12 Silverado Hard Start

[Turbostangs90]

The guy had a cam installed. 5.3ltr with a BTR stage 4. Im pretty certain the cam card showed apprx 5 degrees overlap. Now ever since the truck has been really hard to start. Ive messed with cranking VE, the timing tables....but nothing seems to be helping. Tune attached, maybe im not seeing something.

[AlbaderQ8]

Try this

[Turbostangs90]

Try this

Thanks for the help, but the cranking process is still dragging and taking a really long time.

[regorih]

try this Phil.TuneRevision06.Repository2 (3).hpt

[SultanHassanMasTuning]

^yes that should help

[Turbostangs90]

Thanks a lot guys, He is coming over this evening and Im gonna flash it in to see how it helps.

[Turbostangs90]

Ok I tried this tune...it didnt help. The high Base Running Airflow had the idle super high, and the Start Up Air Flow had the inital idle right at start up very high. Once I lowered them both back down to where I was originally the rpm's at start up and idle where normal.

All that was done on this truck was a DOD delete and a cam swap. It shouldnt be so hard to start. He is getting an intermittent cam sensor error, and I told him to try changing that. The truck runs great except for the extreme long time to start.

[catdiesel04]

Ok I tried this tune...it didnt help. The high Base Running Airflow had the idle super high, and the Start Up Air Flow had the inital idle right at start up very high. Once I lowered them both back down to where I was originally the rpm's at start up and idle where normal.

All that was done on this truck was a DOD delete and a cam swap. It shouldnt be so hard to start. He is getting an intermittent cam sensor error, and I told him to try changing that. The truck runs great except for the extreme long time to start.

Check the jumper plug for the cam sensor. I had a buddy bitten by that during a TSP cam swap. The jumper appeared to be ok, but when checked with an ohm meter it had high resistance.

[castorjames]

check cam counts on VCM scanner