods.

I made a little workaround in my car by wiring a switch into the fuel pump circuit. I turn the fuel pump off and start the engine. Once it catches, I've got about two seconds to turn the fuel pump back on. Once the fuel pump is back on, the car is in "running" mode, and it stays running. A $3 switch is cheaper than a $40 special-order CTS and works as well.

AnswerThe fuel pressure regulator is bad and will no longer hold the pressure in the line. Or the fuel injectors are bad and are draining into the combustion chamber.

If you let go of the key too fast while starting, it can flood out. I seen it happen many times when I'm not driving it. Just a fraction of a second can mess it up. Car is a 2002 Bonneville V-6 SE If some one starts there car like this a lot, it will mees up the sensors sooner or later. Been there....Done that!

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โˆ™ 2011-11-24 01:54:59
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Q: Why does your fuel injection act like it is flooded when you start the car after it has been setting for an half hour or longer?
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