1st Gen R53 Cooper S Hesitation after 16% pulley installed

Haha, yea I've seen a few threads where the debate rages on and on about the effectiveness/safety or Seafoam. I'm on the fence as the only time I've EVER used it was in my old 91 Mustang, had a 383 stroker motor in it that had a ton of engine chatter. One bottle Seafoam later it purred like a kitten. Then I ran a 200 shot of nos and blew the crap out of the engine. :cryin:

 

So like I said, today my coolant expansion tank exploded at the seam, inside my engine compartment. So I called WMW and they had an OEM tank in stock (too broke for anything else). While I was already under the hood I removed the rigged air filter/hot air intake and put the intake system back to stock.

Wouldn't you know it, so far the hesitation is GONE! I only drove it for 20 mins but drove it hard and got it nice and hot and the entire time the whole power band, at any throttle position, was perfectly smooth. So I am going to cross my fingers for that as the problem, change the fuel filter to be safe and call it a day.

It decreased the engine/sc sound drastically but it actually feels faster and "put together" now. Will wait till I can buy a proper enclosed intake system before messing with that again...

 

saved by some new plug wires!

Update...problem still existed today after going from a cone filter, to the stick Airbox, to a different cone filter. So I called Way and spoke to him and...duh....he said "change the plug wires". They are the original and are dated 2004, lol!

So I didn't have much money so no fancy 27mm, -50ohm, naked dancing girl, flame throwing, spark plug wires....but I was able to get a set of NGK 7mm Blue plug wires from Napa. They cost me $31, and let me tell you...Holy difference batman! The car is completely different, it pulls sooooooo damn hard it's retarded and all I can do is

Thanks again everyone, you can consider this matter CLOSED!!:cornut: