CLASS RACER FORUM - View Single Post - Hard Starting 2003 common rail Cummins ???

Run to Rund · 07-24-2014, 08:45 AM

A big reason why these common rail systems need new injectors and sometimes the pressure relief valve is that Bosch wanted 4 micron or better fuel filtration, but such filters weren't readily available until a couple years ago. The Rams came with 10 micron filtration, and later 7 micron was made available. Commercial diesel fuel in this country often has up to 15 micron particulates.

07-24-2014, 08:45 AM	#4
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: Hard Starting 2003 common rail Cummins ??? A big reason why these common rail systems need new injectors and sometimes the pressure relief valve is that Bosch wanted 4 micron or better fuel filtration, but such filters weren't readily available until a couple years ago. The Rams came with 10 micron filtration, and later 7 micron was made available. Commercial diesel fuel in this country often has up to 15 micron particulates.