My truck runs good, smooth, good economy, but is slowly losing power. I have cleaned the IAT. Any ideas? It used to be very powerful for a stock engine but is now slowing down on the hills. I thought that it was the crack in the exhaust manifold, but that has been changed. Air cleaner is clean, fuel filter is new, pump pressures are high (10+ WOT)turbo impeller is tight (no slop) getting near 205,000 miles. Thanks guys

 

Does your truck have a cat? If so, that may be the cause of the slow loss of power?

 

[quote author=Mexstan link=board=4;threadid=16205;start=0#152117 date=1056316026]<br>Does your truck have a cat? If so, that may be the cause of the slow loss of power?<br>[/quote]<br><br>Should be no cat involved if it is the 99 in his sig, and in Alabama.<br>Could be first signs of an injector pump going, but I don't know enough about it to say anything for sure.<br><br>Chris<br>