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Motastic Motastic is offline
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Car: 2011 335 N55 single turbo
Default N55 335 E chassis weird overboost issue - 09-21-2021, 10:32 AM

Hi guys, me and my tuner have been trying to figure this out for months now on why my single turbo N55 E chassis canít run on my external wastegate using the Mac solenoid. The car has port injection, stage 3 pump, full e85, Phoenix racing manifold, precision race works coils 2 step NGK at .020, and a big boost 3.4 kit with a wastegate spring at 13psi. The car runs perfectly fine on wastegate spring with no issues or codes. But as soon as I hook up the Mac and set it to map 6 to run 20psi the car would overboost and go in to limp mode. I will upload a picture of the codes. I will also upload a log. I hooked up the Mac as demonstrated by the instructions and tested for boost leaks. I have the correct firmware for the Mac. I would set the FF wastegate adaptation to 20 and it would go to the moon.

I have also seen now that it would misfire after overboosting.
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File Type: csv P40_M6_R1_210921_083210.csv (10.3 KB, 13 views)
File Type: csv P40_M6_R1_210921_085038.csv (11.1 KB, 16 views)
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Motastic Motastic is offline
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Default 09-21-2021, 10:35 AM

Picture of codes
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Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Default 09-21-2021, 07:13 PM

Got a log on just spring pressure?



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Motastic Motastic is offline
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Default 09-21-2021, 07:26 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Got a log on just spring pressure?
My harness just took a sh**t on me multiple short circuit codes related to the harness plugs.
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File Type: csv No boost.csv (9.8 KB, 16 views)
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