Ok 2004 Early build. 2290 code give it skinny peddle ICP stays low around 700 to 800 and IPR goes up to 80%+. Let off and ICP shoots up over 1000 and IPR drops to 30%. Truck isn't making boost either only making at 15. My HPOP I know bleeds down when sitting over night I'm guessing it is time to replace?
Ok just quick update. Been on vacation so I haven't had a chance to see what would happen on cold start. Was parked nose down as always but took aroung 6 seconds of cracking to build any pressure. When it did fire up pressure was reading in the 800 and IPR was in the mid to upper 30s. Absolutely no power. Guess ill get to have some fun in my driveway pulling HPOP.
thats right. my bad. i forgot to see the year of ur model. i dont suppose the early build 04 have the STC fitting, right? or does it? correct me if i'm wrong, guys. i'm sorry. i was in my own little world.