10 PSI Maximum! Help!

[broncrider]

Originally Posted by nic0084

10 psi stock going 60mph/2200rpm seems pretty high for just cruising... and that would mean horrible highway mpg.

sorry i miss worded that. i meant that ill be around 3-4 cruising and then as i hit a little hill and roll into it ill reach 10psi. so what im meaning to say to not get it all mixed up is that if i floor it at 60 itll climb to 10psi

[flyin hawaiian]

it sounds like you have a kinked boost tube or leaking. mine dont work cause i kinked it and had to fix it, with the soft tube. but if your truck is running fine and no leaks ? that must be it.so no worries,run it.

[Jon]

Originally Posted by flyin hawaiian

it sounds like you have a kinked boost tube or leaking. mine dont work cause i kinked it and had to fix it, with the soft tube. but if your truck is running fine and no leaks ? that must be it.so no worries,run it.

No worries like run it like it is or try to fix it?

[Pro-Fab]

Well if I am WOT in 5th gear it will only boost to 10 PSI pulling a boat. And if I hit a hill it will slow down and wont accelerate until I drop a gear or 2. The Turbo is completely fine with no shaft play and compressor housing is in great shape. Fuel pressure is great, and injectors pass buzz test with flying colors. I have an open filter intake and down pipe. Would a low Exhaust back pressure sensor signal cause this?

[flyin hawaiian]

so it losing power up hill and loaded down.so just when the motor is hot?have you changed the O-rings on the IPR yet?and how much miles do you have on the injectors?and hows your hpop?

[Pro-Fab]

Hpop is good and IPR is new with New Orings. Injectors have ~5000 miles.

[flyin hawaiian]

well its hard to say.maybe try to put scan tool on and drive up a long hill and see what she will do?

[Stinkers]

I have a 1997 Powerstroke that had a very similar problem. I could only make 11 psi boost with my chip cranked all the way up. Other than the low boost problem the truck ran great. Most people told me it was either an exhaust leak or a boost leak but I couldn't find any indication of either. It turned out to be a jammed up catalytic converter. The backpressure was so high that the exhaust gas velocity was not high enough to properly drive the turbo. I assume that yours has a cat on it too because it is a 1997. My truck now makes 23 psi boost. So long story short, if you haven't looked at the cat you might want to check it out. With your Auto Enginuity tool you can monitor backpressure. Stock exhaust should be around 15 psi at idle and no more than about 42 psi at WOT. Hope this helps!

[97powerstroker]

well in 5th gear wot,my boost is around 10 also,im pretty sure thats normal,when i shift to 4th and crank it on stock setting,it will hit 15 psi,to hit that in 5th you would have to be going really fast i think.so try pulling the hills in 4th,i think you will then see around 15psi which is stock boost.also what are your egts like on these hills in 5th,and what does this boat weigh?