can anyone spot a/several problem/s with the 4 on the left?

I changed my oil, change the spark plugs and leads, changed filters, tightened several heat shields around the exhaust, hit things with hammers, cleaned corrosion from battery and its tray, degreased the engine bay. Basically played Edd China and gave it a Wheeler Dealery light service.

Its a glorious thing to behold. Looks pretty, runs like a... well not a train, but whatever the 1.8L equivalent of a train is. POWAAA.... ok lowercase, powaa

https://www.facebook.com/photo.php?v=10…