help with my baro or pcm?
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3rd Gear
Joined: Apr 2026
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help with my baro or pcm?
Help, 1997 7.3 zf5 barometric sensor or pcm? So the other day I was looking at my PIDs on FORScan and I noticed my barometric pressure sensor was at 8.8psi, when we live at Sea level (14.7). So I got a new one, a standard motor products off rock auto. Plugged it in, and checked FORScan it read 14.6psi, seemed good checked back on it the next day and it read 8.5psi and 4.50v. So I checked the power and ground and that got me 5.0 1V on a multimeter checked power and signal and that got me 1.28v. So I tracked the Signal wire down to the big PCM plug near the IDM. So I checked again with power and signal on a multimeter it read 0.00v, so I know I cut the right wire. And I hooked up my multimeter to wear I cut the wire at the PCM, to the power wire at baro plug it read 1.28v. I took the PCM connecter off checked it all the connections look good, no green corrosion, I can see the pin cleaned it up with a needle did not fix it. And when I turn the key on looking at FORScan with the baro unplugged, and plug it in when the key is already on it will stay at 8.8 no matter what I do. Meanwhile if I turn the key on with it plugged in it will stay at 8.5 and only move to 8.8 when I unplug it. Do I have a Fried PCM
Mountain Pass
Joined: Jan 2009
Posts: 174
Likes: 2
Here’s a little more information from another post.
https://www.ford-trucks.com/forums/1...m_content=post
https://www.ford-trucks.com/forums/1...m_content=post
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