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2005 Hyundai santa fe v6 running rough at idle showing

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2005 Hyundai santa fe v6...
2005 Hyundai santa fe v6 running rough at idle showing misfire 2/4/5 cylinders
changed ignition module went away. then showed up a few miles later showing misfire on 2/4 changed coils on them . still running rough at idle?
plugs changed as well wires look to be fairly recent.
Submitted: 2 years ago.Category: Hyundai
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Answered in 9 minutes by:
2/23/2016
Hyundai Mechanic: Andrew Martin,
 replied 2 years ago
Andrew Martin
Category: Hyundai
Satisfied Customers: 518
Experience: Technician at Wile Hyundai
Verified

After you replaced the cylinder 2 and 4 coils do you still have the same misfire P0302 and P0304 codes? And are those the only codes you have?

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Customer reply replied 2 years ago
no codes now just a rough idle? rpm goes up to 2000 and comes down to 400/500
Hyundai Mechanic: Andrew Martin,
 replied 2 years ago

Can you hear any thing that sounds like a vacuum leak? Idle fluctuating that much has to throw a code eventually. It could be the idle air control valve also, which is part of the throttle body. If you can't hear any vacuum leaks, check the throttle body and see if it is dirty. If it is try to clean it out with some carb cleaner and a clean rag. If everything looks good, I would wait and see if another code comes up and go from there. Aside from doing a fuel injection cleaning there really isn't anything else.

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