Over boosting
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Over boosting
I have a 03 Ford f350 6.0. it has 465,892 miles on it. After warm up I'm boosting between 36-42 psi on a stock tune. Is this going to be a problem. I've had it for a few years. I've always boosted around 30 psi. It's got the full bulletproof kit done. Never had any problems out of it except ran a little rough for a few weeks after my mom put gas in it and drove it about 10 miles. I haul a lot and when I do it's a average of 36 psi. Also I am only getting about 10-13 mpg.
Tuned
Joined: Oct 2015
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From: Roebuck, SC
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You could also check the rubber hose coming off the map sensor going to turbo, and ebp sensor and tube could be clogged up. Some people say ebp being clogged doesn't effect anything cause the computer doesn't use that for anything but idk
Postmaster
Joined: Aug 2015
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From: NW IA
You are correct in that this applies on 03 and 04 engines(I think even late 04 but could be wrong)......it depends on the sensor location IIRC
Fleet Mechanic
Joined: Nov 2016
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Our late 04 had the EBP sensor go bad and it caused numerous problems with boost. Unplugging the sensor allowed the truck to be driven but would easily cause excessive boost while driving.
New sensor and drivability returned.
New sensor and drivability returned.
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Postmaster
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From: NW IA
Kids truck will hit 30 lbs in 4th gear with the TC locked in when towing heavier.
I don't think it's uncommon for owners to see 30 stock under the right conditions.
I don't think it's uncommon for owners to see 30 stock under the right conditions.
Senior User
Joined: Jan 2015
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either sticky vanes or the command for the vanes is wrong due to VGT solenoid/connector, bad EBP, MAP.
how are you reading boost? mechanical gauge or tuner/off the dash? I have a scanner and it seems my 'turbo boost' reading hits data saturation at ~28.97 psi. It will stick there and not move under WOT. Which makes me think the MAP sensor maxxes out at around ~30 psi + barometric pressure.
if you have a scanner, monitor VGT command and see if it's cycling properly. The number you see is the COMMANDED not ACTUAL position.
how are you reading boost? mechanical gauge or tuner/off the dash? I have a scanner and it seems my 'turbo boost' reading hits data saturation at ~28.97 psi. It will stick there and not move under WOT. Which makes me think the MAP sensor maxxes out at around ~30 psi + barometric pressure.
if you have a scanner, monitor VGT command and see if it's cycling properly. The number you see is the COMMANDED not ACTUAL position.
Fleet Owner
Joined: Nov 2003
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MAP is absolute pressure so it will read boost plus atmospheric pressure.
Boost is gauge pressure (atmospheric pressure not included). I would be interested to know for sure that it is the boost that is that high (and not MAP or EBP).
Also, are you still running your tuner and/or the snow system?
Boost is gauge pressure (atmospheric pressure not included). I would be interested to know for sure that it is the boost that is that high (and not MAP or EBP).
Also, are you still running your tuner and/or the snow system?
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