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  1. Reduced Engine Power when getting into boost

    Trying to chase down why the truck keeps going in to reduced engine power right as the truck ready to make some jam and is boost any help well be appreciated 124759124760
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    Checked wire I have no 12v reference coming from...

    Checked wire I have no 12v reference coming from pcm guessing faulty pcm has any one found away to bypass the pcm to send signal to the ckp?
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    didnt even think to do that ill check that next...

    didnt even think to do that ill check that next just replaced the crank sensor today
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    P59 Crank But No rpm or Spark

    Been fighting this problem with the pcm not having any rpm or spark the truck did run and start but then would have a problem if it stalled after warm up it would have no rpm or spark and would just...
  5. Runs But then loses rpm signal and no start after

    has any one ever had this problem i let the truck sit over night then i go to start it next day and starts and runs if i let the truck stall and go to start it again i see no rpm and it just cranks i...
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    Okay ill give that a try and let you Know on the...

    Okay ill give that a try and let you Know on the outcome Thank you
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    We dont know the size of the cam truck was bought...

    We dont know the size of the cam truck was bought with out knowing cam size so far ive calculated the ve and raised idle changed cranking ve how would i go about editing running air flow should i add...
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    Big Cam 5.3 Dies With A/C

    Hey guys ive been working on this cammed 5.3 and have promblems with it wanting to die and dieing with a/c on heres a data log and tune116001116002
  9. its savable just need to keep trying and and dont...

    its savable just need to keep trying and and dont usor e speed writter get a table flasher to flash them older p59 ecu have promblems with the factory wires had the same promblem on a buddy though we...
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    115701 heres a data log

    115701

    heres a data log
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    Its a 4.8L i also did the trick holding the rpm...

    Its a 4.8L i also did the trick holding the rpm got the o2s to turn on and was able to see them work so im guessing broken heater wire or wat could cause both heater wires to not work
  12. Thread: MazdaSpeed ?

    by Stock5.0
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    3,852

    MazdaSpeed ?

    Was Curious what ever happened with the Mazdaspeeds Was Hptuners Ever gonna crack the pcm ?
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    the truck is a return style also The truck has...

    the truck is a return style also The truck has been tunned by many diffrent shops also used to be a v6 truck so ive been looking for a stock 4.8 to restart my base tune that can explain for the...
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    P59 Wideband Add on

    Has anyone ever been able to add a Wideband AFR Gauge to work with there P59 ECM To tune With ? i remember reading something about them doing it with gto and corvettes ? Seeing if it is possible or...
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    This is my tune file115169

    This is my tune file115169
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    im force commanding closed loop when i deactivate...

    im force commanding closed loop when i deactivate force closed loop they 0 out
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    okay so like a damaged wire in both banks or can...

    okay so like a damaged wire in both banks or can one bank cause both banks not to trim also switching to IAT Sensor to not need the maf
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    P59 Ecm Not Commanding Close loop

    Has any one had a promblem with the P59 ECM not comanding closed loop and showing STFT at 0% but is showing voltage in the O2 sensors Recently havent been able to adjust my VE table due to its not...
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