03 Turbo Question

[DesertSmoker]

How many PSI of boost should it make?

[PGreenSVT]

depends on the tune.

[DesertSmoker]

Stock tune...

[nylyon]

Even after replacing my Y-Pipe and Up-Pipe (although I think that I have a leak at the manifold too scared to break those bolts) without a trailer I see 20-21 PSI. With the trailer hooked up, I can get to 24 but that's just about all. Usually it's about 20 warmed up.

[DesertSmoker]

I am chasing down the cause of diesel exhaust smell in the motor compartment. 20 is the max have seen too. Trying to find the leak looks like it is not on the turbo side.

[nylyon]

I know that I have a leak on the R/H manifold, the very front bolt is broken. I have no idea how the bolt is broke but I am afraid to even attempt to remove the remaining for fear of breaking more and having to remove the head to remove the exhaust bolts. I am pretty sure that I have a couple of leaks on the L/H side as well, but all bolts are there, yet same fear.

Climb under the truck with a flash light and shine it at the manifold. It is my understanding that some soot is normal, I think that I have more than some.

As for the 20PSI, remember that our 03's have an inferred back pressure so our EBP sensor is not used. Can that be the reason for 20psi? Dunno?

[DesertSmoker]

Thanks for the attachment!

[SickStroke6.0]

Originally Posted by nylyon

Even after replacing my Y-Pipe and Up-Pipe (although I think that I have a leak at the manifold too scared to break those bolts) without a trailer I see 20-21 PSI. With the trailer hooked up, I can get to 24 but that's just about all. Usually it's about 20 warmed up.

I see that you are using an Edge Insight, which is not accurate for reading boost. My Insight CS will top out at 24 while my manual boost gauge is reading 29. You should make about 27-29 PSI on the stock tune, 30-33 tuned. Mine will hit 33-34 in OD if I roll into it.

Originally Posted by DesertSmoker

I am chasing down the cause of diesel exhaust smell in the motor compartment. 20 is the max have seen too. Trying to find the leak looks like it is not on the turbo side.

Probably the Y-Pipe. And what are you reading boost with?

[nylyon]

Blake, you bring up a good point. Because the EBP is inferred so is the boost level which will be reported by the PCM and I agree to measure the actual boost you'll need a boost gauge.

[DesertSmoker]

Originally Posted by SickStroke6.0

I see that you are using an Edge Insight, which is not accurate for reading boost. My Insight CS will top out at 24 while my manual boost gauge is reading 29. You should make about 27-29 PSI on the stock tune, 30-33 tuned. Mine will hit 33-34 in OD if I roll into it.



Probably the Y-Pipe. And what are you reading boost with?

Scangauge 2... I dont know know how accurate it really is.