Car won't start 1995 5.0 turns over

[larrypreston]

I replaced the ecu like 3 times and now I don't think I'm just going to waste money until I find out why the ECU keeps going out I no nothing about electronics in a car is there any way to by pass the ECU or parts of it this is my first Ford I have always had Chevy but have all ways loved mustang got a good deal and really like this car but now the wiring is giving me some problems I need help please

 

[larrypreston]

1995 5.0

 

[89ripper]

Hello Larry. This is the welcome forum so not sure how much help you would find here. So let me ask, why did you figure it was the ecu giving you problems to begin with?

 

[AeroCoupe]

Welcome to the forum and here is the first place most go when you get the cranks but doesn't start problem:

Cranks OK, but No Start Checklist for Fuel Injected Mustangs

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995 A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work...

stangnet.com

I am with 89ripper on how you determined the ECU's are going out. Really need to know what is going on with the ECU as that can allow working backwards to find the issue.

 

[larrypreston]

Hello Larry. This is the welcome forum so not sure how much help you would find here. So let me ask, why did you figure it was the ecu giving you problems to begin with?

I just threw out everything else because I. Use a test light and from what I could tell I was getting power in and out of everything I checked I was getting spark I was getting fuel and all the fuses was good checked the button in the trunk and it was good so I replaced the ECU and bam it fired right up drove it about 5 miles on the freeway and it just died going down the freeway at about 70 it just died tried turning it over it did but wouldn't start..I have a tow truck got it to my house tried to find a short anything got a another ECU it. Started up drove it a couple miles same thing I messed with the tail light because I found some bad wires so I thought I found the problem but nope so now back to were I was

 

[larrypreston]

I just checked the fuses and found the 50 amp is blown I think it's the 3rd one down from the driver fender if that helps I'm going to see what that controls and go from there I need help bad thanks

 

[AeroCoupe]

You need an EVTM for your car.

Electrical / Troubleshooting Service Manual, Reprint Of Original, 1995 Mustang, Also Known As The Evtm Supplement, Note May Incl Other Ford, Lincoln And Mercury Models - #M-LSM-95AE - National Parts Depot

Buy part #M-LSM-95AE Electrical / Troubleshooting Service Manual, Reprint Of Original, 1995 Mustang, Also Known As The Evtm Supplement, Note May Incl Other Ford, Lincoln And Mercury Models for your classic 1995 Mustang from National Parts Depot. Free shipping on orders over $300, fast delivery...

www.npdlink.com

 

[89ripper]

I just threw out everything else because I. Use a test light and from what I could tell I was getting power in and out of everything I checked I was getting spark I was getting fuel and all the fuses was good checked the button in the trunk and it was good so I replaced the ECU and bam it fired right up drove it about 5 miles on the freeway and it just died going down the freeway at about 70 it just died tried turning it over it did but wouldn't start..I have a tow truck got it to my house tried to find a short anything got a another ECU it. Started up drove it a couple miles same thing I messed with the tail light because I found some bad wires so I thought I found the problem but nope so now back to were I was

Sounds like you have some electrical gremlins, do what Aero suggested and get a tech manual