Hi guys I think I may need some help....
I have a 2008 6.4 PSD
It has been stock up until this past week.
I installed an SCT LIVEWIRE with AFE 4" DOWNPIPE BACK EXHAUST. There are five custom tune levels supporting DPF/CAT delete. Also EGR is disabled.
While running tune three which is supposed to be dyno'd at 401hp/778lbft @ Rear wheel, I experienced a DTC 2263 with moderately hard throttle.
I began keeping an eye on boost and I was boosting to 40 PSI and above with 33-40 percent throttle accelerating up a mild grade. Also, experiencing same with a passing situation on interstate in which I felt was 'normal' everday encounter.
I cleared DTC and began to watch the guages. My MAP was 14 PSI and EBP was 52.79 PSI KOEO. I thought I had a bad EBP SENSOR AND TUBE and replaced both. However, this did not change the readings.
BTW the mileage was impressive 17/22.
I switched to tune 2 which was a step down from the above tune. It did not overboost, but does hug 40 PSI on a hard acceleration, bad thing though is mileage is not the best 14/17.
If it matters, I still have the stock air filter.
So...... My question is, 1) why am I overboosting??? I want to run this tu e because the mileage is great!
2) is it Okay to boost over 40 PSI???
3) won't it be worse with towing?
Any help is appreciated!!!!