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Nov 9, 2005 | 06:43 PM

#16

Superduty

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Joined: May 2005

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Have the dealer put a scanner on the engine and watch the fuel rail pressure. The ECM won't fire injectors until the pressure is up in the rail. Check for a leaking rail pressure relief valve leaking injector connector tubes. Make sure they are torqued tight.

It could also be the fuel pressure controller on the back of the CP3 or the fuel pump supply to the CP3 or air in the lines.

My 05 engine starts right up after sitting for a few days.

Nov 9, 2005 | 10:16 PM

#17

bigblock2stroke

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Joined: Feb 2004

Posts: 1,147

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Quote:

Originally Posted by riata_ag

I know on the 2002 Dodge cummins and back the compression ratio for the engine was listed in the back of the owners manunal. When they changed the engine in '03 they omitted that information from the owners manual.

I am betting the 03-06 cummins have a compression ratio similiar to a big block gas engine? This is only a a guess as I have no knowledge of either.

The old engine started really easy and was very fuel efficient becuase of high compression, is my thought.

Does anyone know what the compression ratio is on a common rail cummins?

I can't remember what it was on my '02, can someone with an older dodge look up the ratio and post it for comparison.

Thanks

Engine wouldn't run at 10:1

They are 17.2:1 for 03 and 06

They did bump the compression back in 2001 for the 245hp engines. that's why they were so loud. Even louder than the 98.5 to 2000 vp44's

Nov 10, 2005 | 07:48 AM

#18

TPilaske

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Joined: Aug 2002

Posts: 1,395

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From: Flat Rock, MI

Didn't think mine was going to start this morning... it was slightly colder outside, but mines in the garage... took a good 4 or 5 seconds to fire up...

Tony