WhiteWindsor

Since you have already installed a new fuel pump you will just have to trace back everything involved with the fuel delivery and find the problem. I know it's a pain but i dont see any other way of finding the problem. May someone will chime in that has had this problem before and give you an answer. Damn i am glad i went with a carb this time lol.
Good luck man

onetrickpony

Have you checked all of your fuses? Sometime its the dumbest things that you would never think would cause an issue.

2 kwik

I believe it's the #8 slot in the fuse box a 15 amp

comptech35

ive checked all fuses . ive checked every wire i could they all looked to be in good shape. expect a wire on a relay right under the maf sensor the plastic around the wire flake off about 6" i taped it up.anyone know what that relay is for?befor anyone say's 88z dont have maf they do i have 88 1/2 cali car the first mustang's with maf.

Cobra77

On the inside of the fender? Not sure about that year, but it might be the fuel pump relay, or an a/c cutout relay. Did'nt you say you replaced the fuel pump relay? I know they're either under the drivers seat, or on the inside of the fender in the engine bay, not sure about your year, where was yours?

comptech35

i replaced the relay under the driver seat already. that waz the only wire i found to show any kind of wear.

AdderMk2

dude, no offence, but your on a forum full of long time mustang owners.... we know that 88 was the first year for maf cars in cali... we also know that even an 86 can have a maf in it... if converted

generally speaking... this forum knows more then you do... dont fool yourself by thinking otherwise