2002 ford f250 7.3 Turbo diesel no start - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 5 (permalink) Old 04-07-2011, 06:49 PM Thread Starter
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2002 ford f250 7.3 Turbo diesel no start

Okey here whats wrong i had been driving the truck every dad normaly and randomly one day i had shut the truck off when i got home next day come back it wouldn't start. It cranks over fine (has new batteries and starter) but wont fire. So i sprayed a little starting fluid in and it started up and ran fine and good like normal, drove it around and every thing , turn the truck of and go to start again it wouldn't start so it only starts on starting fluid. Then next day i go and it started up fine that week i was leaving to go camping so i was taking the truck, so as we were going to the place it was 2 hrs away. We stopped by a store and shut it of went inside the store came back out it wouldn't start, sprayed some starting fluid and it started up and we drove it there once we got there we parked. 3 days later it would start up again when we were leaving and finally when we got home it wouldn't start, its been a whole winter and it still wont start since it got warmer outside i decided to start working on it again and i cant figure it out i replaced the injector computer and that wasn't it maybe its engine comp? it seems to have a delayed throttle response and loss of power, when i hooked up the scanner it didn't show any codes and engine light inst on. And the injector relay isn't clicking when you turn the key? Also it is getting fuel, fuel pump is working you can here it, even if engine is warmed up it still wont start withought ether Please help need to get it back on the rode.
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post #2 of 5 (permalink) Old 04-07-2011, 07:23 PM
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If the check engine light was on there are codes. Your code reader may not be able to talk with the diesel computers. Try unplugging the ICP sensor and try to start it. It is the sensor on the drivers head, on the inner side all the way towards the front. It sort of sticks straight up. Check the connector for oil in it while it's unplugged.

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post #3 of 5 (permalink) Old 04-07-2011, 08:14 PM
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Please stop using starting fluid on it. These trucks have glow plugs that can ignite the starting fluid prematurely and could cause major damage or serious injury. If you absolutely HAVE to use starting fluid, at least disconnect the glow plug relay to disable the glow plugs.

Your problem sounds like an intermittent electrical problem, possibly with the ignition switch (mounted on the steering column just inside the fuse panel access). It could also be either the IDM or PCM relay that isn't pulling in properly.

If your scan tool didn't pick up any codes, it must be a generic tool, most of which aren't capable of pulling codes off a PSD. Like Tom said, if the check engine light was on, you WILL have codes stored.

His suggestion of disconnecting the ICP sensor is a good one to try also. It will cause the CEL to come on when you do that, but the computer will use default values to run the engine.

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post #4 of 5 (permalink) Old 04-08-2011, 10:01 AM
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If he is able to get it to start and run on ether each time it won't start on it's own then I would suspect some kind of intermittant failure of the glow plug system.

IMO ether is safe to use on these engines if you know what you are doing. One thing you don't do on ether is let the glow plugs run - you spray and hit the ignition immediately. Use *sparingly* like the smallest little burst you can manage is enough.

I could not tell for sure from his post if the CEL was on or not but I think he said it was not. I believe "inst" s/b "isn't".

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post #5 of 5 (permalink) Old 04-09-2011, 11:01 AM Thread Starter
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Yea i understand what can happen with ether i just use one little squirt, But anyways I had unhooked The ICP sensor and the truck didn't start, check engine light did come on when i did this. And i had somone come when it first died in the summer who works at a dealer ships and he had a good computer that was meant for diesel to, and it didn't show anything when he hooked it up to the computer. Were are the IDM relay and PCM relays located? And i noticed that the glow plug relay isn't clicking?

Last edited by orest100; 04-09-2011 at 09:23 PM.
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