the CEL must be out key off.
key on the CEL must be glowing ( this is ECU testing lamp, no lamp is bad news)
then when cranking as you cross 300 rpm the lamp will go out.
if after starting the lamp must stay out all the time. (running)
if it glows running, the ECU is wants to tell you the error, so go get it.
but fist.
pull the dome fuse( or neg battery lead at battery) this resets codes on these old cars.
then run again and see light rules above and my site for any codes or proc. to get codes.
MAP and ECU are not happy with reversals of polarity.
the ecu Im pretty sure has no protection for this type of fault.
more modern ecu have series diode to protect reversal. i dont see one here.
but on a 16v , i have less nfo.
the power just spreads all over the place on the ecu circuits. Kinda dumb of joe suzuki, but in early 90's that is par for course.
cheers.
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