I have posted a lot about my vibrating and rough running TT. I found a couple guys with the same propblem. We have replaced MAF, ignition modules, checked timing belts, compression, motor mounts,etc.

no CEL.

I was watching my engine shake with the hood up and as soon as the cold start circuit switched it ran smoother. not normal, but much better when warm vs. cold.

Does this help anyone diagnosis our problem?

I pray for a CEL and code.

Peter S