Quote:
Originally Posted by MBD
code is PO410. When the high pitched sound come on there is one click from under drivers side dash(like a switch sound) then stutter begins and fade away after 10 or 15 seconds. It repeats this until engine is warm-between 8 and 9 on gauge; then it runs smooth. This causes the CEL to come on. When I travel which is often, I can reset the light and jump on the interstate and drive hundreds of mile without the light coming on. But once the auto has cooled and I come to a stop light it begins again.
MBD
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P0410 is a secondary air injection fault. Might be a broken vacuum hose. The air injection valves are operated by vacuum from the intake which is switched by solenoids. When the car is cold, vacuum is fed to the valves to open them up and allow the air injection to operate. When warm, the valves are left closed (except for testing by the computer). I would say that your stutter is caused by a major vacuum leak from a broken vacuum line to one or both of your secondary air injection valves. Check all the vacuum hoses and connections on your engine.
Brett