'93 7.3 won't stay running - Pirate4x4.Com : 4x4 and Off-Road Forum

Ben W · 10-26-2004, 06:29 PM

My father-in-law's 1993 F250, non-turbo 7.3 started acting up yesterday. It will start and idle fine, but when you rev it up, then let off the throttle it dies. Hit the key and it starts right back up and idles fine.

It drives fine, but won't idle after it is revved. But it starts right back up every time. Any ideas?

jaluhn · 10-27-2004, 09:08 AM

Sounds alot like some sort of injection pump screwness. See if you can find some standyne performance formula fuel additive (try the ford dealer - it's sold in 1 pint bottle with a red label) The power service additive you can get from walmart is also acceptable. Then, pull the fuel filter (good time to replace it if needed), drain some of the fuel out, and pour the entire bottle of addative in. Then run it. She may run a bit funny at first, but this meathod usually works to free up sticking injection pump parts.
-John

64Trvlr · 10-28-2004, 10:57 AM

Have you checked the fuel filter?

SilverZuk · 10-28-2004, 01:23 PM

Quote:

Originally Posted by 64Trvlr

Have you checked the fuel filter?

That was my first thought too.

10-26-2004, 06:29 PM	#1 (permalink)
Ben W Granite Guru Join Date: Feb 2000 Member # 226 Location: Yakima, WA Posts: 4,058	'93 7.3 won't stay running My father-in-law's 1993 F250, non-turbo 7.3 started acting up yesterday. It will start and idle fine, but when you rev it up, then let off the throttle it dies. Hit the key and it starts right back up and idles fine. It drives fine, but won't idle after it is revved. But it starts right back up every time. Any ideas? Last edited by Ben W; 10-26-2004 at 06:31 PM.

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10-27-2004, 09:08 AM	#2 (permalink)
jaluhn Rock God Join Date: Mar 2003 Member # 17947 Location: Santee CA Posts: 1,338	Sounds alot like some sort of injection pump screwness. See if you can find some standyne performance formula fuel additive (try the ford dealer - it's sold in 1 pint bottle with a red label) The power service additive you can get from walmart is also acceptable. Then, pull the fuel filter (good time to replace it if needed), drain some of the fuel out, and pour the entire bottle of addative in. Then run it. She may run a bit funny at first, but this meathod usually works to free up sticking injection pump parts. -John