This morning I am going to get on the freeway and I start to climb the overpass to make the loop around and I notice that the truck is REALLY sluggish. I get on to the freeway and start moving along when I notice that I have no power. (truck is back to stock from DJ's xtreme street from late last night) As I am in the slow lane on the freeway I notice that I cannot get about 55 mph. I also see that my boost is no more that 10 psi. When I try to floor it the boost actually drops to about 5. (boost guage tied into map sensor) Still in the fast land at about 55 and a Utard minivan riding the HVYW8 big time.
Then all of the sudden the boost kicks in and I have no issues and I am moving along nicely at 70 mph. Then the same boost problem again. Then the boost kicks in and no problem. So I am pushing the pedal to the floor repeatedly to see if I can hear the turbo and I can but then the same thing would happen again. Yesterday the truck was running like a champ with the custom tune and now I am bewildered.
I am planning to leave tonight or tomorrow for a 4 hour trip to pick up a 26 ft camper trailer from Utah to Star Valley, WY. So my 3 questions are; What is making the turbo do this? Should I curtail my towing trip until I have this worked out? If I put the tune back on would it solve the problem.
