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Old 01-13-2013, 10:41 AM
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Another No Start

I'll start off with a little history. Started with a slight rough idle and an exhaust leak in 1 up pipe. Up pipe was replaced. After up pipe was replaced I got a code for 2 glow plugs. I decided to change out the UVC's, valve cover gaskets and glow plugs since I have 240,000 miles on the truck. Still had the rough idle. While trying to diagnose further with AE truck stopped starting. Found that fuel pump was not working. Replaced pump and still no start. The tach does bump up during cranking. No smoke until end of cranking I get a small puff of white smoke. Monitoring with AE during cranking I get the following:
ICP pres - 2000 - 2300
RPM - 140
Pulse width - 3.6

The only other thing I noticed is a buzz that I don't recall hearing when turn ign on just before the WTS light goes off. The buzz is coming from the area of the IDM. Possible bad IDM?
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Old 01-13-2013, 10:47 AM
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Your IDM is located IN the front drivers side fender, you hear a buzzing in there?

Next I would take the AE and run a Buzz Test. If the IDM is bad you'll know...

Also what does the AE say about the IPR% ?
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Old 01-13-2013, 12:49 PM
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The IPC Duty % varied between 38 - 42. I ran a buzz test and all sounded normal. I'm pretty sure that buzzing sound is coming from the IDM. It sounds similar to the start of the buzz test just not as loud.

My batteries have run down so I've got them on the charger
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Old 01-13-2013, 03:24 PM
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Lets start from the beginning, You're sure the pumps running now? Can you confirm that the filter housing refills as it should? Open the drain lever, watch what comes out of the tube, close it then turn the key on for 15sec. and look at what comes out again.

The IDM, I would think, has to be doing it's job if it will buzz the injectors OK.

Your IRP% seems too high, (with the ICP pressure you're getting) this can be from stuff like the injector O-rings or something allowing oil to bypass. Basically there's plenty of oil pressure from the pump (ICP shows good pressure available) yet the IPR is having to stay open for a long time to maintain. Where's all that pressure going?

Cranking with low batteries is never good (the PCM won't even try to start under 100rpm) so, Yea, get them back up again before you go any farther...
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Old 01-14-2013, 09:03 PM
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Now more problems. Charged the batteries and had them load tested. Batteries are only 6 months old. Both batteries are real good. Put them back in and 1st try volts went down to 10.2 and then to 9.6. It seems I have an electrical problem. I checked all the grounds I could fine and all were nice clean and tight. Strarter going south? Is there any way to test it in the truck or do I have to remove it?
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