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Old 04-27-2013, 04:50 PM
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Low Boost Help

I posted in the general area because I thought it might be my chip taking a dump. After doing a bit of research I don't think its the chip.

my truck is an 02 7.3 has a Superchip Gold Bar (2003) 80hp/100lbs torque. I have a 5" exhaust and a sealed Volant intake system.

Truck was running just perfy and then yesterday I went to drive it and I have no power. My boost only gets up to 8-9 lbs. I have checked my plumbing and don't see any air leaks either. The truck runs fine just no power. If I floor it builds to only 8-9lbs of boost and that's it. Prior to this I could hit 28lbs. It feels stock sorta.


Any suggestions what I should look for next? Could it be the wastegate, MAP sensor...Pictures would help too!Lost here

Last edited by Scooterdog; 04-27-2013 at 04:52 PM. Reason: addional info
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Old 05-05-2013, 08:46 PM
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Quote:
Originally Posted by Scooterdog View Post
I posted in the general area because I thought it might be my chip taking a dump. After doing a bit of research I don't think its the chip.

my truck is an 02 7.3 has a Superchip Gold Bar (2003) 80hp/100lbs torque. I have a 5" exhaust and a sealed Volant intake system.

Truck was running just perfy and then yesterday I went to drive it and I have no power. My boost only gets up to 8-9 lbs. I have checked my plumbing and don't see any air leaks either. The truck runs fine just no power. If I floor it builds to only 8-9lbs of boost and that's it. Prior to this I could hit 28lbs. It feels stock sorta.


Any suggestions what I should look for next? Could it be the wastegate, MAP sensor...Pictures would help too!Lost here
I'm having the same issue. Too bad no one has made any suggestions, it would be helpful.
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Old 05-09-2013, 09:35 PM
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Well, did you check your up pipes? For it to just start happening out of the blue is strange. Double check all of your CAC boots. Tears can happen on the bottom of these boots where they are not easily seen. Make sure that the boots that hold the intake spyder to the intake pleanums on the head are tight and not torn. You are loosing boost somewhere. I know it is a no brainer, but is your air filter clean? Please let us know what you find after taking another look.
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Old 06-25-2013, 04:36 PM
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Quote:
Originally Posted by Scooterdog View Post
I posted in the general area because I thought it might be my chip taking a dump. After doing a bit of research I don't think its the chip.

my truck is an 02 7.3 has a Superchip Gold Bar (2003) 80hp/100lbs torque. I have a 5" exhaust and a sealed Volant intake system.

Truck was running just perfy and then yesterday I went to drive it and I have no power. My boost only gets up to 8-9 lbs. I have checked my plumbing and don't see any air leaks either. The truck runs fine just no power. If I floor it builds to only 8-9lbs of boost and that's it. Prior to this I could hit 28lbs. It feels stock sorta.


Any suggestions what I should look for next? Could it be the wastegate, MAP sensor...Pictures would help too!Lost here
Where are you getting your boost reading? MAP or a mechanical gauge with a tap?
You won't see any air leaks. It's air.
You need to pressure check.
Then could be exhaust leak. EBPV closing for some reason. WG actuator weak and dumping exhaust past the turbine.
Low fuel pressure, lack of high pressure oil, PCM fueling.
It can keep going.
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Old 06-25-2013, 05:10 PM
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The OP's issue?
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