i got a 2005 G35 with injen cold air and OBX exhaust put on.... the my check engine is on and some one told me to clean the (MAS i think that the avb.) mass air flow sensor and put it back in... but everytime i clean it... it goes off and stays off for like 30 mins and then come back on... is it the sensor or is something else.. how would i know if i need a new one time i for got to plug it in and it wouldnt run worth a crap but plug it back in worked fine just askin about the engine light comin on and stayin on,... just askin for some advice if anyone can help me with that issue

 

Maybe try an ECU reset, AF may be off and it's wiggin out for that.

 

this is my first G35 the car runs fine ..no problem with it has power like normal.. but how do i reset the ECU...and what is the AF mean?

 

AF is air fuel ratio. THe ecu's generally need a reset any time you mess with one or the other so it can adapt to the new conditions you've provided.
motodyne instalation
There is a download installation pdf link there, I belive the second to last page has the directions to do the reset. Be patient, I was about to give up when it actually worked.
Good luck!

 

It will drive a little funny for a day or so, but then it will adapt to your driving style, not a horrible thing anyways...
If you still get a check engine I would recomend going to Infiniti for diagnostics. They will code the check engine and tell you what sensor is acting up and what should be done to resolve it.

 

Oh, and if you check engine light is on your running in "safe mode" so your not getting he normal performance at all, it will back off timing and run rich which is horrible for power!

 

ive tried to undo the battery for like 5-10 min after i clean the MAS and it stays off for like 30 mins and the light will come back on is it different from the batt. and doing it with the pedal? or does it do the same thing?

 

You have to disconnect your battery for quite a while. If you search ecu reset you might find a literal timeframe, but you'd wanna leave it off at least over night. The capacitors(SP?) retain charge for quite a while. I'd recomend going thru the pedal reset, thats what the tech's do to reset. It's guaranteed to reset the ECU where as a battery disconnect you just assume it did.
Odds are you prob need a new MAF, but it's worth a shot to reset. And it may not be your MAF, you dont know what sensor is triggering the check engine unless you code it....
Good luck!

 

I've dun the ECU reset like y'all have said to and the light will go off for a while and then eventually come back on in like 2 hrs would that mean something it's my MAS?

 

what is the actual code it is throwing?? easy way to figure out if the MAF is messed up is have the car running and unplug it. if the car changes the way it idles or runs within about 10 mins then the maf is good. im wondering if you would be throwing a p1283. i had this problem before and id disconnect the battery and about a half hour later popped back on.

 

Hey Daily,

How did you deal with the P1283 code? I'm having this code right now as well, had it before my UPREV tune and replaced all the O2 sensors by the headers. Got the tune, and about 200 miles later, got this p1283 again.

Thanks for your help!

 

hmmm i would def want to see what ur a/f ratio is holding constant at. when i had this code i actually bought the sensor to take with me in case they needed it but he was able to get my a/f to hold steady around 13.~ and the check engine light has not turned back on since the tune, ABOUT 800 miles ago and i did NOT replace the sensor either