Hi Scotty.
My daihatsu sirion 2010 (197,000km) keeps randomly misfiring. I changed the spark plugs and two of the ignition coils that were faulty. When I start the car there is no check engine light but the last two times i drove it the light came on when I was driving at 90kmph the check light came on and then turned itself off. Then the next time I drove it came on when I was driving at 40kmph (p0303, which is one of the cylinders that I changed the ignition coils + spark plugs)
Additionally the engine shakes at 1500rpm and 2500rpm.
I recently cleaned the throttle body and put in fuel additive.
What else should I check/change?
Those are not sold in the U.S. so most if not all of us here are not familiar with that model. You can find troubleshooting information in the FAQ that may apply.
