TwinTurbo.NET: Nissan 300ZX forum - Idle issues
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Subject Idle issues
     
Posted by Kvert on October 30, 2014 at 10:00 PM
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Message I have a 93 Na vert and I'm having an idle problem. It idles fine at ~750-800 rpm. Minute fluctuations but otherwise stable and smooth. However, when I step on the brake, turn on headlights, or turn on heater fan the idle drops to ~600rpm and becomes rough. I've cleaned all contacts to connectors (coil packs, CAS, MAF, etc.), new plugs, new style injector upgrade with new injector connectors, new fuel filter, and the list goes on. Power balance test was no help.

I thought it was a charging problem, but the battery and alternator seem ok. Charge voltage at idle was 14.37V. I'm still thinking its an electrical issues bogging down the ignition system, but I'm not sure how to deal with it or go from here.

Any suggestions or ideas are appreciated.

     
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