Looking for my lost boost!

[Dr.Evil]

I am hoping to get some ideas as to why my set-up isn't making the proper boost. Truck is a 2001 reg cab longbed 2wd 7.3. We just installed some Stage 1 Casserly injectors, GT38R turbo, new glow plugs, ect. DP F6 tuner set to econo 60 tune. Jody says boost should be 36-38psi on this tune. After adjusting the wastegate arm as tight as I could get it, the max I am seeing is 28, but usually only 25 or so. EGTs are out of control as well due to the lack of boost that the tune is designed for. I was able to hit 30psi on one pass, and the EGTs stabilized. I have checked the intake system for leaks (holds 40psi+ no problem). I know the turbo / injectors are good as they are brand new. I don't hear / feel any exhaust leaks. I noticed the IPC sensor is leaking, could that cause any issues? I am really out of ideas. The transmission or TC is on its way out, as I can feel it lock up an inappropriate times, and the shift points are not right. Could that have anything to do with low boost somehow? Anyway just looking for some things to check, I would really like to get this dialed in this weekend. Thanks!

[Rishsd]

Up pipe leak look for black soot.

[AzPatMan]

^^ What he said.
Plus, look at the boots, IC.
There's a couple threads on how to chase and check for boost leaks. But the 'factory' up-pipe is usually the first culplrit.

[timmyboy76]

if the ICP has oil in the connection, then your trucks' defueling because of the wrong info its seeing. Replace the ICP and bet ur boost psi increases.

[Rishsd]

Originally Posted by timmyboy76

if the ICP has oil in the connection, then your trucks' defueling because of the wrong info its seeing. Replace the ICP and bet ur boost psi increases.

If it is leaking from the oring don't replace the whole thing replace just the oring.

1994 - 2003 Oil rail O-rings for the High Pressure oil rail ports in the engine valley

[Jarrod B]

Your username and avatar made me

[Dr.Evil]

Thanks for the tips guys!

I replaced the ICP and harness, didn't seem to help. It was a oily mess!!

I got up pipe doughnut gaskets to go in, hopefully that will help. I do hear a slight exhaust leak when I first fire up the truck in the morning. I don't notice it once its warm. Hopefully the up pipe doughnuts will fix this.

I pressurized the intake system as best I could with my little compressor. It held 20+ PSI with no leaks that I could hear. I couldn't get it it past that as it was going out the exhaust from the open valves in some cylinders.

I will report back once the doughnuts are installed

[Rishsd]

The best way to fix up pipes is with international bellowed up pipes. If you can't afford them replace the donuts with felpro 8194 it is a larger gasket and will help seal it. Make sure you get new bolts the old bolts are going to be rusty. If you break one and don't have new bolts you will be kicking yourself. Also PB Blaster lots of it, if they won't come out let it sit with PB on it and come back to it. They are easy to strip.

[Dr.Evil]

Originally Posted by Rishsd

The best way to fix up pipes is with international bellowed up pipes. If you can't afford them replace the donuts with felpro 8194 it is a larger gasket and will help seal it. Make sure you get new bolts the old bolts are going to be rusty. If you break one and don't have new bolts you will be kicking yourself. Also PB Blaster lots of it, if they won't come out let it sit with PB on it and come back to it. They are easy to strip.

Got a link as to where to get the international bellowed up pipes? Thanks!

[Rishsd]

I know he just got a shipment in on Friday. He was out of stock for a while. These are the cheapest I have found.


Riffraff Diesel: International Bellowed Up-pipe Kit 99.5-03