[Clown-Car]

Title pretty much says it all. Car jerks and misses once in a while at high speeds. My brother who is a good mechanic says fuel filter or catalytic converter is his best guess. I can change a fuel filter if possible. If not I'll start dumping Seafoam in the tank. Thanks for any ideas!
- Joe

 

[Browneye]

Consider a proper diagnosis. A OBDII scan can pinpoint any electrical or fuel malfunctions. Then you can decide how you want to remedy it.
I high speed miss could be a bad sparkplug, wire, coil, or fuel starvation.

"Dumping seafoam"? Uh, no.

This site has a description on the filter replacement process: How to replace the fuel filter in Chevrolet Spark? - Chevrolet Spark (M300, MK 1) (scegliauto.com)