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Discussion Starter #1 (Edited)
Here is some context about the engine. So I bought this engine a few months ago, which was a JDM Ej205 imported to a warehouse in the east coast. I just installed it, everything has the U.S parts, cam sensor, knock sensor, connectors, all the bolt ons ect. including the U.S ECU. Just the AVCS is not wired, and I do not plan on wiring it.

ISSUE:
This engine does not want to idle, I need to give it a little gas then it starts to idle a little better. However, when I don't gas it it goes to 500-600 RMP then occasionally make a very loud popping noise when idling low. Then when I gas it, the engine sounds like it's misfiring, but the CEL is not on... The popping noise is near the passenger side of the engine. It sounds very concerning. Distance calculator, mileage, fuel cost calculator UK
 
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