معلش اخى فورملا وان هتقل عليك شويه انا قريت على موقع خاص بالماكسيما ان حتى بعد ما تغير ال MAF بتحتاج برمجه كمبيوتر علشان السياره ترجع قويه تانى وباداء جيد
بس كنت عايز اعرف رايك فى الموضوع ده
Today I took the car in for the ECU reprogramming. Just to recap, the MAF was replaced on Tuesday. The car was working really well after having the MAF replaced (so I thought).
The dealer is a brand new one in town. They have glass windows where you can see what they are doing to your car.
My car went into the shop at 1:39PM. The mechanic worked on his portable little yellow computer/programmer thing, hooked it to a PC (I suppose to upload the code to his portable thing).
The mechanic connected his portable to my ECU at 1:46PM.
In the meantime, he worked on another 2000 or 2001 Maxima. He checked mine a couple of times, I guess it was not ready.
At 2:04PM he disconnected his portable, reprogramming was done.
At 2:06PM he connected a hose to my car's exhaust pipe, which would collect the exhaust gasses to some kind of drain in the floor. He started my car and ran it for a couple of minutes. I think this was the idle learn procedure.
At 2:11PM my car left the shop.
Cost: CAD$48 (about USD42)
After paying, the invoice says they did two procedures: ECM reflashing for MAF, and idle relearn, which is exactly what I saw.
Now results: The car was running great after the MAF was replaced compared to the crappy performance I had with the bad MAF (I did not actually realize it was so crappy). After I left the dealer, the car was absolutely awesome, definitely much superior performance. The car was a rocket. This is like the car I bought brand new, that is the feeling I got.
So, my conclusion, if you got your original MAF replaced for a new model and do not reprogram, you do not know what you are missing.
The dealer certainly did both the reprogramming and the idle relearn.
The guy I mentioned above (Blackbirddvq) who posted back in 2004 was absolutely correct. You do not *need* the reprogramming, but it will make a noticeable difference if you do.
As for gas consumption (or other codes showing up), we will see, I have only driven about 20 miles since the procedure.
I have gone through the whole thing, O2, coils, now MAF, I guess next is starter (which is acting up) and IACV. Although it's a great car when it runs well, I agree that it is not acceptable to have to spend so much money to fix these things. No more Nissans for me, that is for sure.
http://forums.maxima.org/5th-generation-maxima-2000-2003/594334-what-happens-if-you-replace-maf-do-not-reprogram-ecm.html