Question about 1991 Nissan 300ZX

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Wont smog got a 91 nissan 300zx and it idles high and i cant get the damn thing smogged...several people have said its either the coil packs, spark plugs or a vacuum leak...so does anyone know the answer?

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  • Roberta Smith
    Roberta Smith May 11, 2010

    not unless i heard it.... any obvious sucking sound would be a vacuum leak... does the motor seem like it's missing ... and is the check engine light on.... if so stop at an autozone and have them read the codes for you.



    Robert

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If the car idle on high rpm check if when you will step on the gas pedal over 2500 3000 rpm the car will start shaking and the will die if thats happening then check your mass air flo sensor ,or if there is no air leak that avoid the mass air flo sensor

Posted on Jan 28, 2009

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87 nissan wont pass smog


Patrice, Get a second opinion from another good shop. There has to be a way to correct the idle,adjustment,faulty sensor or stuck linkage, vacuum leak,etc. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
found this helpful answer from nissan mechanic on JustAnswer com
found this helpful answer from nissan mechanic on JustAnswer com
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