I can smell the fuel when i try and crank it, but it will not start unless i pull the fuel pump relay.
What could cause this. Bad injectors? Regulator? It has also now started to run bad.( this problem just started so may not be related, acts like I got some bad gas).
I have a 350 with a miniram and 24 lb injectors. It has a custom chip. This is a recent problem. The car has run fine previously.

 

Found out why it was running bad, burnt plugwire. It still has a low rpm stumble though. Does anyone know how I should go about trying to solve my flooding problem. This is pissing me off. This is one of the reasons I didnt go carb.

 

Stock,

There are a few possibilities:

Leaking injector(s);

Leaking diaphragm in the FPR (pumping fuel back through the vacuum hose to the plenum);

Grounded injector wiring harness (causing all injectors in one bank to open).

It is fairly easy to check the FPR. Simply remove the vacuum hose at the plenum and turn on the fuel pump. If you get fuel from the regulator, it's leaking.

Testing the injectors for leakage will require a pressure gauge. Pressurize the fuel rails, then turn off the pump. Monitor the fuel pressure for ten minutes. If the pressure hasn't dropped significantly, the injectors are probably not leaking. If the pressure falls quickly, either the pump, regulator, of injector(s) are leaking through. You can perform the test again while pinching the fuel return line shut to eliminate the regulator, and with the supply line pinched shut to eliminate the pump check valves. If the pressure still falls after the lines are shut, at least one injector is leaking.

You can meter the injector wiring harness for grounding. You can also pressurize the system, then wait for the pump to shut off. If the fuel pressure drops immediately, the injectors are open.

Let us know...

 

In addition to what Vader said, you may also want to check your coolant temp reading if you've got a scan tool. A FUBAR coolant temp sensor will cause the car to flood when you try to start it because it sends a -20 or -40* signal to the computer, which responds by riching the **** out of the startup mixture.