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Thread: 2012 Challenger over boost shutdown P0108

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    2012 Challenger over boost shutdown P0108

    Has anyone been able to get their Challenger to boost beyond 195kpa without the car shutting down on them? We lose throttle when this happens. We cannot raise max map in Engine Diag or else the problem will get worse. I believe this has been talked about before but no solution was brought to light. Possibly a table I need to request to be defined? Watch in the log as the Pratio, map, map(SAE), and the map voltage go haywire the instant the map reading steps past the 195kpa limit which we are limited to. About 4:27 into the log.
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    Advanced Tuner coanan's Avatar
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    Quote Originally Posted by drumnbasslvr View Post
    Has anyone been able to get their Challenger to boost beyond 195kpa without the car shutting down on them? We lose throttle when this happens. We cannot raise max map in Engine Diag or else the problem will get worse. I believe this has been talked about before but no solution was brought to light. Possibly a table I need to request to be defined? Watch in the log as the Pratio, map, map(SAE), and the map voltage go haywire the instant the map reading steps past the 195kpa limit which we are limited to. About 4:27 into the log.
    Start at post 7

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    13 Chrysler 300S, Stock 17 RAM 6.4 BGE with TSP Stage 4 boosted Cam, AIT 18% OD pulley, E-force 2.62 pulley(12.2 lbs boost),, Fastman 84+4 mm throttle body, 1 7/8 kooks long tubes w/hi-flow cats, 3" Magnaflow Cat-back, FTI 2800 stall, Trans by Hellraiser, Dings Racing valve body and tune, Getrag 3.73, Walbro 400LPH, DW 65# inj. aluminum rad. SRT fans. Brembo upgrade. Stage one MOPAR springs, XIX X39 22x9 +15 - 22x10.5 +22 with NITTO NT555 265/35R22 - 295/30R22

  3. #3
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    Thank You! Yes a 3 bar map sensor is a solid answer for now. We are pegged at 195 kpa yet still but no shut downs occurred. The map sensor voltage is tamed to the range of 3.8 volts at wot now in a long pull.

  4. #4
    Advanced Tuner coanan's Avatar
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    Good to hear you're moving forward. Remember to come back and share if you can add some knowledge.
    13 Chrysler 300S, Stock 17 RAM 6.4 BGE with TSP Stage 4 boosted Cam, AIT 18% OD pulley, E-force 2.62 pulley(12.2 lbs boost),, Fastman 84+4 mm throttle body, 1 7/8 kooks long tubes w/hi-flow cats, 3" Magnaflow Cat-back, FTI 2800 stall, Trans by Hellraiser, Dings Racing valve body and tune, Getrag 3.73, Walbro 400LPH, DW 65# inj. aluminum rad. SRT fans. Brembo upgrade. Stage one MOPAR springs, XIX X39 22x9 +15 - 22x10.5 +22 with NITTO NT555 265/35R22 - 295/30R22

  5. #5
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    Quote Originally Posted by drumnbasslvr View Post
    Thank You! Yes a 3 bar map sensor is a solid answer for now. We are pegged at 195 kpa yet still but no shut downs occurred. The map sensor voltage is tamed to the range of 3.8 volts at wot now in a long pull.
    What MAP Sensor Linear value and MAP Sensor Offset value did you use with the 3 Bar MAP sensor?

  6. #6
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    you download an SRT4 tune from the repository...... and look at the Linear Value and Offset to get the values to use with the 3 Bar MAP sensor.