Re: Lean Misfires at 2700-2800 rpm
The ignitor (power transistor, PTU) feeds ignition pulses back to the ECU. My understanding is that this is for misfire detection. This signal also feeds the tach.
You have aftermarket coils that have the reputation for jumpy or sticky tach effects. Perhaps this is affecting the MAP-ECU.
Is your MAP-ECU wired to the tach signal or the CAS signal......
We always wire the MAFT Pro's to the CAS signal......
2800-3200 is a big jump........
Bob
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