hey all! I just changed the spark plugs today for my civic which has 324,000 miles. I removed the spark plugs to check the compressions on the engine. Prior to that, I removed the TB and cleaned the IACV which stop the idling issues.

I put on the new plugs today and when I rev past 3 k, it stalled. It was idling funny to. Any ideas on how to fix the problem? I ddi check for vacuum leak and everything checked out fine.

1997 honda civic lx