Idle' problem after installing spark plugs

I removed the cover, negative wire to the battery, nuts to the spark plugs bracket, the spark plugs wires, and finally the iradium spark plugs.

I install the ngk's plat bkr6egp, and it all went wrong. My idle is below 300, and it sometimes stalls. So I tried installing the old plugs, and the same thing happens.

Anybody have any idea what I might have done wrong?

I removed the cover, negative wire to the battery, nuts to the spark plugs bracket, the spark plugs wires, and finally the iradium spark plugs.

I install the ngk's plat bkr6egp, and it all went wrong. My idle is below 300, and it sometimes stalls. So I tried installing the old plugs, and the same thing happens.

Anybody have any idea what I might have done wrong?



This is weird, I left the car as-is overnight, and now the car runs fine.