Engine/Transmission (1998.5 - 2002) need a little help

[PVanderlugt]

Hey guy's, need a little help, 2002 auto, with gauges,Smarty on #5 from one day to the next starting to make about 4 psi less on the boost. Going down the highway was normaly 7-8 psi and about 700 F now only seems to do around 4 0r 5 psi, temperatures about the same.

Temperatures seem normal to me, maybe a little higher on accelaration, but settle right on down to normal, only 4 psi less boost.

I thought boost leak, removed and inspected all boots, only one with a little damage is pass. side from the intercooler from rubbing on the fender, however not al the way through, pipes are nice and clean,

Reassembled everything and pressuretested to 30 psi, can not find any leaks in the whole induction system, checked horn, all boots and around turbo checked with soap and water, tight as can be.

Checked wastgate, seems to operate normal, snaps shut and moves freely, opens up at 20 psi on the gauge. cant think of what to do next, thought maybe a gauge failure but it seems to do alright , wastgate opens right at 20 psi, anybody have any other suggestions??/



Thanks for the help Pete



PS no codes besides 1693 and 0620 (J hook on turbo), fuel pressure good, never below 12 psi (vulcan), truck does not seem to be low on power

 

[PVanderlugt]

bump thanks Pete

 

[PVanderlugt]

another bump, still looking for suggestions

After hooking the boat up and driving around a bit seems maybee a little bit low on power, and the temps maybee a little bit higher, but it is hard to tell, I do not tow that much. still has all the sympthoms of a boostleak, just can't find one. did check the gauge and it is acurate



thanks Pete

 

[NoSeeUm]

No help Pete, just experience. At 60 MPH my truck empty does about 600F @ ~0-3 psi boost. Before the cam it did about 650F @ ~3-6 psi boost. I did not notice any changes before or after running Smarty.



Jim

 

[PVanderlugt]

I think I found the awnser, p0216, but will get back with some more info later