6NZ Caterpillar boost pressures

[94.5 Stroker]

I've got a 2002 T600 with a 6NZ Cat with a 18 speed. Has about 1.3 million miles on it, its only pulling about 20 psi boost loaded. It has a duralite CAC put in about 4-5 years ago. Fuel mileage has tanked( was running north of 6.5 now down to around 5.5-5.6), no power and don't pull as well as used to. Any ideas to look for before we take it in?

Thanks Cody

 

[Big Angry Hillbilly]

check the air-to-air for leaks, boots, the usual stuff. Check and make sure there's no exhaust leaks, and make sure the air filter is clean.

Any additional smoke from the stack? What color if so?

 

[HOOV3R]

Check fuel pressure also.

 

[Dzchey21]

yeah i would start with fuel pressure should be like 75 psi if i remember correctly.

 

[94.5 Stroker]

check the air-to-air for leaks, boots, the usual stuff. Check and make sure there's no exhaust leaks, and make sure the air filter is clean.

Any additional smoke from the stack? What color if so?

Grass burner exhaust, when the air to air went last time the boost was pushing 35 psi

 

[94.5 Stroker]

Will check fuel pressure to, thanks guys

 

[kevin]

Sounds like a torn boot.. check around the springs that wrap around the boots they tend to wear thru there.. or the turbo base gasket check for loose or missing bolts holding up he turbo on

 

[HOOV3R]

Fuel psi should be 70 ish at idle and around 100 at high idle.

If possible, pressurise system through the turbo to test for boost leaks, and spray it down with soapy water.

 

[MoneyWellWasted]

theres either a giant hole in the air to air system or your chargers gettin tired

 

[94.5 Stroker]

theres either a giant hole in the air to air system or your chargers gettin tired

Like I said the last time the air to air was bad it would hit 35psi of boost