Weak Start Diagnostic

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08-22-2011, 10:24 AM

Dieselhead1052

Diesel Fan

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Join Date: Jul 2011

Location: San Diego, CA

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Weak Start Diagnostic

Hey guys. I think the 7.3L might have a weak fuel pump. Its loping like a cammer for 1-2 seconds when you start it up.

Here are my Troubleshoots. Remember i'm a novice.

I can start it at any given time after its been off for about 1/2 hour and it will start as described above.

I started it on a hill the other day, twice, and it died after first crank both times.

Once its started and during flight, it runs fine, no hesitations and i don't think i have any loss in power.

When i start it there aren't any lights that come on or any gauges that read irregularly. (keep in mind i DO NOT have a Fuel Pressure Gauge)

I changed the fuel filter 3k ago.

I changed the oil 3k ago.

It hasn't died in flight yet, and i don't want it to, its my only rig for now. Any help would be greatly appreciated.

DC

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08-22-2011, 12:10 PM

95powersmoker

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Join Date: Mar 2010

Location: Ellensburg, WA

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Just check fuel pressure at the schrader valve on the fpr... The loping sounds like a possible hpoil issue to me, whether it be injector orings or ipr orings... Do you have access to a scanner?

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