Ok guys I am going to try to the best of my ability to describe what is going on with my RPMs. The only real words I can think of is a blip or a every 2 second tug. Its very quick every 2 - 3 seconds. I have the throttle correction plate on my IAC because when I bought the car it don't want to start until about 8 tries. Since then most all sensors have been changed. A pro shop in Loveland tuned it and put in a new chip. I thought I may have a fouled spark plug so I changed all of the the other day and still happening and getting slightly worse. I have checked timing multiple times the proper way by disconnecting the spout connector first. question I am asking myself are #1 is there something electrical pulling on it? #2 Could this be a sign of the dizzy going bad? #3 how in the hell do I figure this out. I have spent so much money at the shop getting this car running I would love to figure this out on my own. I'm in Longmont CO if anyone is close and has Ideas or would like to check it out. I'm going give it a few more days then back to the shop. thanks guys.