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Jake
Jake, Nissan Technician
Category: Nissan
Satisfied Customers: 229
Experience:  Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
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Hi we have a 07 micra 1.6 sport with an idling fault. When

Customer Question

Hi we have a 07 micra 1.6 sport with an idling fault. When the engine is started cold it revs to just over 2000rpm, then when the engine is warm it idles between 1500 and 2000rpm with a smooth and constant rise and fall of the revs. There are NO codes, plugged into OBD socket to reset idle, this did not work at this stage. I think it maybe better to list what hasn't worked:
Checked sensors manually with a scope these are the things we checked:
Throttle peddle switch
Throttle body
Temperature sensor
Air sensor
Injector duration
New manifold gasket
Smoke test for air leaks
We are uncertain of some results.
We made the decision to fit 2nd hand throttle body and throttle switch and this made no difference.
We then fitted a new temperature sensor and a genuine air sensor still with no positive results.
We are in desperate need of any help you can give us, do you know of any similar situations and what was done.
Thank you from Chris
Submitted: 4 years ago.
Category: Nissan
Expert:  indy-tech replied 4 years ago.
Hi .

Can you get me a reading of the fuel trims, long and short trim readings ,
Once at idle and at 2000 rpm.

What scan tool are you using .

Greg