Q: 03 Kia Rio Cylinder 1 Misfire

asked by on

03 Kia Rio 134,000 miles

I recently bought a Kia Rio and it had a check engine light. When I found out it was a Cylinder 1 misfire code I religiously looked through every forum I could find and started replacing the most common problems so it would be a reliable daily driver. The engine runs and drives. And it dosnt misfire all the time. It will show check engine light for about 5 miles then turn off and then come back on ect and then looses acceration and the code shows up. By new I mean brand new not junkyard parts. This is what I have done:

new 4 spark plugs new spark wire set new coil pack new fuel injection rail new 4 fuel injector jets reset ECU computer

Taped all cables and wires with extra electrical tape for safe keeping and cleaned all grease off most parts. These all seem to help alot but I still occasionally lose power.

Next I checked the timing belt and it seems like it could be a problem because the case has a little damage inside and the white arrows don't lineup

My car has 130000 miles.
My car has an automatic transmission.

Hi Kegan. Thanks for contacting us tonight. It certainly appears you have done a great job trying to diagnose this random misfire. The fact that there is slight damage inside the timing belt cover and that the marks are not properly aligned would be my assumption of the misfire. The correct solution, in this case, would be to replace the timing belt, the tensioner, and the water pump at the same time. You can find out what we recommend replacing for this service by clicking this link. If you’d like one of our professional mechanics to come to your location to do this for you, you can book an appointment from that page.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 03 Kia Rio Cylinder 1 Misfire

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: White goo/gunk under radiator cap

Hi, thanks for writing in. I'd be happy to provide my insight. This is often times a sign of a blown head gasket, however if this were the case your car would be overheating. I would recommend checking the oil...

Q: Loud grinding sounds when it rains or snows

It sounds to me like the antilock brakes are engaging since the wheels would change speed when you hit a puddle or when you turn and hit a puddle. Make sure all your tires match sizes and brands. This could...

Q: Q: Stalling at Idle

There can be many reasons for an engine to stall. Since the Check Engine Light is on I would start with scanning the computer for codes and moving forward with a diagnosis from there. You may have a vacuum leak...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.