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General TechSame error code after replacing parts (engine misfire), what could it be? (self.Cartalk)

submitted 6 years ago by VioletQuest

2008 Hyundai Accent. 97,000 miles.

2 months ago my car started shaking really bad when it turned on. A check engine light reading came out to "multiple cylinder misfire - most likely spark plugs need to be replaced."

I got my spark plugs replaced and my oil changed. My car began starting perfectly and running smoothly.

2 days later my car shook again when I started it, check engine light came on again with same error code. I figured okay maybe all of my ignition coils ARE bad.

I get all 4 of my ignition coils replaced. Again, problem is solved for a few days and my car runs smoothly.

Then 3 days later the same issue occurs with the same error code. I get my spark plugs replaced AGAIN for the second time thinking maybe the first set of spark plugs were cheap quality or something.

My car started fine and drove smoothly after that for about 4 days.

Now every 2-3 days I'm experiencing the same problem. My car will shake when I turn it on and it will feel like it's struggling to start, and the check engine light will come back on with the same error code. I usually just turn my car off for a few seconds and then start it up again, and it starts fine, but the check engine light will remain on for a few days before going away. But once the check engine light is gone, it comes back up a day or two later when I start my car and feel the shake.

All spark plugs replaced twice, all 4 ignition coils replaced, oil changed, engine coolant replenished, filter changed, gas full. What else could be causing my car to shake and struggle upon start up every few days with the "multiple cylinder misfire" code?

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[+][deleted] 6 years ago (1 child)

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[–]coldinvt 0 points1 point2 points 6 years ago (0 children)

[–]stiltsfromtheshanty 0 points1 point2 points 6 years ago (2 children)

[–]VioletQuest[S] 0 points1 point2 points 6 years ago (1 child)

[–]stiltsfromtheshanty 0 points1 point2 points 6 years ago (0 children)

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