Ping/click When Ignition Cycled On. What Are The Sequence Of Events When The Key Is Turned On?

JohnnyK81

Member
Sep 17, 2007
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When I cycle the key on now, I hear a strange metallic sounding 'ping' or click, coming from around the intake manifold (the fuel pump has shut off by this point. Maybe 1 full second afterwards).

What are the sequence of events when the ignition is cycled on (but not cranked). Do injectors pulse? Does the IAC valve do something? I really can't think of anything else in the vicinity!

Thanks guys
 
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