Alright..I'll get right to it and stop blabing...The check engine came on tonight, and here on the symptoms (sp?)....Funny smelling exhaust...I'm thinking rich or lean but I don't know...the smell has gotten worse and wierder as time has gone on...2nd signal of a problem HORRIBLE gas mileage...last tank I got 20 mpg, and this tank isn't much better. I normally get 26, or 27, and that's hammering the the 1st 1/8 to 1/4 of a tank. Mods are just PR CAI and ACT clutch. Oh yeah...after I rev the engine like to 5500, maybe less, on the way back down to idle it will click. I was told it might be a lifter. I don't know...I'm just a little upset. My baby is sick, and I don't know what's wrong. I've already got my front arms bent back. If I had bigger rims I'd be rubbing. I need to fix that, but I'm afraid to find out the cost. Any thoughts/hints/tips/suggestions/donations/words of wisdom for me? Someone please help me diagnose the problem.