Muffler or exhaust pipe worn out.
The Fix: Replace muffler and/or pipes as required.
Exhaust manifold cracked or broken.
The Fix: Replace exhaust manifold.
Your camshaft timing belt or chain may have slipped.
The Fix: Replace timing belt or chain.
Your ignition timing needs adjusting.
The Fix: Adjust ignition timing.
- There is a serious engine problem. You may have a burnt or broken valve, Worn or broken camshaft.
Your spark plug wires are placed on the wrong spark plugs.
The Fix: Check firing order and place the wires on the correct spark plugs.