[brockmarcotte]

On the freeway my truck will either 1)take forever to accerate anymore unless let off the gas and then try to gain some boost again.
2)wont even let me accerate hardly at all....this is when im going about 70mph on the freeway (not with a cold engine)...any suggestions?

 

[InnovativeDiesel]

Have you changed your fuel filters lately?

What kind of boost are you making? Any visible smoke when you are losing power? If so, the turbo may be sticking open.