Does anybody have suggestions on what would make a my 4.3 tbi flood until the engine warms up? The only way this thing will start is if I unplug both injectors, let it almost die, plug one in, open throttle, plug in the other one, then hold throttle open for about 3 minutes. After all that and the engine warms up it runs ok. any help?

water temp sensor

Is the check engine light on??? If so take it and have it scanned.Could be any of a # of things.

Just to name a few.
bad O2 sensor
bad TP sensor(throttle position sensor)
bad Map sensor

I doubt that both injectors are bad,but stranger things have happened.

The check engine light is always on. Can checker auto read the signals?

I dont know we dont have them around here.A good service manual will tell ya how to check the codes.

water temp sensor

X2, it only cost around $8 and only takes about 5 minutes to replace. It should be by you gooseneck.

The check engine light is always on. Can checker auto read the signals?

Goddamn, you can read the codes with a freakin' paper clip.:shaking: