Well...sorry I haven't replied in a while. I had to replace my laptop and have just had a bunch of stuff going on. Anyhow, I applied your tune and it helped quite a bit with my idle surging. So i locked autotune out of changing settings around idle. I started to drive the car around, while autotuning and after the autotune applied. As i pushed the car a little higher in rpm, I got a miss that started around 3500-4000 rpm or so that was a lot like it was in the rev limiter. it didn't really miss if I was just revving it up in the driveway...under no load...so I kinda thought it was fuel at first, but the AFR looked okay...I thought. I checked my settings and I had the rev limiter set much higher. As I was trying to figure what is going on, I was leaning on an ignition problem, I felt my TFI module (fender mounted on a heat sink) and it was very hot (154 f), As its the original in the car, I thought it might be developing a heat problem. I ordered a new MotorCraft part, still have the miss. So I replaced the Stator (hall effect sensor) in the Distributor. Still have the miss. So i put my original stock coil back in...still have the miss. As I changed these parts the miss became less severe, not like a rev limiter, so to speak. less consistant of a miss, but still missing. I originally could not see anything in my data logs. So i have put everything back except the TFI module and the stator. At this point I'm pretty sure its either something in the MegaSquirt or my tune. One thing to note is, I have an Autometer Sport comp Tach with a shift light. The shift light starts blinking when it is missing, even though its set for a much higher rpm. I thought maybe a noise problem, I isolated the ground point from the shield on the Ignition wires from my MegaSquirt harness, still flashes when missing. I did log 2 files one in the driveway and one driving yesterday. Spark Advance advances up and stays up when I rev it up in the driveway. In the driving log, Spark Advance is dropping off....I don't recall seeing this in my older logs...when this first started. Anyhow any help with this would be greatly appreciated. I would like to get all the bugs and or problems worked out so I can actually take some class time with you to learn better (a91what). If you don't see anything in the tune or data logs I will have to get a hold of MegaSquirt, anyhow thanks in advance.