Summary-
-On acceleration, the car bogs down horribly (loss of power, vibration, exhaust sounds changes).
-Only happens on full tip-in of throttle - can drive semi normally if only using about 10% throttle.
-When it happens the CEL flashes but then goes back to solid.


Related notes based on searching forum-
-No coolant light, no coolant leakage issues that I know of.
-Cat was replaced with high-flow about a year ago.
-New plugs, wires, and coils in the last 1.5 years.
-ExoticSpeed R1T exhaust, AEM intake with New filter in last year.
-Car has 80k miles, manual trans.

Any help would be really great before Chicago winter comes full force!!

 

Get your codes scanned.
Blinking CEL is always misfires.
Misfires kill cats.
Solid CEL is likely a Cat Below Threshold code.