If you are 14°/15° stock, then +3 would put you at 17°/18°, not 19°/20°. If you really are at 19°/20°, first, provide a Consult-II slip. Secondly, be careful, as those settings are outside of Nissan's recommended specs for the engine.

 

mine stuck. to make sure i took back to the shop 2 weeks later and unplugged the battery overnight the night before. it was still at 17 and my idle was still bumped up.

 

I just had it done at DAVEB's Southpoint Nissan (thanks for hooking me up David!!!). I was already at 15° so mine was only bumped up 2° to 17°, but I can definitely tell a difference. This is a must-have mod in my opinion! The car feels peppier and accelerates more effortlessly - I was easily and very smoothly pulling ahead in traffic and on the highway, more so than before. Probably one of the top 2 or 3 best bang-for-the-buck mods - AND you're still within Nissan's specs!

 

I got to thinking about something... does anyone know what the timing is on the 350Z? DAVEB, can you get a 350Z hooked up and see what the timing is set to on it? Maybe that's part of the difference in HP (along with the intake, intake manifold, RWD, dual exhaust, and a few others as well).

Also, what about the 2004 Max? Maybe I'll run mine up to the dealer and see what it's set to. If DAVEB can hook one up, it'd save me the 15 mile (30 minute) trip to the dealer.

 

i have a 2001 auto max...is this only for manual or can be done on an auto also?

 

transmission type does not matter. they only 5th gens that have a problem seem to be early built 00.

 

so i could have this done... alll i need to do is go to the dealer and ask them to do the timing advance and put it to 17 which is +2 right?

 

thats the hard part. most dealers dont know how to do it and the ones that do normally dont want to spend their time doing it. there is no harm in asking though, but they will most likely say it will void your warranty when actually its in nissan specs. good luck.

 

One of our advisors has a 350 (or shall we say his wife does!), I'll get him to hook it up we he gets a chance. Keep in mind that this adjustment only changes the initial timing advance- The ECM still has a built-in advance curve that bumping the initial does not change.

 

The picture that DaveB sent me is available for viewing at:

http://maxima.theowensfamily.com/ima...g-adv-tape.jpg

Also, the TSBs that he faxed to me are available on my TSB page.

http://maxima.theowensfamily.com/tsb/

 

Good Grief. I called every dealer in Louisville but one. and drove to two. They wont do it. One cited that in order for him to do it, i'd have to get something saying that advancing the timing will still keep the car in federal emissions. I was like WTF. So I am gonna have to go find someplace outside of Louisville. Geez. I guess cause I am in the city. but Kentucky u dont have to have emission test... Oh well, anyone got a consult-II I can loan

 

They did warn me that I'd have to make sure and always use Premium from now on - not a prob since I've always used Chevron Supreme 93. But California guys and elsewhere that only 91 octane is available might want to make very sure you don't get any pinging after advancing it.

 

The funny thing is that 17º promotes a cleaner more fluent burn than the stock 14º .

 

Hence my question that has been asked twice in this thread and in one PM to you. What timimg does the ECU use at WOT open loop? Base or curve?

 

I doubt anyone here can honestly answer that question.

 

Thanks for the answer

Did you get the computer OBD2 Software and cable yet?
Either that or the next time that someone that is advanced gets a dyno or has the ability to store a run can take a look at the timing at say 4.5-6k rpm WOT. That should give us an idea.

The reason I ask this is what difference does bumping up the idle timing do if as soon as you step on the gas it goes out the window?
Now if it changes back at open loop that makes quite a bit of sence as to why people feel more power. If not...

 

Ok guys, did mine this morning. Was at 15, now at 17. Notice a little difference any throttle position besides WOT. Nissan guru's say at WOT the ECU goes into closed loop which would defeat this adjustment. You will notice differences cruising around, but not at WOT. Midrange torque feels better to me.

 

Finally got some free time! I think I can explain some of this- The base or initial timing is how much the timing is advanced at idle. The ECM has advances the timing as engine speed increases based on what it is programmed to do. So, if the ECM has 20 degrees in it's "curve", you add your initial to it to get your total advance. I don't know how much any given Nissan ECM has, but most automotive engines want 35-40 degrees total advance, given there is no detonation. This mod simply adds 2 degrees to whatever total advance the ECM dials in any given situation. That's why the cars are seeming peppy-er at most engine speeds. We run good gas, so it works- If lower octane fuel is used, the knock sensor will back off the advance enough to make it all pointless!

 

Sweet! Thanks for the info Dave. This makes alot more sense now as to what people are saying with their butt dyno.

