G37 Dissapointment

[jt3637]

Has any body experienced odd shifting patterns on G37 with auto trans? I'm new on the site here and a loyal Infiniti owner up until recently.

I had a new 2003 for 5 years and recently traded it for a G37. I was a very happy G35 owner and actually paid more for the '03 (they were new flying off the lots) than the 2008 G37.

Now with 700 miles and 6 weeks I'm very discouraged with this problem. On an open road at say 50 mph in 5th a full throttle application will have approximately .75 sec delay in actually seeing the acceleration. Throttle lag seems to be part of the problem but the G35 didnt seem to have this phenomenon.

The dealer (2 of them) say this is normal. I said what if i pulled a lane change and didnt notice the 18 wheeler rolling up behind at 80 mph and then floor boarded the throttle, I was told its normal response and that's just "the way they are".

On making a u turn starting from a stop gaining about 10 mph and at the shift point from 1st to 2nd car now completed the u turn, again call for a full throttle application if done at the shift point and the engine spools to 4.5k and the transmission is in neutral until the throttle is backed off.

It seem hard to understand this as normal as a inadvertant (careless) maneuver could put you in a very bad spot with a disastrous outcome.

As of today I have gone from a very happy Infintii owner to trying to figure out if i should get out of the car. I was so happy with the G35 and now feel the 37 doesn't perform as well in this area.

Anybody see similar issues? I would hope to see this as a problem that can be fixed. I would be interested in knowing if this is normal for all G37's or just a glitch, the dealers seem to agree this is they 'way they are' and its part of the 'added fuel economy' in the cars programing.

This problem is all in the 'full automatic and is sad that the vehicle is truly a refined and improved version of the original, however this could be a very dangerous situation.

Any comments are appreciated. Thx!

[Dattebayo]

The dealer (2 of them) say this is normal. I said what if i pulled a lane change and didnt notice the 18 wheeler rolling up behind at 80 mph and then floor boarded the throttle, I was told its normal response and that's just "the way they are".

Anybody see similar issues? I would hope to see this as a problem that can be fixed. I would be interested in knowing if this is normal for all G37's or just a glitch, the dealers seem to agree this is they 'way they are' and its part of the 'added fuel economy' in the cars programing.

LOL!

Did you ask a sales guy or one of the mechanics?Sales people don't know crap in my experience, and since what they told you about the fuel economy is crap, I think you need to start getting serious with them.

[mmm240]

Sounds like it's time for a 6spd manual!

[NSR_s30]

Sounds like it's time for a 6spd manual!

[Dattebayo]

Sounds like it's time for a 6spd manual!

...or a high stall torque converter and better shifter!

[audtatious]

Move the shifter over to DS mode before passing and you won't have any lag.

[Soravia]

LoL, read your car manual for that.

[s13gebala]

g37 is sexy as ****, i would be ad if i had that problem on a new car

[Jesda]

Is there a TSB out for reprogramming the transmission computer?

[audtatious]

Not that I've seen. The G37 needs to be in DS mode to really be aggressive and rev-match, etc.

[Slider4105]

Also, take into account the learning computer. To have it shift very aggressively you need to flog on it every once in awhile. After awhile it will get to where you floor it and it goes.

[audtatious]

Yep. Since my breakin period has been over for a bit I probably need to reset the ECU and beat the crap outta it for a bit

[gwoods]

Yep. Since my breakin period has been over for a bit I probably need to reset the ECU and beat the crap outta it for a bit

great advise

have you urned off vdc?

[darens13]

well with only 700 miles you shouldnt run the piss out of it until it is broke in. other than that, beats me why it is lagging.

[audtatious]

It's off 90% of the time I'm in the car

[Slider4105]

LOL yeah good point, you probably shouldn't be beating the hell out of it just yet. Though you gotta figure the test drivers, dealers, manufacturers have already beaten on it to make sure it works before you even got the car.

[hsckris]

well with only 700 miles you shouldnt run the piss out of it until it is broke in. other than that, beats me why it is lagging.

LOL yeah good point, you probably shouldn't be beating the hell out of it just yet.

