My z cranks but doesnt start

[j1rm]

i have a 1991 300zx twin turbo 2 seater: i removed a stereo then i started the Z and it started, but after about 3 seconds it shut off and then it wouldnt turn back on, i switched the fuel filter. A couple days later i recharged the battery after it died. towed it to the mechanic and he couldt find the problem either after running the diagnostic test. took it back battery was dead again, charged it and tryed cranking it, same thing. i removed the ignition relay under the hood and tryed starting it, and it did the exact same thing.

any clue?

thank you

[MaximA32]

I would check all the grounds and make sure you're getting proper fuel flow. I do know that some z32 TT's have issues with the fuel control module. I would check that out.

[j1rm]

Well my z is fixed now, turns out some after market kut off switch was attached to the fuel pump and the cables ended up loose and the dealer fixed it, thanks for ur time