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

Rob Petrie E395 · 07-08-2014, 08:37 PM

Try taking the line off of the relief valve and cranking it. During cranking NO fuel should bubble out. If it does bubble out it means the valve is not sealing properly and that causes it to not build pressure fast enough to start. If you have a gauge you can check it that way too but most guys dont that is why I suggest what I wrote above.. Should build to 6K pretty quick it needs 4k start.

07-08-2014, 08:37 PM	#2
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,092 Likes: 162 Liked 216 Times in 77 Posts	Re: Hard Starting 2003 common rail Cummins ??? Try taking the line off of the relief valve and cranking it. During cranking NO fuel should bubble out. If it does bubble out it means the valve is not sealing properly and that causes it to not build pressure fast enough to start. If you have a gauge you can check it that way too but most guys dont that is why I suggest what I wrote above.. Should build to 6K pretty quick it needs 4k start.