almost stranded... four times!
Thread Starter
|
New User
Joined: Sep 2005
Posts: 4
Likes: 0
almost stranded... four times!
I own a '99 F350 7.3 PSD 300k miles, It has been starting hard the last few months, nothing new, I just plug it in and live with it, but the other day it died on me. On my way home from work I was going 65-70 on the freeway, and it chugged a couple of times and died. I coasted to the side of the freeway, put it in park and turned the key. It started right up. I drove for another few minutes, when I got back up to 65-70, the same thing happened. This happened two more times. The last time I started it, I kept the speed under 40-45, and it ran fine all the way home. When I got close to my house I sped back up the 65-70, to test it, and sure enough, it died again. Does anyone have any thoughts?
Thanks
Thanks
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
Does the tach drop like you shut it off when this happens - Could be the CPS
Another thing to look at is the wiring harnesses under the valve covers and each side of the 42 pin connector over the driver side valve cover for a chaffed or shorted wire
Another thing to look at is the wiring harnesses under the valve covers and each side of the 42 pin connector over the driver side valve cover for a chaffed or shorted wire
Elder User
Joined: Oct 2005
Posts: 786
Likes: 0
From: Reno nv
generally if the tach doesn't move on a 99 during cranking, you have cps problems which sound sorta like what you've got. it also sounds like fuel starvation kinda, but I'm not really qualified there
How old are the batteries and do they test well?
How old are the batteries and do they test well?
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Welcome to FTE turfman.
The CPS these guys mention is the camshaft position sensor. It is highly probable that is the cause of the stalling problem.
The starting problem would be the glow plugs and/or the glow plug relay.
The CPS these guys mention is the camshaft position sensor. It is highly probable that is the cause of the stalling problem.
The starting problem would be the glow plugs and/or the glow plug relay.
Freshman User
Joined: Jan 2007
Posts: 33
Likes: 1
I had a similar problem with my '97 7.3. At highway speeds it would shut down like I had turned the key off. It would restart immediately and repeat the symptom. I had the fuel pressure tested, which was on the low side of the specs. I had the dealer replace the fuel pump, when they removed the pump, the pump shaft fell into the base of the engine. Not a good thing. They told me that the shaft should have stayed attached to the pump, not fall out when removed. With new pump installed fuel pressures were within specs again and I had no further problems with the truck. Hope this gives you some ideas.
sfd512
sfd512
Thread Starter
|
New User
Joined: Sep 2005
Posts: 4
Likes: 0
Diffiicult to do?
Thanks to everybody replying! How difficult would it be to replace the CPS. I'm also going to check the fuel pressure, those symptoms sound similar.
Thanks again
Thanks again
Trending Topics
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Post Fiend
Joined: Jan 2006
Posts: 20,589
Likes: 2
From: Charlotte, NC
Guys....are you sure about the CPS?.....I had that problem last year, and one thing that it NEVER did was conk out while underway.........It only conked out while stopping (almost at a stop), or while stopped. It just bucked and coughed while underway, but kept running.....and towards the end (when I finally got it switched out), it accelerated horribly (like missing a couple of cylinders).
Obviously, it wouldn't hurt turfman to go ahead and change it, but........
Obviously, it wouldn't hurt turfman to go ahead and change it, but........
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
yea, my last one would do it between 65 and 75, the one before that woul do it at low speed only, and the one before that would only do it in park???????? go figure.
But the chugging description has me thinking short in the UVC.
But the chugging description has me thinking short in the UVC.
Last edited by Uzumati; Jan 11, 2007 at 07:49 PM.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Originally Posted by cmpd1781
Guys....are you sure about the CPS?.....I had that problem last year, and one thing that it NEVER did was conk out while underway.........It only conked out while stopping (almost at a stop), or while stopped. It just bucked and coughed while underway, but kept running.....and towards the end (when I finally got it switched out), it accelerated horribly (like missing a couple of cylinders).
Obviously, it wouldn't hurt turfman to go ahead and change it, but........
Obviously, it wouldn't hurt turfman to go ahead and change it, but........
The mechanical pump in the 97 doesn't react quite the same way as the electric pump in the 99. I'm on my third fuel pump and I'm pretty comfortable suggesting that it is not the problem given the stated symptoms.
Posting Guru
Joined: Sep 2006
Posts: 1,081
Likes: 1
From: Montana
I just replaced mine. had to milk it to my friends garage, cause it was much warmer in there than outside. below Zero. but really took about 10-20 min. now I just have to order one again, so I can replace the glove box stash.