New Tiburon Forum : Hyundai Tiburon Forums - View Single Post - NGM reflash issue, suggestions needed. Long.
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post #4 of Old 07-17-2019, 05:17 PM
dmdicks
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Ive had a lot of experience in trying to make the stock ecu happy under boost. A reflashed ecu should already be happy but unless it was tuned on your car its a crap shoot. Im guessing NGM tuned the ecu to go into open loop as soon as it sees a maf voltage that correlates to a flow value equal to zero psi. I bet he did this so the ecu switches to less agressive timing maps as well as stops the ecu from trying to reach stoich afr. Throw in meth injection that is not ecu controlled and your afr control is garbage. Meth is also a band aid for a ineffective cooling system.
The J&S system is decent but designed for older ecus with sluggish knock retard. I have a feeling NGM didn't mess with optimizing timing and knock sensitivity so his solution was use the safe guard. Does the safeguard rely on its own knock sensors?

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