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Hesitation under 3K RPM's

The ECM may be pulling timing because of "high" IAT (as measured at the MAF). IIRC, it starts pulling timing around 85 degF. Get an OBD/CAN monitor and check AFRs,

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Old 09-22-2014, 10:35 PM   #23 (permalink)
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The ECM may be pulling timing because of "high" IAT (as measured at the MAF). IIRC, it starts pulling timing around 85 degF.

Get an OBD/CAN monitor and check AFRs, O2s, &c; you may need a tune.
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