Hi all,

I recently bought a 2003 F250 7.3L PSD. CC, 4X4 150K
K&N Air intake, 4 to 5" ehaust changes at crossmember,Boost gauge.

I am only getting around 7lbs. of boost when I get on it. Is this normal?
I have had a couple guys ride with me and them seem to think that it is a bit under powered. I pulled a 27' enclosed empty, (weight unknown) but it held it's speed fine. I am new to diesels and don't know where to start. Any suggestions are appricated. I plan on a
I just changed the oil and fuel filter(motorcraft).

TS chip in the near future.

 

That is about 10#'s less then I would expect a stock PSD to be at... Where is the boost gauge connected? I would assume you have a Pyro as well? What EGT are you at when this is occuring?

 

No EGT gauge. Yeah, I figured the boost should be between 12 to 17 stock. I have no ideal whats going on. I have about the dame power as my Dad's 96 PSD and I think I should expect a lot more.

I'm not real sure where boost gauge is connected.(Already there when I bought ) I know that no matter how long the truck has been running I never gat anymore then the 7 lbs.

 

if it is a mechanical gauge, it tie into a map sensor(by the a/c) with small plastic tubing. check the connection.... it might not be the truck just the gauge.

 

I am going to have the injectors scanned this weekend. I am also going to check gauge and turbo for leaks.

Correct me if I am wrong. To check for turbo leaks I need to:

Put fitting With a valve on before the intercooler and plug/seal right after the turbo. Pressureize to no more then 20 PSI and listen for leaks.

 

you can do that, but I would bet you have an issue with the gauge... Lots of people hook them to the Wastegate line. I dont know why someone would put a boost gauge in without a pyro... kinda backwards...

 

I think you are right. The gauge has a T that has the red line from the wastegate (red) line to it. Does that mean that it is attached to the wastegate? Will this effect my boost at the gauge?

 

The black line is from the gauge to that white T to the red line (wastegate) and then to the metal next to that sensor.

 

PM sent, go check for your answer! Pretty easy to follow pics.

 

I cant tell what they did there. Take a pic from a bit further back as well...