2001 7.3 Engine problems - Ford Powerstroke Diesel Forum
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Old 08-20-2007, 06:52 PM
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2001 7.3 Engine problems

I have a 2001 ford f250. When I am driving down the interstate around 75mph or pulling a load the SES light comes on and the engine looses a lot of power and shifts funny. If I pull over and turn the engine off and then crank it right back up the SES light goes off and its like nothing ever happened. It does not happen driving around town. It is a 7.3 liter with 200,000. Any help would be greatly appreciated since 2,500 dollars later this problem still exhists.
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Old 08-20-2007, 06:54 PM
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to Powerstroke.org. Post up your codes that will help us help you
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Old 08-20-2007, 08:10 PM
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Snap on scan tool says there are no codes. After researching I am guessing I need A scope on the injectors, CPS, new UVC harnesses. I have had a injector pressure switch, a new IDM and a new glow plug relay installed so far. I figure if I keep replacing stuff I'll get it right sooner or later, its just getting expensive
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Old 08-21-2007, 06:46 PM
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hmm

i would try replacing the temp sensor first 7.3 if the psm thinks the engine is getting to hot the back cylinders shut down and act as cooling pumps.

i had this problem about 1 1/2 years ago i replaced the temp sensor and the truck was good to go
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Old 08-22-2007, 06:52 AM
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If your ses light is coming on you have codes. Is your truck stock?
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Old 08-22-2007, 07:21 AM
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Quote:
Originally Posted by Mike42783 View Post
Snap on scan tool says there are no codes. After researching I am guessing I need A scope on the injectors, CPS, new UVC harnesses. I have had a injector pressure switch, a new IDM and a new glow plug relay installed so far. I figure if I keep replacing stuff I'll get it right sooner or later, its just getting expensive
first lesson learned with a diesel , dont just buy parts without proper diagnosis , and if the light is coming on you have to have codes , do you have a way to get codes puled with a different scanner
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Old 08-22-2007, 12:25 PM
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We're Virginia residents traveling in Colorado. Last Saturday morning my '01 F250 started fine, but within two blocks it started sputtering and missing, it seemed to lose all ower. Ran fine on Friday. I took it to a local garage (not a Ford dealer). The mechanic pulled codes (sorry didn't get the specific codes) that indicated multiple open injectors on the left side. When he removed the valve cover, he found the plug was loose. He was going to order a new harness, but I did some research on this forum and read about the Ford wedges to secure the plug. They sell for ~$17, a lot less than the very expensive harness. I had him order two and do the right side too. I figured it might be ready to come loose as well. I was on the road for about $300 including parts.

I also ordered the FA 1759 AIS and will install it on Friday.
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Old 03-05-2009, 06:56 PM
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I have the same power loss and wierd knocking but I dont have the SES light on.
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