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      03-26-2023, 10:07 PM   #1
meadowsdb
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Drives: '20 M8 Comp Grand Coupe
Join Date: Mar 2019
Location: Los Angeles, CA

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12308 Boost Pressure Lower than Expected

So, I have had a JB4 on my car for months now and all has been awesome. I typically drive on MAP 2 and run an e-30 fuel blend.

Today, on a drive from Phoenix to LA, I got into a "friendly celebration of speed" with a new GT500. We did probably 5-7 hard pulls over the course of 15 minutes of highway driving. During the last pull, I got a "drivetrain malfunction" light, with a "reduced power, driving still possible" warning.

Obviously, I chilled out.

The car ran fine for the next 200 miles home, albeit in lower power mode-Though I was driving quite gently. I also disabled the JB4 for safety. When I got home, I checked the codes on the JB4 and got the above feedback.

I cleared out the codes, drove her around the block, and all seemed fine.

Thoughts?

Thanks in advance!!!

UPDATE----Drove her around today, on MAP 0, for about 2 hrs. Did a few WOT pulls on the interstate. Nothing. Ran perfect and pulled great. If this keeps up for the next day or so, I will reload MAP 1 or 2, and see if the issue comes back. Seems to me that if something was PHYSICALLY damaged, broken BOV, Tubing, ETC, the problem would be consistent...

Thoughts?
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'17 M3 CP-CAI, Dinan Stg 1
'17 Camaro ZL1 (700HP)
'15 Audi S4 (500 HP)
'15 Charger Hellcat (1050 HP)

Last edited by meadowsdb; 03-27-2023 at 04:27 PM..
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