12-02-2011, 07:41 PM
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#10 (permalink)
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A True Z Fanatic
Join Date: Jul 2009
Location: Roseville, CA
Posts: 2,359
Drives: 09 370Z Tour + Sport
Rep Power: 21
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Quote:
Originally Posted by ZForce
SES light came on the bros Z the other day. Idle was at 1k, dealer hooked up black box and took it for drive with box connected. Readings said the car had backfired.....not. They called NNA tech support, they said check all grounding wires. They found the ground wire from engine to firewall, they cover was corroded. Bad connection. Cleaned and secured connection, reset ecu. runs like a champ. be related to Moisture probably.....too many car washes.....haha
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Follow up to above issue. idle air voluem learn would not take. disconnected one of mass air flow sensor and performed closed throttle learn. reattemp idle volume air learn and it took. cleared codes, found no codes returned. checked ecm grounds, as it could be related to closed throttle learn to be lost. Found light corrosion on engine ground strap from motor to firewall. Cleaned and retorqued...tested runs fine.
So wierd....
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