MAF replacement = ECM reprogram? Yes REPROGRAM
05-26-2004, 04:17 AM
#1
Old Fuddy Duddy
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Join Date: Feb 2001
Posts: 2,712
MAF replacement = ECM reprogram? Yes REPROGRAM
OK,
My car is in for service (P0140) and several TSB have floated around for it. I was reading the step by step instructions when I came across a stipulation about ECM programs to put on the ECU.
It is para-phrased as:
Full TSB located here, referenced section page 1 bottom 1/3 of page
Soooo, this brings up the question: Is there "different" code being used or are they having to drop the code onto the ECU in a different manner?
Thoughts? Opinions?
My car is in for service (P0140) and several TSB have floated around for it. I was reading the step by step instructions when I came across a stipulation about ECM programs to put on the ECU.
It is para-phrased as:
Standard reprogramming procedure (if vehicle has a standard airflow meter, P/N 22680-AD200 or 22680-6N201- see Chart A-1 orn page 3), or
Special reprogramming procedure using ECM ID code (if vehicle has an updated airflow meter, P/N 22680-2Y001 or 22680-AM600- See Chart A-2 on page 3).
Special reprogramming procedure using ECM ID code (if vehicle has an updated airflow meter, P/N 22680-2Y001 or 22680-AM600- See Chart A-2 on page 3).
Soooo, this brings up the question: Is there "different" code being used or are they having to drop the code onto the ECU in a different manner?
Thoughts? Opinions?
05-26-2004, 05:19 AM
#3
Old Fuddy Duddy
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Join Date: Feb 2001
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Originally Posted by nailz420
Can you re-phrase that?
One is a process change, the other is a code change.
05-26-2004, 08:51 AM
#7
Old Fuddy Duddy
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Join Date: Feb 2001
Posts: 2,712
Originally Posted by IceY2K1
Probably a different "patch" depending on what MAF you currently have, ie old or new.
I wouldn't worry about it.
I wouldn't worry about it.
But if these guys are good, I just might pay them to have my timing advanced.
05-26-2004, 09:15 AM
#9
Old Fuddy Duddy
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Originally Posted by nailz420
Why wont you be able to?
RIght now I would settle for a complete repair (ECU reprogram and 2 new o2's) with out a seconds hesitation (under warranty of course).
But Mr. Murphy has a way of making me his...well...you know...
05-26-2004, 04:54 PM
#11
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Originally Posted by nailz420
You can install it and drive with the un-updated ECU(apparently thats what is happening to me...). I heard that it makes MAF fail soon, which makes me think of at least one reason why they didnt update it.
What are you saying. If you install the new (updated) MAF and don't update the ECU the new MAF will fail??
05-27-2004, 05:19 AM
#13
Old Fuddy Duddy
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Originally Posted by sascuderi
What are you saying. If you install the new (updated) MAF and don't update the ECU the new MAF will fail??
As for proof that the new works with the old, phone Dave Burnett.
I am updating the ECU because I want the latest and greatest ECU code so I dont throw another o2 check light due to Nissans inability to test properly for long term effects.
05-27-2004, 06:19 PM
#14
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Location: South Jersey
Posts: 1,329
Originally Posted by Colonel
This is INCORRECT. The new MAF's will work under the old code. BUT, it "MIGHT" not be taking full effect. Its really a mystery as nobody I know of has access to the fuel maps and such to reference either program.
As for proof that the new works with the old, phone Dave Burnett.
I am updating the ECU because I want the latest and greatest ECU code so I dont throw another o2 check light due to Nissans inability to test properly for long term effects.
As for proof that the new works with the old, phone Dave Burnett.
I am updating the ECU because I want the latest and greatest ECU code so I dont throw another o2 check light due to Nissans inability to test properly for long term effects.
I know the new MAF will work without flashing the ECU since I am running the new MAF in my 2000 I30 now and did not have the ECU updated. (Installed the new MAF myself)
I would really like to know what is changed in the ECU program when they flash it when the new MAF is installed at the dealership. Does anyone on this board work for Nissan and can give us a hint???????
05-27-2004, 07:01 PM
#15
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Join Date: Nov 2001
Posts: 963
Originally Posted by sascuderi
I know the new MAF will work without flashing the ECU since I am running the new MAF in my 2000 I30 now and did not have the ECU updated. (Installed the new MAF myself)
I would really like to know what is changed in the ECU program when they flash it when the new MAF is installed at the dealership. Does anyone on this board work for Nissan and can give us a hint???????
I would really like to know what is changed in the ECU program when they flash it when the new MAF is installed at the dealership. Does anyone on this board work for Nissan and can give us a hint???????
I don't work for Nissan, but I can tell you I felt a definite difference from the original code on my '02 to the code I have now which was flashed to the ECM with the new MAF. To be honest, I think I've lost power since the new flash. It feels like the timing advance is not as aggressive as when the car was new. Also, the way the throttle comes on is different. Just a little movement of the pedal gives a lot of response at the engine and flooring it is not as much. In other words, the throttle used to be more linear but now it gives a big "bump" at the start and flattens out after . . . I'd be interested in driving a 6spd with the new MAF and the old code . . . it could be better.
05-28-2004, 03:11 PM
#16
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Originally Posted by ABS
\
I don't work for Nissan, but I can tell you I felt a definite difference from the original code on my '02 to the code I have now which was flashed to the ECM with the new MAF. To be honest, I think I've lost power since the new flash. It feels like the timing advance is not as aggressive as when the car was new. Also, the way the throttle comes on is different. Just a little movement of the pedal gives a lot of response at the engine and flooring it is not as much. In other words, the throttle used to be more linear but now it gives a big "bump" at the start and flattens out after . . . I'd be interested in driving a 6spd with the new MAF and the old code . . . it could be better.
I don't work for Nissan, but I can tell you I felt a definite difference from the original code on my '02 to the code I have now which was flashed to the ECM with the new MAF. To be honest, I think I've lost power since the new flash. It feels like the timing advance is not as aggressive as when the car was new. Also, the way the throttle comes on is different. Just a little movement of the pedal gives a lot of response at the engine and flooring it is not as much. In other words, the throttle used to be more linear but now it gives a big "bump" at the start and flattens out after . . . I'd be interested in driving a 6spd with the new MAF and the old code . . . it could be better.
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