minoradjustments
+1y
Hey i need help, My dads 92 toyota Ext. cab engine is acting up... 3rd cylinder spark plug is all gunky. i put a new one in the engine idle change a lil then couple days later it's all gunky again.Doesnt look corroded just some build ups.When engine is warmed up the idle is shaky like a cylinder isnt running correctly.We just redone the head at 200,000 miles and thruck currently has 249,000 miles. What could it be? a bad Valve? compression is all fine.