Toyota Pickup Repair Question
Failed Aircare - high hydrocarbons
2. They also told me my rear brakes were seized and there is brake fluid all over the engine compartment. Could the whole brake thing be a leaking hose?
Its a 20yo engine-when was the last tune-up
HC Hydrocarbon failures mean unburned gasoline is passing through the engine and entering the exhaust. The three most common causes include ignition misfire, lean misfire and low compression (typically a burned exhaust valve). Ignition misfire can be caused by worn or fouled spark plugs, bad plug wires or a weak coil.
Lean misfire results where there is too much air and not enough fuel, so check for vacuum leaks, dirty injectors or a fuel delivery problem. In addition to these, hydrocarbon failures can also be caused by oil burning due to worn valve guides, valve guide seals and/or rings.
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