02 7.3 wont start - Ford Powerstroke Diesel Forum
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Old 01-18-2013, 04:39 PM
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02 7.3 wont start

My 7.3 has been stalen for a second the keeps running almost instantly. Its been hard to start when its cold the past couple days. This morning I had to give it some throttle to get it to crank up this morning. Turned off at about 5 waited 30 minits cranked back up then died after about 5 seconds. Havent been able to get started sence. Ive replace the cam sensor and ipr probe and sensor. Help
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Old 01-18-2013, 07:30 PM
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have you checked for codes? how about fuel? have checked the bowl? does the oil pressure gauge rise when cranking? any smoke out the tailpipe when cranking?
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Old 01-19-2013, 10:00 PM
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When it's turning over does the Tach. move? The CPS causes a no-start and no-Tach. and a stall problem. I worked with the highway safety commission on the recall of these senders. If its still offered, Ford will replace it for free.
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Old 01-19-2013, 10:22 PM
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Sorry, I had to think about this one for a while. When I started my new fuel system I installed a exturnal regulator. I kept moving it up untill I hit 150psi. The Ford pump stalled about a mile from home. After a tow from my son I was checking everything out and ran a jump wire from the battery to the pump. It arced when I touched the terminal and took off again and never gave me a problem. The pump will not tolerate 150psi. There is no performance gain past 105psi unless you raise the HPOP up to 3400psi. I ended up with a big pusher pump at the tank and 2 150psi Walbro pumps up front. One on each bank. I never could find another pump that would run at 150psi all the time.
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Old 01-20-2013, 06:00 AM
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The tach isn't supposed to move when cranking on an '02...
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Old 01-20-2013, 02:55 PM
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Thanks. I thought they all did. Does the tach have its own sender?
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Old 01-20-2013, 03:30 PM
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The CPS is what the PCM uses to determine the engines rpm and was used to drive the Tach more directly before the mid-'01 electrical upgrade. The Instrument Cluster operated differently after that (the new cluster has a digital Odometer and a Trans Temp Gauge). The PCM now Totally is in charge of driving everything in it and, though the CPS is still uses to determine the rpm shown on the Tach, it doesn't send that signal there before the engine starts...
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Old 01-20-2013, 11:35 PM
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Yes codes showed up only for the mods( over boost, wast gate fail) things like that yes I'm getting fuel to the bowl I'm not sure how much pressure though. The oil gage moves a little, the tach doesn't move at all. No smoke either but here's an update on the truck. I hated to do it but I got ether and it cranked up then idled rough. Gave it some throttle and it warmed up and started idling fine, I drove it to the shop ran a scanner and tests on it and every thing checked out. Then I let it sit for a little bit, then cranked on it, it cranked up then after about 5 seconds it dies out and won't start again until I shoot ether into it.
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Old 01-21-2013, 05:04 AM
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run an injector buzz test. could be uvch(s)
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Old 01-22-2013, 05:08 PM
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Buzz test checked out okay
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