Ok guys so as of late Ive been having an issue with bogging down at very high, over 70 mph, speeds. But let me give a little back story. For about a year ive had a emission/vac code in my vehicle that never really had any issues, aside from it idling hard till the vehicle warms up, with the performance of my till the other night I was running hard on the free way. I was going 65 mph when I gunned it at as the TAC hit 5k rpms it started to bog bad and would not shift. Then a cylinder one misfire code came up. I did a turn up on this vehicle in the spring. I'm going to check the plug and wire going to cylinder one tomorrow but can anyone think of anything else?
Thanks