s1 RB25det flooding at start up

[twisted99s10]

I am completely lost on this. Car ran perfectly fine when I parked it at the end of the year. I took the engine out and painted the engine bay, and put a fuel cell with an inline walbro 255 instead of the in tank unit I had last year. After reinstalling everything, the engine floods when the fuel pump primes. if i pull the fuel pump fuse it'll start, and as soon as I put the fuse back in it starts running ridiculously rich. I checked the tps voltage, and its fine. Cleaned the maf as it had some dust from sitting on a shelf all winter, fuel pressure is correct while running, but wont fire until there is less than 5psi in the lines. The fuel lines are run correctly. I have found a few threads with the same problem but no actual explanation of what fixed it, the threads just ended. Any help would be appreciated.

Rb25det s1
walbro255 fuel pump
nismo fpr
holset hx35 turbo
fmic
3" exhaust
freddy intake manifold
q45tb
q45 maf

[Carl H]

you remove the fuel injectors at any point?

[twisted99s10]

No, I didn't. I found the problem though. There was a break in one of the ecu coolant temp sensor wires. Once it was repaired it fired right up with no problems. I would have never thought a non working coolant temp sensor would have caused such an issue.

[Carl H]

if the ecu doesnt see the ECT it locks coolant temp to about 10*c.