fast_five_oh

i have a 91 lx 5.0 vert got it with a carb on it an now im going back to fuel injection.

the engine wiring and non mass air computer is from an 88 gt...also the fuel pump relay has been cut out, but i have hooked it back up.

i can touch the green and pink wire togeather under my seat an the pump does come on.

any ideas? ive tried 2 relays also.

Hung Like a Stang

okay man, can you elaborate on the fuel pump relay being "Cut out"?

I just had a fuel pump problem.
Have you made sure your relay activates when the keys turned? That wire comes from the ecm, the pink/blk wire is hot at all times on the secondary side of the relay, and has a fusible link in-line with it as well, but if you can hook up that wire underneath your seat, you know thats all good, as well as inertia switch (green wire) to ground. So that leaves, ecm, ignition switch, or wiring...I'm thinking you have a bad wire from the pcm to the fuel pump relay.

fast_five_oh

the wires were cut on the relay and i got a new pigtail from an 88 gt.

also the ignition switch is fairly new..replaced it after me car died a few times out of no wehre going down the road.

ill go out later an try hat you say an see what voltage i have at each wire.

FORD TOUGH

There is something probably wired up wrong, and you better use that pump relay, its there for a reason. Check this site it has a lot of schematics.http://www.veryuseful.com/mustang/te...#95-95Diagrams

fast_five_oh

yup i used that plac to wire it back up..it just wont turn on right..

also the 88 gt wire color is diffent then my 91's is there anyone who knows what wire on my 91 goes to what number? like red goes to 2 an so on...maybe i have it hooked up wrong..i attached some pics.

my colors are :

blue with brown stripe
green with orange stripe
Pink with black stripe
Red

Hung Like a Stang

that is the older style relay, I'm betting the wires aren't right from the 91 wiring to the old *** relay connector. The new ones are like this

http://www.2carpros.com/forum/automo..._Relaysb_1.jpg

fast_five_oh

ok im gettin my 91s orgianl mass air engine wiring..so i guess this topic is closed for now till i get my wiring