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peterpete190, Auto Technician
Category: Nissan
Satisfied Customers: 28262
Experience:  Over 17 years diagnosing and repairing vehicles.
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Almost same issue 2001 Frontier 2.4L with 190k idle

Customer Question Almost same issue 2001 Frontier 2.4L with 190k idle sometimes steady 900 - 1000 other times idle fluctuations between 500 to 1500 rpm, no check engine light no codes.
Submitted: 1 year ago.
Category: Nissan
Expert:  peterpete190 replied 1 year ago.
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here. Inspect and see if there are any vacuum leaks on the engine like leaking vacuum hoses or connections as this will cause this fault here.If these are all checked and found to be o.k. I would have the intake smoke tested to locate any hard to see leaks like intake gaskets leaking causing this fault.I have seen a vacuum leak as one of the most common causes here and in some cases a fault code may not set with this issue.If these were already checked and found to be o.k. let me know so we can continue from here. If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.Thanks Pete