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Power Loss and Surging Issue. HELP!!!
I am going to try and be as detailed as possible with this issue. I have already started the trial and error/ process of elimination repair solution. This has been happening for about 8 months now.
What it is doing:
-Cranks a long time before it will start (5-8 seconds roughly) whether first start or 10th of the day.
-I am going to school on the sea coast and the truck runs fine in the lower elevations. When i am at home (much higher elevation) the truck surges around 50-60 mph and the turbo wont boost it just bucks and surges/ cuts in and out and looses power. If i stomp it to the floor it will come out of it.
-With the SCT turned on it has good power, If i turn the SCT off it couldn't get out of its own way.
What I have done:
-Replaced EBP sensor twice and the EBP sensor tube.
-Head Gaskets and studs.
-Cleaned turbo and had examined by three different mechanics.
-Has an EGR delete
-Matt Robinson's tunes erase the EGR trouble codes.
-HPOP was replaced two years ago
-Ordered a new MAP sensor haven't installed it yet though
I am just completely at loss as to what is going on here and getting really frustrated, any help is greatly appreciated!
2006 F-250 FX4
4" Turbo Back
SCT w/ RCD & Gearhead Tunes
ARP Studs w/ Black Onyx Gaskets
Sinister EGR Delete