Hi all,

I changed my spark plugs on my 2011 TSX SportWagon with NGK iridiums. I replaced them with the OEM ones listed on the manual.

I have noticed that when it cold starts, it high idles at 1500rpm and does not drop till I shift into drive or reverse.

1) I inspected the hoses and it looks like nothing is off/ripped

2) Reset the ecu by disconnecting the battery or 10-15 minutes.

What do?

 

Look up idle relearn, its normal id you disconnect the battery and after driving around normally, you should be okay again

 

Does it still idle that high after there is heat in the engine? Mine idles around 1,500 for a minute or so after a cold start.