Do I have a boost leak?
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Senior User
Joined: Nov 2010
Posts: 105
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From: IN
Do I have a boost leak?
I have a 1999 F250 7.3 w/ 6 speed manual.
I just installed brand new 160cc stage 1 injectors with PHP 6-pos.
In my 140hp tune I only see a max of 22-23 psi @ 1150-1200 degrees.
Waste-gate is unplugged and boost fooler is in place.
I black smoke pretty thick in all my tunes.
Any suggestions? As for up-pipe leaks, I don't see any black suit on the firewall.
I just installed brand new 160cc stage 1 injectors with PHP 6-pos.
In my 140hp tune I only see a max of 22-23 psi @ 1150-1200 degrees.
Waste-gate is unplugged and boost fooler is in place.
I black smoke pretty thick in all my tunes.
Any suggestions? As for up-pipe leaks, I don't see any black suit on the firewall.
Thread Starter
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Senior User
Joined: Nov 2010
Posts: 105
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From: IN
I have the Digital Isspro Gauges.
I spliced the sensor into the rubber hose before the MAP.
I spliced the sensor into the rubber hose before the MAP.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Just wanted to make sure you weren't reading from the PCM as MAP that may have been all that the gauge would read if it were the case.
Honestly boost is not that far off...
Air filter good and clean? Have you tried pressurizing the system and actually looking for leaks? Boost leak detector?
Honestly boost is not that far off...
Air filter good and clean? Have you tried pressurizing the system and actually looking for leaks? Boost leak detector?
Thread Starter
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Senior User
Joined: Nov 2010
Posts: 105
Likes: 0
From: IN
Just wanted to make sure you weren't reading from the PCM as MAP that may have been all that the gauge would read if it were the case.
Honestly boost is not that far off...
Air filter good and clean? Have you tried pressurizing the system and actually looking for leaks? Boost leak detector?
Honestly boost is not that far off...
Air filter good and clean? Have you tried pressurizing the system and actually looking for leaks? Boost leak detector?
I have not tried pressurizing the system, how would I go about doing this?
I wasn't sure the amount of pressure I should be looking to reach.
I have to push it really hard to reach that 22-23 PSI.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
PVC pipe cap with a schrader valve is the easiest IMO.
Here's a thread on the subject.
https://www.ford-trucks.com/forums/1...ctor-pics.html
Here's a thread on the subject.
https://www.ford-trucks.com/forums/1...ctor-pics.html
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Posting Guru
Joined: Jul 2007
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From: SE Wisco
You never said anything about a different turbo. Those numbers look pretty standard for a stock turbo.
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Thread Starter
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Senior User
Joined: Nov 2010
Posts: 105
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From: IN
I'll build me a boost leak tester today!
Laughing Gas
Joined: Oct 2009
Posts: 831
Likes: 2
From: Vacaville, CA
Nah... I can see 27+ with my stage 1 160cc's, dp 120 tune, and I have a wicked wheel. He should be doing better than 22.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Exhaust leak will diminish the boost. Wastegate spring can bleed boost well before 25 PSI, you might try looking into "7 turns" for the wastegate. I have a stock turbo (I think it was serviced or replaced 70K ago) and injectors with 260K. You can see my boost in the first link in my signature. Remember... I have AE and I have made absolutely certain that everything on the truck is 100% (including a T500 and fresh filter in my AIS). I had air in my fuel and I didn't trip the CEL in 60e until I fixed that.
The stock tune on my truck gets me to 22 PSI before the defueling in the program flattens it out.
The stock tune on my truck gets me to 22 PSI before the defueling in the program flattens it out.
Posting Guru
Joined: Jul 2007
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From: SE Wisco
I agree he should see 3-5 more lbs without too much trouble with addition of more fuel. I know my truck without sticks doesn't get up to the 25 psi danger zone very easily.
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