Correct MAP readings from AE?
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Elder User
Joined: Feb 2010
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Correct MAP readings from AE?
I'm going through my list to see what might be causing my trucks issues and I was looking at the Intake Manifold Absolute Pressure on AE and at idle it is at 14 psi while exhaust back pressure psi is about 14.5. When drive the truck around, the value for the MAP runs anywhere between 1 and 4 psi below the exhaust back pressure.
Does all sound well?
Thanks,
Drake
Does all sound well?
Thanks,
Drake
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
The MAP needs to be very close to the EBP with KOEO, but EBP will always be higher than MAP with the engine running. EBP drives the boost, and MAP is boost... so MAP has to be lower because of efficiency losses.
Butt-Head
Joined: Apr 2004
Posts: 9,415
Likes: 2,910
From: Reed Point, MT
There isn't anything you can "see" about proper IPR operation with a scan tool. You can see what the PCM is commanding the regulator to do in response to what actual vs. desired injection pressure is and that's about it. Whether the pressure regulator is actually doing anything in response to that command is another story.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
The last couple of links in my signature has some good stuff. Give 'em a click.
https://www.ford-trucks.com/forums/a...9&d=1371720855
https://www.ford-trucks.com/forums/a...9&d=1371720855
Thread Starter
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Elder User
Joined: Feb 2010
Posts: 721
Likes: 1
The last couple of links in my signature has some good stuff. Give 'em a click.
https://www.ford-trucks.com/forums/a...9&d=1371720855
https://www.ford-trucks.com/forums/a...9&d=1371720855
Thanks Rich, this helps me understand the HPOP operation much better.
Drake
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