Had lots of vehicles but never one that runs like this.
It is a 94 Chevy tracker. 4cyl 16 valve multiport injection engine. It will
not hold a constant speed without a miss fire. 30 mph or 50 mph on a flat
road it will sound like it has dropped a cylinder.
Engine starts easy, without hardly even cranking. Idles smooth as silk.
Accelerates without hesitation and pulls strong all the way to redline
without a miss.
I have changed plugs, cap, wires, and rotor because it sounds like an
ignition miss. This made no change.
I have seafoamed and ran techtron though the tank this made no difference.
Seems low load, light throttle should be when the engine is working the
least. I can't figure why this one doesn't like to run there.
FWIW I get no SES light, no smoke, no fluid usage.
Anyone ever had an engine behave like this?