"2002 KIA Rio Shudders and Losing Some Powers"

2002 KIA Rio Engine

Okay this is what I’ve got, my 2002 KIA Rio shudders when moving away at junctions and also seems to lose power sometimes. The check engine light is on. Mechanic told me it could be throttle pedal position switch but I phoned KIA supplier and this model doesn’t have one. Nowhere open til Tuesday, what could it be?

Answer: Your mechanic should have read the fault/trouble code (“DTC”) from the car. It would have told you what part is failing. Can you take it to a part store like AutoZone (preferably one that doesn’t charge to read the code)? Shuddering when accelerating from a stop is most likely due to engine misfire – bad distributor, ignition coil, spark plug, or fuel injector. It sounds like the car is otherwise drive-able, so I doubt it’s related to the throttle… it would ALWAYS be close to undrive-able.

Again, it’s best to have the code read to be sure. If it is misfire, it may even tell you which cylinder(s) is bad.