95 Rough Running
I have been having a problem for a couple weeks now with my Truck and trying to figure out what it is. It runs, no real loss of power or gas mileage. But it runs like its missing or out of time. It will shimmy and stutter when the motor is lugged down. It started on a day that was raining very hard but i had also just filled up. It has a 6 position chip,Exhaust and Air Intake. I thought it was a bad tank of gas but i have gone through 4 tanks since it started and i used a diesel additive in thos tanks. It runs the same on on either tanks, sometimes its better sometimes its worse. I have tried the IPC and its not that. I have not had any codes that have come up so i am stumped. Oil pressure is fine fuel pressure is fine. I stay up on all normal maitanance. I change fuel filters every other oil change and change oil every 3 to 5 thousand miles.I even changed fuel filters to see if that was the problem. How long will a bad batch of gas last? And i thought about the CPS but i thought if that was bad the truck would not run at all. I did take the plug to the CPs out to make sure it was not burnt or wet. Any help and ideas on were to go next would be greatly appreciated.