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JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
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Opinion: Issue with 2000 F250 7.3L Diesel Automatic
Rather than give my opinion, let's see what other people have to say especially since I seem to have failed.
Fuel injectors aged out, truck started running like #&*@#$*(@ and had zero power. Replaced injectors with new stock, nothing performance just straight factory spec. While I was in there, new glow plugs. New cam sensor New injector controller (on top of motor, easy access) New fuel pump on the rail under the driver's seat (it had a couple hundred thousand miles on it (Bosch pump)). New fuel filter/water separator. 325,000 miles or so, truck is stock with zero performance chips/gear ever added. Starts with difficulty, wants to crank a lot before catching. Used it to pull the hay in from the field, a few thousand pounds pulling a trailer. about 10 MPH, ran without issue. Worked it for several hours moving hay and equipment. Still not starting as well as I would like, wants to crank a lot before catching. Get on the road, start adding speed, shifts into second and dies at about 25 mph. Very difficult to re-start. Have to cycle the pump about four times before trying to start. I have thoughts and opinions but want someone outside of me to think on it. I have missed the mark in my actions, I know there are much smarter, more experienced people here than me!!! Need to get my old truck back on the road!
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David '83 SC Targa (sold  ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
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10-04-2021, 02:40 PM
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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 14,585
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Air trapped in the fuel system ? When my Duramax lost prime due to aging fuel filter housing it acted similar to what you are saying . My other thought based on your mileage is your injection pump starting to age out . As you know these diesels run a VERY high fuel pressure . If the pump is down on pressure maybe injectors can't operate properly .
I am assuming your truck has a mechanical fuel pump like my Duramax , if that is not correct then disregard . Good luck and update us with the results .
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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10-04-2021, 02:58 PM
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Parrothead member
Join Date: Jul 2003
Location: Monmouth county, NJ USA
Posts: 13,829
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Bad glow plug modules possibly.
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Vinny Red '86 944, 05 Ford Super Duty Dually '02 Ram 3500 Diesel 4x4 Dually, '07Jeep Wrangler '62 Mercury Meteor '90 Harley 1200 XL "Live your Life in such a way that the Westboro Baptist Church will want to picket your funeral." |
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10-04-2021, 03:03 PM
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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,846
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hpop ?
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No left turn un stoned |
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10-04-2021, 03:46 PM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,770
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It seems around 2000 when the 6.0 was being developed that some of the 6.0 systems were used on the 7.3
My 2003 6.0 PSD developed some hard start, drivability problems overnight... The 6.0 uses a FICM (fuel injector control module) The late 7.3 uses an IDM (injector driver module) I think both serve the same function... though the FICM is more complex since it is newer.. Find out how to troubleshoot the IDM.. You have replaced everything else..
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Don't feed the trolls. Don't quote the trolls  http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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10-04-2021, 04:21 PM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,770
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Oops looks like you replaced it....
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Don't feed the trolls. Don't quote the trolls http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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10-04-2021, 04:22 PM
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Brew Master
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IIRC the fuel filter housing is notorious for letting air in. There's also a "50 cent mod" that tightens up some connectors under the valve covers that come loose and can cause hard start/no start
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Nick |
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10-04-2021, 04:58 PM
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fancytown
Join Date: Aug 2002
Location: DEE-troit
Posts: 1,726
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Keep in mind the HEUI injectors also need high pressure oil to actuate. Make sure the HP oil pump is operating properly, along with the IPR (injection pressure regulator) valve.
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all cars sold. |
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10-04-2021, 05:56 PM
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JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
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Thanks all!!!
The 2000 uses an electric fuel pump, the method to remove air, as I understand it, is to cycle the pump four times to add pressure and fill the filter bowl. Then the air is pushed out of the system. I could have this wrong. I miss the easy burping method on the SC to get fuel to the injectors. I thank you for the HPOP idea, had not gone there! I will take it apart and see if I can tell anything about it's condition. May just have to plug and play at the end. My little tester did not receive any codes from the electronics. I do know the injectors were bad. They were visibly worn and had been in the truck since day one. I could have incorrectly diagnosed the fuel pump as the issue. The IDM is definitely different from the control module I replaced when I look up the part. I now believe what I replaced was the glow plug relay, so maybe a poor choice? But the unit did test bad and the truck started immediately after I replaced it. hmmmm
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David '83 SC Targa (sold ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
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10-04-2021, 06:06 PM
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Brew Master
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If you've never gone to the site, Ford Truck Enthusiasts was always my go to when I had my 7.3
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Nick Last edited by cabmandone; 10-05-2021 at 02:29 AM.. |
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10-05-2021, 02:08 AM
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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 14,585
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I am curious , if you cycle the electric fuel pump four times does it start better ? If it does that tells me that fuel pressure is bleeding down when it should not . Does your fuel filter head have a mechanical primer on it ?
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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10-05-2021, 02:18 AM
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fancytown
Join Date: Aug 2002
Location: DEE-troit
Posts: 1,726
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The Navistar version on the 7.3L had a filter mounted primer, but not the Ford. Navistar used a mechanical pump, and it didn't have suction capability.
The low pressure fuel system bleeds itself very quickly. You can verify by removing the filter cap. Might be good to drain a slight amount from the water drain so it doesn't spill. I was an Engineer at Navistar, and while most of my work was on the 6.0L, I started with the Navistar truck version of the 7.3L. I adapted that powerstroke filter to use on the 6.0L Navistar variant because Ford switched to a vehicle mounted electric pump/filter/water separator with the 6.0L.
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all cars sold. |
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10-05-2021, 04:43 AM
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Brew Master
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Quote:
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Nick |
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10-05-2021, 05:14 AM
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Registered
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no clue. but my friend has a 7.3 with a manual transmission. that thing is a beast to drive. fun.
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poof! gone |
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10-05-2021, 07:22 AM
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1985 Porsche 911 Cab