 

I suppose I misunderstood you. To me it read that you were asking for the exact timing numbers throughout the curve.

 

No I was mainly looking at WOT. Or if it had set numbers in the curve and it worked solely off them. Now that I know the +2deg bump gets layed on top of the entire curve I understand the gain.

I also thought that at WOT it may have had a set base for the timing and fuel curves that was used but thats not the case.

I just don't understand the fuel curve and what data is ignored in open loop as far as emmisions. Is there somewhere on the net that I can learn more about this stuff? I'd just like to know what I'm doing before I do any kind of boost.

Thanks for the help.

 

We put a 350Z on the Consult today- the initial advance was at 15 degrees BTDC, the Consult advanced it 2 degrees, just like a Maxima- In fact the whole process was completely identical to advancing the timing on a Maxima!

 

hey guys, i went to the dealer today and everyone except one person was stupid... i asked one guy he didnt know... i told him to ask the mechanic next to him he said there is no time advance.. so i ****ed.. went down the service center and asked the guy he said we wont do it... and then i went to the garage myself and asked the guy working as the cashier he thought i needed a timing belt... and then GOD spoke to me... he said sure... let me hook it up and put it up 2... the result is pretty good... u can notice a differnce...its free so why not...

 

Does advancing the timing decrease gas mileage?

 

It should INCREASE the gas mileage.

 

From what I've read, the only drawback for advancing the timing is to use premium fuel afterward? If so, that's not an issue since most of us are doing it anyway...My concern is to what would happen to the motor in the long run? Would this make the engine less reliable or run noisier?

 

Well i have an 03 Max and the clutch is chattering so i took it in and the next day they call and said your car is fix.. So i was like cool.. I said what was the problem.. Well Sir it was your aftermarket FSB and your aftermarket exhaust was loose.. That will be $80 and you have to pay for the rental because that stuff wasn't factory... I started laughing at the service manager.. To make sure it wasn't that I made the Tech go with me and the clutch still chattered.. Plus I asked about advancing the timing because at low throttle it knocks a little and i heard advancing helps that plus i don't really get that great of gas milage. Of course he didn't know a thing about it.. I'm going to call around today to see if other Nissan place will do the timing advance...

 

if i walked in to my nissan dealer and asked them for advanced timing they would laugh at me for 10 minutes then say no,is their any way u could do this youreself

 

Talk directly to the tech. Bypass the service writer. If you bought your car from that dealer, go talk to the salesperson and have them talk to the tech.

There is only one way to DIY: Buy a $4200 Consult-II unit and do it yourself. Oh, and in order to buy the Consult-II unit, you must be a state-recognized car dealer or repair shop. I'd stick with talking directly to the tech.

 

Well tomorrow i have to take my car in for the TSB ECM fix.. What the hell is the ECM.. Is it the same as ECU?? Well i think i'm going to put my stock airbox back on so they won't give me any sh*t..

 

ECM = Electronic Control Module = The car's computer
ECU = Electronic Control Unit = The car's computer (same as ECM)

Some people just use different letters for the same thing.

Definitely put the stock airbox back on.

 

Thanks Studman... Well they reprogrammed my ECM and it took the hesitation out and helped the pinging at low RPM's.. They also said that my MAF was ok too... The sad part is the car always hesitation from day 1 but thought it was normal... I should start looking at the TSB more often.. lol.... Thanks guys!

BTW: I did put the stock airbox in.. One other thing someone might be able to answer.. At around 70 or 80 mph my hood bounces.. I told them about it and they said they would adjust the latch but it didn't fix it.. I heard there has been a problem with this and what is the cure if anyone knows.. I moved the bump stops up and it fixed it but my hood is above the fender and i don't like that..

 

Well I went to a nissan dealership in a county that deosnt require VET testing. And now the excuse they are giving me is that the ECU is under a 8 year 80,000 mile warranty and they dont want to break that. I give up on trying to advance the timing. I cant get it done anywhere. ARGH!

 

I have a 2001 SE with the same timing problems. Also brake judder. I mentioned the TSB's to the dealer and he refused to address either problem, stating that the brake rotors are normal wear and tear items and would not be covered under warranty. He also refused to hook up the Consult II unless the check engine light is on.
Is there any guys out there in the NY (Long Island) region that knows of a dealer that will actually help out?? Any suggestions would be great. Thanks

Oh I only have 20k miles and a new tranny at 10k miles. I also can't find a dealer willing to do the TCM TSB.

 

Does anyone have a contact in Maine, New Hampshire, Eastern Mass that could do the timing advance? I'm having no luck getting anyone to do it.