VGT %
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Are your readings with the engine on or off? I believe KOEO = key on engine off?
Your EBP is definitely not reading correctly. As Mark said above it should be very close to MAP & BARO and you have to be thinking about absolute vs gauge and make sure you're reading is PSI, not a metric unit.
Before you condemn the sensor check the wiring first. Those pigtails are known to fail and would also cause issues with the reading. I believe EBP defaults to 6.6psia (absolute) when the sensor is disconnected. My truck came with an cheap aftermarket pigtail that caused my EBP to fluctuate all of the place.
Whose sensor did you purchase? For critical items like these its recommended you stay with OEM parts. Avoid Amazon, eBay, etc knockoffs. Even then be careful with buying OEM from Amazon as those can be knockoff parts that look like Motorcraft. I generally purchase them from an online Ford dealer like Autonation White Bear Lake or Tasca.
Your EBP is definitely not reading correctly. As Mark said above it should be very close to MAP & BARO and you have to be thinking about absolute vs gauge and make sure you're reading is PSI, not a metric unit.
Before you condemn the sensor check the wiring first. Those pigtails are known to fail and would also cause issues with the reading. I believe EBP defaults to 6.6psia (absolute) when the sensor is disconnected. My truck came with an cheap aftermarket pigtail that caused my EBP to fluctuate all of the place.
Whose sensor did you purchase? For critical items like these its recommended you stay with OEM parts. Avoid Amazon, eBay, etc knockoffs. Even then be careful with buying OEM from Amazon as those can be knockoff parts that look like Motorcraft. I generally purchase them from an online Ford dealer like Autonation White Bear Lake or Tasca.
Mountain Pass
Joined: May 2011
Posts: 222
Likes: 11
From: Strasburg,CO
It was read koeo. I replaced the factory one over the weekend while i was doing the oil cooler and egr cooler. It didn't change. I will check the wires and the plug this weekend when I'll pull the turbo, clean and inspect the unison ring and vains. I do have to replace the egr as well since I've cleaned it 3 times and it's still not closing all the way. And I'm going to replace the turbo boot @ the turbo it's a but soft and looking worn.
Mountain Pass
Joined: May 2011
Posts: 222
Likes: 11
From: Strasburg,CO
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Mountain Pass
Joined: May 2011
Posts: 222
Likes: 11
From: Strasburg,CO
I figured out what my boost issue was. I dug into the wire harness and found about an inch in the harness the A and B wires were bear and shorting out causing the EBP to revert to 43.7. I cut out the bad sections of wire and put on a new pigtail. Now everything is working correctly.
Mountain Pass
Joined: May 2011
Posts: 222
Likes: 11
From: Strasburg,CO
It's the only way others can be helped. So many other threads I read just stop with no resolution. I'm really glad I found my issue so my resolution can help others. Good luck to all others who are having issues and those who find solutions please post the fixes you come up with.
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supperman2k
6.0L Power Stroke Diesel
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Jul 31, 2011 01:14 AM