Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Did you remove the throttle body or intake when doing the work?
Possibly disconnect the battery?
You disconnected 2 injectors and then did the relearn?
next step is to check for any intake leaks. With it running spray some carb cleaner along the intake and see if the idle smooths out. Sometimes if they are searching it's due to vacuum leaks. If none are found, try unplugging the mass air flow sensor and starting the car. If the idle smooths out, it may be an issue with the maf sensor. Finally, if none of that proves to be the issue, then the throttle body likely got damaged during the cleaning and will need to be replaced. They aren't supposed to be cleaned as the varnish can get into the motors and mess em up.
What was the code?If it was P0507 that just means the idle is messed up, which you know already of course.
Yes, if it's reading wrong then there won't be a code. The computer will just adjust to whatever the maf is telling it. I am not saying it deff the maf sensor, but, if the idle stabilizes with it unplugged, then it's the likely culprit. You will see when you unplug it, the check engine light will come on and give you a maf code. This is because the computer will not see any info from it. That's when it says "OK, we have a problem" Otherwise it's not smart enough to know it's out of range and will just keep trying to make the right adjustment to the fuel.
Ok, that tells me the maf is fine, so check it for the vacuum leaks, if that doesn't work then I am afraid you might need the throttle body. Since the manual relearn didn't work, you might want to have it done with a scan tool before you replace the throttle body.
No, AUtozone only has a code reader. A scan tool needs to be used. Either the dealer or contact a couple shops to see if theirs is capable of doing the throttle relearn.
Yes, because if it won't take a relearn via the computer and scan tool, then it will be the problem. There is some room for error when you try to do it manually. This will eliminate that possibility.
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