Sometimes Runs rough when first started. Not just first start of the day, but even when warmed up and then shut down for 15 minutes it will often run rough initially like one cylinder is missing.
Roughness usually goes away after it's warmed up but lately it's started to have a bucking/missing/popping under light acceleration. Giving it more gas usually smooth's it out. It will run on up to redline and shift into the next gear and has no problem running up to
90 mph. So unlike what I think of as the typical 'worn out plug" misfire that shows up at high rpm and high load, this show up at medium rpm light to medium load.It has not turned on the check engine light
Any ideas?
Things I'm thinking it might be..
water in gas bad gas bad injector(s) bad coil