Question about 1991 Nissan Maxima

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My 91 Nissan Maxima when idling in park or nuetral revs up and down.

Then when it is in gear it revs up high like I am pushing on the gas. I have changed the throttle position sensor and that did not fix the problem. Where should I check next? The car is an automatic if that helps at all.

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  • Reno CM
    Reno CM Nov 20, 2013

    No IAC on this car, or nobody actually sells it. Somebody suggested that before and I have been searching for that and they don't even sell it at the dealer.

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  • Nissan Master
  • 5,720 Answers

IAC sensor could be bad.

Posted on Nov 20, 2013

Testimonial: "I have looked for the IAC even with the dealer parts and can not find it anywhere. I don't think my car has it or something."

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SOURCE: High idle speed- Nissan N16 Pulsar/ Almera

Battery not charging well when airconditioner on ( also engine speed not increase when air conditioner on )

Posted on Jul 30, 2009

  • 290 Answers

SOURCE: 1995 Nissan Maxima idle problems

Let's try the cheapest fix first. Change the fuel filter out. You'll probably see a brown looking goop in the gas, This is an "ETHANOL" problem. Read up on it. These are all related to so many idle and acceleration problems. Buy a can of SEAFOAM at the parts house. Fill up tank with Premium and add SEAFOAM. Then change filter out before 500 more miles. This should clean out the water and the goop and the carbon build up caused by the ETHANOL. Add a can of SEAFOAM every 3000 mile after that to a full tank of gas. It will keep your emissions,engine, and fuel lines clean. And will keep your car from line freeze up. Good luck.

Posted on Aug 29, 2009

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