perfectmax
New member
I just bought a 1994 4runner and love the truck. It runs fairly smooth until I get over 75mph then it starts to shake a bit. I think that it is because of my tires being unbalanced. But, I am wondering if it is normal for our engines to be loud. My 4runner sounds like a baby MACK truck. Its almos like a whinning noise. Is this normal or do I need to replace spark plugs or something else?