OBG or anybody with an ideal, my truck is running like poop. One day it runs perfect and the next it doesn't want to go over 15mph. Then it runs great again. Any suggestions?
1986 Chevy C10
There are probably several possible causes... just a couple to look for...
Check the fuel filter and just change it if it has been a while reguardless... If water was in the gas, from when you purchased it or condensates into the
tank later, it can clog the filter. Add a gas additive with alcohol in it, something like Heat works great.
Possible arcing on the plug wires.... Check for electrical arc in the total darkness at night or in a dark garage while the truck is running. The arcing, if any is there, should be fairly obvious.