It worked in mine when the fuel pump was screwing up. 4.2L V6 though, if that would make a difference, and it's a '98.

Maybe the later ones have a fuel pressure sensor or something and the computer cuts off spark when pressure is low.

 

When mu fuel pump went bad last month I tested using starter fluid and it started. But now it wont

 

We've tried it plenty here in the past, w V8's and 10's, cans of it lol. Even when the pump was working just at low pressure. What kind do you use? I'll give it a go next go round. Works great if the engine is carbureted.

 

I'll take a look tomorrow it's just whatever starter fluid oreillys sells around me.

 

Okay thanks, what's the deal with that "post reply" button ? You put that there lol?

 

Idk it was from the guy I quoted. I was gonna ask the same thing lol

 

Idk either, maybe all that starting fluid melted something.

 

Back to your original post:
"So I have an 03 5.4. I was driving home and all of a sudden my truck starts dying. I'll press the gas and it would go then stop and it finally died so i pulled off to the side of the road. I tried to start it again and it turns over but wont start."

I had the near exact same thing happen to my 97 Jeep Grand Cherokee a few days ago. I put in a new alternator, drove it 5 or 6 times, then it died while driving down the street. I didn't have spark or any power at the fuses in the box by the battery. I put the old alternator back in and it started right up and has run fine. It still has the low voltage reading that caused me to change alt's in the 1st place of course. I guess the new alternator developed a short internally or somehow the circuit failed and the computer couldn't or wouldn't let the ignition system function.

Maybe your new fuel pump did something similar, or maybe your alternator failed that day it died.

 

Getting my truck back tomorrow. Fuel pump failed... it was barley a month old, my luck! Thank you guys for your help I really appreciate it

 

Maybe not the case. Some guys have been successful apparently. I want to learn that trick for sure.