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Old 02-01-2010, 02:15 PM
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Truck died while driving

I have a 2002 f250...I have a dp tuner and slight modes....So on the way to lunch today truck died driving about 35... Pulled into a lot and it refired. Got about 200 ft and dead again..This time cranks but wont fire...I did notice the display on the DP went dead...I pulled the computer and removed the DP just in case I had a bad connection at the ecm....I pulled it back to work and replaced the cam sensor still nothing....I checked all the fuses and relays....Had it towed home and got out my spare stuff from another project "long Story"....I swapped out the ecm and idm...nothing.... Checked the fuel pump and no power to it...I swapped out the relays under dash and under hood, removed the ignition switch and no burns or bad smell....

Sorry that was so much but i figured all the facts so far would help....So it looks like ive lost a power feed somewhere...The best I can tell the computer,idm,and fuel pump are not getting power...I also tripped and reset the fuel pump impact switch....So what am I missing....Are the ignition switches bad about going out...Is there a fuse link to check....I dont have a wiring diagram,Ill do some looking online for one......Any help would be great...Thanks Matt
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Old 02-01-2010, 03:10 PM
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Add to above..No tach movement,checked all fuses again,checked post near airfilter where fuse links attach.... EDIT:: all lights on dash work...Are there any fuse locations other than under the drivers side dash???

Last edited by 240 spoke; 02-01-2010 at 04:31 PM.
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Old 02-02-2010, 06:56 AM
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Do you have a WTS light? Have you tried scanning for any codes? On some models there is a relay that controls power to the fuel pump, it is located under the radio, you can get to it by pulling the ashtray and the cup holder. But on most 2002 it is built into the fuse box. You need to get a schematic and trace power back as far as possible. If you have power going into fuse box, but not coming out, I would say you found the problem. Here is a thread that may help.

Fuel pump not getting power
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Old 02-02-2010, 07:08 AM
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OK I verified that 2001 and older have the relay under the radio, so yours is not serviceable and built into the fuse panel. You didn't say how you were checking the fuses but if it was just a visual that doesn't always work. Use a test light or multimeter to make sure they are good.
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Old 02-02-2010, 10:10 AM
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Well I did check the fuse visually..I also check the with a test light....I do have a wts light and all the others work...No tach op, I pulled the case apart on a spare relay that I have so I can check to see if its pulling in... I also removed the ignition switch took it apart and cleaned it...It looks ok.The contacts were dirty but not burned up....I was looking for the pump relay and didnt find it so it must be inside the fuse block...I pulled the fuse block to check the wires on the back for burns,it looked good... When this whole deal started I noticed that my DP tuner control went out and it hasnt been back on since..I removed it in case i had a poor connection... So the best I can tell ive lost power to the ecm,idm,fuel pump...Ill remove the fuse block and give it another look...Ill try to find one in a scrap yard....Can you get the fuse blocks apart? Thanks NCHORNET I got your PM...... Are there any free wiring diagrams online??
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Old 02-04-2010, 03:04 AM
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Hey NCHORNET I took apart my fuse block and there are 5 relays in that box..I have some pics but dont know how to load them on this site..... I have a scantool on the way.....Thanks for your help.... Hey what part of NC are you in?
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Old 02-06-2010, 02:37 PM
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bump any other ideas
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Old 02-06-2010, 07:40 PM
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You said all were good, but i'd replace the number 30 fuse under the steering wheel and pull the plug on the fuel heater on the back side of the fuel bowl.
The #30 fuse runs the fuel heater and ..... the PCM, your fuel heater shorts out and your computer quits....
I have a Chilton's wiring diagram so I'll look...
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Old 02-07-2010, 08:37 AM
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Quote:
Originally Posted by the1laf View Post
You said all were good, but i'd replace the number 30 fuse under the steering wheel and pull the plug on the fuel heater on the back side of the fuel bowl.
The #30 fuse runs the fuel heater and ..... the PCM, your fuel heater shorts out and your computer quits....
I have a Chilton's wiring diagram so I'll look...

Thanks for the reply...I did get it to start for a few minutes...Long enough to get it in the shop.....Im pretty sure its the fuel pump relay in the cjb....I got all the wire colors..Im going to check voltages and grounds and possible tie a relay into the wires and go from there....Ive done a ton of searches on all the psd forums i could find and people have had problems in the past....Thanks again Matt
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