'90 won't staying running...

[StargateBWH]

Hey all, I have a fresh build '90 5.0 all new with a few modifications. It will start and run but after about 5 minutes it will load up and stall. I've replace the injectors and fuel pump, but can't seem to figure it out. Any thoughts?? Any help is appreciated.

 

[General karthief]

More info needed.
what mods
injector size
Original V8 car?

 

[Cheapskate207]

Any codes?

 

[Potomus Pete]

Ignition module or the dreaded pip...........Do the check list

 

[StargateBWH]

More info needed.
what mods
injector size
Original V8 car?

Bored .30
70mm BBK throttle body with egr plate
BBK fresh air intake

No codes

Thanks,

 

[StargateBWH]

Ignition module or the dreaded pip...........Do the check list
[/QUOTE

More info needed.
what mods
injector size
Original V8 car?

And yes original V8 Car
'90 LX 7-up

 

[General karthief]

When you say no codes, this is misleading because there should be an 11 code meaning everything checked out, no codes would be a bad computer or wiring problem.
there is a thread for checking the codes:

Electrical - How To Pull Codes From EEC-IV In 86- 95 5.0 Mustangs

@Noobz347 - The code dump procedure isn't in the sticky - you may want to add it... Dump the codes: Codes may be present even if the Check Engine Light (CEL) isn't on. Dumping the computer diagnostic codes on 86-95 Mustangs Revised 26-July-2011. Added need to make sure the clutch is...

www.stangnet.com

Also a checklist for a cranks/no start that will help.

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...

www.stangnet.com

 

[nepats1973]

I have a 90 GT with a replaced .30 bored out 302. Stock throttle body. New IAC, TPS new and dialed in. I have replaced everything. I have sent my computer off to be rebuilt twice. New distributor, 24lb injectors with matching MAF, 39lbs of fuel pressure. New fuel pump & filter. Replaced all fuseable links. I ran the "no start checklist" multiple times. The engine starts every time and immediately stalls. I monitored fuel pressure and it is within specs. I spray starting fluid in intake and engine stays running. New fuel injector harness. Removed and soldered salt an pepper shakers. Engine code returns 11. Tested fuel injectors out of car and back probed through computer. All work fine. Any thoughts?

 

[General karthief]

I have a 90 GT with a replaced .30 bored out 302. Stock throttle body. New IAC, TPS new and dialed in. I have replaced everything. I have sent my computer off to be rebuilt twice. New distributor, 24lb injectors with matching MAF, 39lbs of fuel pressure. New fuel pump & filter. Replaced all fuseable links. I ran the "no start checklist" multiple times. The engine starts every time and immediately stalls. I monitored fuel pressure and it is within specs. I spray starting fluid in intake and engine stays running. New fuel injector harness. Removed and soldered salt an pepper shakers. Engine code returns 11. Tested fuel injectors out of car and back probed through computer. All work fine. Any thoughts?

Start a thread with details on modifications and work you've already done to try to correct this issue, it can get confusing when piggybacking onto another thread.