The engine will run perfect for a time then is will start to skip and run rough, when this occurs the tach jumps wildly as well as the temp gauge. I have checked and re-checked every ground. All plugs, wires, fuel filter, pvc, battery are new and well maintained. I completely rebuilt the engine 3 years ago and we have put about 20,000 miles since with absolutely no problems, until a few months ago this problem started. At first the symptoms would only occur once in a great while and only happen for a few seconds but now it happens regularly (every time we drive it). I have also replaced the ECU with no success.
I think its time for 5 gallons of gas and a match!