7.3 Engine dies! Need Help

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Sep 25, 2007 | 08:48 AM

Choppermike

Thread Starter

Cross-Country

Joined: Mar 2007

Posts: 84

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From: Perryville, AR

7.3 Engine dies! Need Help

Ok, I have a 99 3/4 with 7.3. Lately the engine dies on me going down the road. It usually does it when I am at low speeds or at idle. Sometimes it catches back up and others I have to restart. It has 151,000 miles on it and I service it regular. I just changed the fuel filter thinking I may have had water in the fuel. I even bought diesel at another place and still the same problem. Sometimes the check engine light comes on when it dies and stays on. If I re-start the check engine light goes off. Anyone have any similar problems? I can not Isolate this to electrical or fuel.
Mike

Sep 25, 2007 | 09:28 AM

drbalazo

Senior User

Joined: Nov 2003

Posts: 258

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From: san diego

I would start with the CPS. Very common on the 7.3 engines. $20 at the dealer and 10 minutes of labor, very easy install.

Sep 25, 2007 | 09:33 AM

redford

FTE Leadership Emeritus

Joined: Sep 2000

Posts: 23,174

Likes: 1,678

From: Stephensville WI

Here is a link to instructions on how to change the CPS, although the part numbers may be out of date.

https://www.ford-trucks.com/article/...ke_Diesel.html

Sep 25, 2007 | 09:35 AM

miller_feed

Hook it, I'll pull it.

Joined: May 2007

Posts: 15,037

Likes: 4

From: Grand Lake, La.

Sounds like the CPS is going out. Get the B code one at your ford dealer for about 25.00. Use a 10mm closed end wrench. Takes about 5 mins to change. That is the first place to start. Cheap fix.

If you bring this down to the 7.3 forum and search CPS there is lots of info about this. Very common for it to go out.

BtW you have a 99.5 not 99 3/4.

Sep 25, 2007 | 09:36 AM

miller_feed

Hook it, I'll pull it.

Joined: May 2007

Posts: 15,037

Likes: 4

From: Grand Lake, La.

Darn, I need to type faster. lol

Sep 25, 2007 | 09:57 AM

hotroddsl

Posting Guru

Joined: Jan 2007

Posts: 2,364

Likes: 3

From: Gilbert Az.

get 2 cps's keep 1 in the glove box put 1 on the truck & she'll be like new, welcome to the only real 7.3 weak spot I got where I could change them in the dark on the side of the road in less than 15 minutes.