New to tuning. Hard start. trying to tune Idle

Hi new to Tuning and I have a couple questions. first when trying to start cold it cranks and backfires i stop cranking and go back to cranking and it fires right up. I read a few post where it was the Cam sensor. I put a new one in and still same issue. I checked the wiring. I have 12 going to the Cam sensor with the key on. I have been following Rinkrat456 idle guide. it idles decent, surges a little up to I cut in the LTFM after doing the Idle airflow. then it runs a little rough. can someone take a look at my tune and see if there is something they see and point me in the right direction.

2003 Chevy 2500hd 4x4
6.0l w. NV4500
cold air intake
shorty headers
Cam is a BTR Truck Torque cam

thanks

Do you have any codes? It is does sound like a missing cam sync, the car will start 50% of the time as it takes a stab, it's like the distributor being 180 degrees out.

Can you log these?


Attachment 116772

Idle spark and fuel trims look fine, you need to add more logging channels, see what is available in the scanner in engine idle section and add away.

Are you Drive by Wire or Drive by Cable?

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Originally Posted by dhoagland

Are you Drive by Wire or Drive by Cable?

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It's DBW.

It ended up being a bad cam sensor. I got kicked and got 2 vad ones from the parts store. I put the old one in from before rebuild and starting problem went away.

Quote:

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Originally Posted by 03ChevyCrewCab

It ended up being a bad cam sensor. I got kicked and got 2 vad ones from the parts store. I put the old one in from before rebuild and starting problem went away.

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Yep, so many cheap poor quality parts on the market these days, pay the extra get Delphi.