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93 4d lx, z6,ported, port matched, compression bumped, balanced, manual swap
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Start with removing the brass idle screw, clean it, the passage it screws into, and the throttle body good with carb cleaner and a clean rag. Reinstall the screw (after verifying the oring is good) and seat it gently, then back it out 2.5 turns, start the car and warm it until the fans come on, shut it down and jump the check connector on the passenger side above the kick panel. Restart the car and check idle and timing, adjust timing first, then idle, then recheck timing. Shut it down and remove jumper from check connector, road test. If it maintains good idle speeds but the light comes back on remove the negative battery cable for 5 minutes, let it cool completely then restart and let it idle until at normal temp.
 

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93 4d lx, z6,ported, port matched, compression bumped, balanced, manual swap
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1,549 Posts
Should be a blue 2 pin connector under the glovebox right above the carpet, a paperclip works perfect to jump the 2 pins together, or any small GA. Wire stripped back and twisted.
 

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Registered
93 4d lx, z6,ported, port matched, compression bumped, balanced, manual swap
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1,549 Posts
I'd just start with the tb gasket and the idle screw oring along with a thorough cleaning of the tb, unless you really want to scrub everything down good, maybe send injectors for cleaning, ect.
 
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