Engine/Transmission (1998.5 - 2002) losing boost

[HOSSBOBCAT]

Ok heres what i got I can be running fine weather towing or empty most the time it starts in fourth gear. and then problem continues in 3rd and 5th. my turbo will be spooling fine and half way through 4th gear I will lose boost down to about 10psi. most of the time I can fix the problem by downshifting hard with the e-brake and boost will pick back up but now i have lost the e-brake I dont now the problem there but my boost problem still lercks me. I did have a nut missing on my tubo gasket fixed that and still losing boost. althought I still need to replace the gaskit itself theer is very little leakage if any. my vp 44 is less than a year old as well as my fass system. I took off the wastgate and it is moving freely. I also have a smarty set at 9 I am going to reset it to stock tommorw to check it. Help help help I haul my excavator everyday and this is becoming a pain in my *** thanks in advance guys.

 

[brianv31]

Can you sustain a normal level of boost pressure in the lower gears?



Provide some information about your truck please.

 

[HOSSBOBCAT]

yes i can sustain normal leval of boost. My truck is a 99 3500 I have a 4 in banks exaust + ram air ats manifold 75 horse injectors new. smarty on leval 9 banks e-brake fass fuel system and new injector pump about a year old