I just called SOmerset Nissan in Jersey about it and they told me they never heard of it. Please someone scan it in so I can shove it in their face when I go

 

Yes please. I want this done ASAP. Thanks

 

Consider it on the way, 4 pages and a cover sheet!

--------- NOTE: ---------------
I had a chat with my tech and he let me know the "ECM ID CODE" that I made reference to is used during the programming procedure to access the proper update information, I guess its like a file-name for the update. Sorry!
-------------------------------

 

Doors =

Please don't use that word again!

 

WTH are you talking about man?

 

 

Frankly how an ECu update for the throttle by wire will "increase" HP is beyond me....Can someone explain it to me....

If the deal claims it will increase HP, and it applies to those Maxs that hesitate, then shouldn't the dealer state that the update will increase your HP up to par???...

Unless the timing is change then I really can't see an increase in HP....

Any takers?...

 

Im no expert but reprogramming the ECU could change the timing since everything is computer controlled on our cars.

 

ECU updates WILL definetely increase HP...but remember, these guys are not gonna wanna do this to auto max, or a manually with no aliments...I'll check with the techs at Lynnes Nissan here in NJ to see if they can prove anything....

 

i got my new update ordered... something with a new MAF be here on monday...

 

Did you have to bring it in to the dealer before they would order it, or could you do it on the phone by just checking your VIN?

 

Don't know if this is the issue or not, but by shortening the throttle wire, you have less lag when you press the accelerator.. Also, at the same time, you will be able to open the throttle body's butterfly more (potentially) when you floor it (if it doesn't already open completely), this could add a teensy-weensy bit of HP since you will have more air coming in potentially...

again, don't know if this is what they are going to do, but this certainly helps your engine breathe.. it also gives you more feel for your engine, which is always a good thing..

 

Hey wassup, I would also want to be updated on this link. Some HP is better than no HP. thanks.

 

Im sorry to this for the umpteenth time but since the search function is disabled I will.

The VQ35 lag issue is the result of the MAF and or the MAF programming not necessarily the DBW itself. The TB servo is plenty fast and moves as fast as your foot does.
My 3" PVC MAF experiment pretty much annihilated any lag and gave me some crazy throttle response.

 

Hello all...

I just got off the phone with my dealership "Gerald of Naperville" and they don't know anything about an ECU update for 03 Maximas. Is there something I can do to make my dealership aware of the update??

Thanks.

 

i just stopped by adn mentioned it he check and all it does is replace the 2k2 MAF with a 2003 MAF ...then the update the ECU for the new MAF

 

Not only that but since he did read the whole post, or doesn't understand it, he may not know what DBW means. This whole thread, like the title says is about 2k2&2k3 Max's. They have Drive By Wire so there is no throttle cable. Thanks for trying but shortening the cable would apply to VQ30's.



SR20DEN I've been thinking about doing the same thing with my MAF, modeled around the Firm intake. How did you make the adapter for the sensor? With 3" PVC's wall thickness the ID should be very close to the ID of the TB.
If done right and bent slightly to avoid the strut tower (better clearance for the filter) it could be painted any color (even chrome) and be very cheap.
Other than that the only thing that will get more air into the VQ would be a bigger TB with a modded or new upper IM. Oh yea, or FI

 

so this is just for 2002s then?

 

Anyone got the bulletin available to post?

 

Yeah, did someone receive this fax and scan and post it somewhere? thanks

 

Yeah same here i would like an e-mail of this service bulletin.

 

[QUOTE]
SR20DEN
Im sorry to this for the umpteenth time but since the search function is disabled I will.

The VQ35 lag issue is the result of the MAF and or the MAF programming not necessarily the DBW itself. The TB servo is plenty fast and moves as fast as your foot does.
My 3" PVC MAF experiment pretty much annihilated any lag and gave me some crazy throttle response.

It's what I thought...My 2k2 auto has some pretty good throttle response when I floor it...there is a little lag say a second or so...This is normal, then the monster downshifts and kicks!!!....LOVE THAT VQ35!!!...

 

 

So basically this service bulletin is for 2002 faulty MAFS??? Nothing to do with the throttle by wire lag???

 

Ok here we go.I just talked to my service manager again.The bulletin number for auto's is NTB03-023.The bulletin's heading says "Lack of power or hesitation".He also said that it was on "chart 1" on Nissan's bulletin list,whatever that means.One more thing the compatible ECM number is 23710-6Y310.I hope this helps.I can't wait 'til monday.

 

 

No this is not a fix for a "bad MAF" or SES prob.
It fixes the lag "hesitation" as there seems to be a prob with the ECU reading the MAF. It must have a hickup at some point of the throttle curve. And the MAF replacement is either because the early ones had a real fault in the signal or because so many went bad. If you notice the ECM is the main part# number that is looked at here. I would believe that the by those numbers they would know which MAF part# was put in the car and they are correcting those as well.

Sounds like there should be a recall, as we see it, but because it's not safety related they won't do it to save money. I'm just glad they'll fix it and that we have a place like this to find out this info.

 

so if i go to the dealer and tell him about this and give him the bulletin #, they will (should) fix it for me?

 

Thanks for clearing it up for me. So can anyone send me a copy of this service bulletin. I hightly doubt my dealer ship will know what I'm talking about when i ask them. At least with a copy or copy via fax. I'll ahve something. Can anyone e-mail or via fax it to me???

 

Everyone can now download a copy of the service bulletin Here

I recommend you right click and Save Target As...to your local hard drive.
It is in PDF format so you will need Adobe Acrobat Reader to view it. Enjoy.

 

Problem.
Every time I try to download it, I get an error saying the file is damaged and could not be repaired. Any possibility of emailing it?

 

It DOES NOT work.

 

Try it now. I fixed the file. Sorry for the error.

 

The sizes are much different. Our MAF is 70mm just like the TB. MOst PVC is measured ID which means the 3" PVC has an inner diameter of 76.2mm. My A/F meter showed that anything above 4000 rpm under WOT was in a lean condition. This makes perfect sense because the probe cannot account for all of the air thats going past it. The volume is the same but the air velocity is less across the larger area. I didn't use this setup for very long because I had no way to tune it. For normal street driving it was awesome but for racing it sucked.

The mount was simple. I used standard PVC that has a 1/4" wall thickness. I drilled a hole in the PVC to a near perfect size to mount the probe and have it seal. Then I shaved a flat spot across that hole for stability and used the same screws from the oem MAF.

You can't see all of the details in the picture but this is basically it.

 

Thanks. Just DL it. I'll be making a copy of it and be bringing it to the dealership next week.

 

Does anyone know if there will be a remedy for auto's?

ARFF

EDIT:

AHHH!!! I read that page, but missed that info. SORRY. Thanks... again, but to me

 

I think there is a TSB for auto's too, see previous page for #'s...

 

Max03SE, Thank you VERY much for this info!! Thank you 2k2SEmax for scanning and posting this. I hope this fixes our goofy little hesitation problem! That's been bugging me since I bought the car.

 

As a "DBW" owner with a 6 speed - - THANK YOU

 

whoever gets this done first , please post your results, impressions.