Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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When the vehicle is running, is there a Service Engine Soon light on?
Does it it idle poor also?
Are you able to do a quick test?
Open the hood, and unplug the MAF sensor. Then get in the car and start it. Let it idle, and don't give it gas. Just see if it runs smoother.
Do you know what the MAF ( Mass Air Flow ) sensor is and where it's located?
Where the air filter goes
The MAF sensor attaches to that part of the air box.
I know the light will come on, but how does it run?
or idle I should say?
So it ran better?
If you unplug it with the car running, it will stall
What I am trying to determine is if the truck idles better with it unplugged, or plugged in?
Don't give it gas, just let it idle.
That Service Engine light wasn't on till I had you unplug the MAF sensor right?
ok, Most likely the Problem is the MAF sensor. Unplugging it will cause that light to come on, but it's a effective test.
To clear the light, just disconnect the negative battery cable for 10 mins
90% of the time the MAF ( Mass Air Flow ) sensor heated element which meters the air so the computer can add the proper fuel mixture has fallen out of spec. Not enough to cause a Service Engine Soon light but enough to cause the Air and fuel Mixture to be so off it can cause Stalling, poor acceleration, won't rev over a certain Rpm, and running issues. I would have the Air and Fuel mixture readings checked to verify. Checking the voltage will not show the fault, the air and fuel mixture will. If found to be bad, do not replace with a After Market one. After market MAF sensors never seem to work properly. There heated element doesn't work right which can cause 02 sensors to flat line and have you chasing you tail trying to figure out what is wrong. So the only way to correct this issue if you do have a bad MAF sensor is to replace it with a OEM.
If you have any more questions on this, please feel free to ask. Thanks Jay!
yeah, it's easy to replace. If your Maf has totally fallen out of spec it may be dangerous to drive
I would also recommend you stick with the Nissan MAF, not the After market ones.
I am sure they do
Don't get alarmed, I am giving you the heads up
The factory MAF sensor is expensive cause of the type of material used for the heating elements.
After market don't use the same material, and that is why they are much cheaper, and that is why they never work right.
I know how you engineers are. You like to know stuff like that.
I would have the truck checked to verify though.
Because the part is expensive, You would want to verify this.
around 3 to 4 hundred
Where the after market is around 90 bucks. So think about it, 300 to 400 vs 90 bucks. There is a reason why that part is so cheap. Keep that in mind.
You got it. If you have any more questions on this, please feel free to ask. Thanks Jay!