flattwheel

My 1992 SC400 appears to have a timing problem. It cranks and runs but on power. I have replaced the plugs and plug wires, cleaned the rotory cap, and replaced the fuel filter. Is setting the timing a big problem. I need help!!

my 1992 sc400 has no powerI creep up hills. I have checked the timing, changed plugs and wires. car cranks ok bus slow to gain rpm's. I am at an impass/