I have a 2.4 liter ecotec in my polaris slingshot. When I first bought it new discovered that the vehicle would buck like a bronco if i did a fast accel. off the line. As time went on I now have a random misfire when the engine gets up to operating temp. After I installed my supercharger it was still there but the came with new injectors, map sensor and air temp sensor and new spark plugs.
I can see the miss on the air/fuel gauge, when it is idling normal it is around 13 and steady, when the miss starts the gauge goes up to 15-16 and is very jumpy. I have scanner but it looks normal other than the spark advance starts to dance a bit. I sent the parts back to the supplier and they sent out new ones, no different. I also sent them the ECM and they confirmed it ran fine on their test vehical.
I have check all the vacume lines by using propane and visual inspections an all looks fine. So.. at this point.... help!
The engine only has 6000 miles on it and runs strong when working properly, power now actually sucks me back in the seat.