+1.

If you really wanted ultimate shift control, should've gotten the manual anyhow.

[dickie]

Also, take into account the learning computer. To have it shift very aggressively you need to flog on it every once in awhile. After awhile it will get to where you floor it and it goes.

it is a cyberdyne systems neural net processor. a learning computer?

[9095240SXDUCK]

LOL got to love drive by wire, but I have driven many G35 and G37. I have never heard or feel the complaint before, and I am a Nissan Tech. So people that is too cheap to take it to infinti to get work done, i get to work on it! LOL

Anyway like everyone say try to gun it once in a while or just use the manual mode! And try to remember the G37 is not a sport car its a GT, if you want a sport car/ GT get the 1gen which is lean more on sport then GT! reason why Nissan change the feel of it because too many people/women complaint that its too sportly, so they change!

[audtatious]

LOL yeah good point, you probably shouldn't be beating the hell out of it just yet. Though you gotta figure the test drivers, dealers, manufacturers have already beaten on it to make sure it works before you even got the car.

Somewhat. Not sure what Infiniti does via a new engine break-in procedure but the car itself only had 8 miles on it when I got it.

[G_whizz]

Welcome to NICO...all great advice about flogging the car a bit so it learns how to adapt to your driving style. With the VDC off you should have almost insant response when you peg it.

You may also want to look at aftermarket Grounding System for improved throttle response. Maybe even a pulley set

[Sentientbydesign]

Does the engine spool up as soon as you hit the throttle or does it lag, then spool up?

I remember having this issue in an I35 that I drove years ago. I hated the lag. Seemed more like 2-3 seconds.

I haven't had the chance to check under the hood of a G37 to see what kind of grounding they have.

If you're interested, email me and I can look into it for you. The 07 G35 sedan had improved grounding over the older models. I'm thinking the G37 would have a similar platform, but there's always room for improvement.

Pulleys will only help if the engine is having trouble spooling up (IT SHOULDN'T). I'm thinking the transmission or drive by wire is to blame for this situation.

[Jacko3]

jt3637:

Your car is very normal. Some new infiniti cars tend to have the response your present. The car is designed to restrict you ability to flog it until you get past the 500 mile mark---a small safety feature during break in. So, as others have said, you will need to switch the VDC to OFF more routinely, set the transmission to DS Mode, and start flogging it in a safe place. Over time, your computer will relearn the driving sequence. This is the best advice I can give you for now. And by flogging the car, I mean take it to 6800RPM - 7000RPM for a while. My G-35 gets redlined routinely, and it is rev happy.Also, consider changing the oil to Mobil 1 Synthetic before you hit 1500 - 2000 miles---this might help as well.


Modified by Jacko3 at 3:23 PM 7/23/2008

[mrsmithGrider]

I agree you need to flog the car more to have the ECU set in an aggressive mode....In addition, I too hate the "refinement" direction that Infiniti is taking....I dont want a quiet sports car with the amount of soft curves that the new models have. These factors alone are making my decision harder and harder to go back to infiniti when my car is going to be paid off in six months. Well....maybe I lied...I will probally get a G37 sedan get a stillin exhaust and intake and ride like the road is unlimited...

[dasoupdude]

it is a cyberdyne systems neural net processor. a learning computer?

I saw that in a soundboard along time ago with Arnold, made me lolol.

[telcoman]

Has any body experienced odd shifting patterns on G37 with auto trans? I'm new on the site here and a loyal Infiniti owner up until recently.

I had a new 2003 for 5 years and recently traded it for a G37. I was a very happy G35 owner and actually paid more for the '03 (they were new flying off the lots) than the 2008 G37.

Now with 700 miles and 6 weeks I'm very discouraged with this problem. On an open road at say 50 mph in 5th a full throttle application will have approximately .75 sec delay in actually seeing the acceleration. Throttle lag seems to be part of the problem but the G35 didnt seem to have this phenomenon.

The dealer (2 of them) say this is normal. I said what if i pulled a lane change and didnt notice the 18 wheeler rolling up behind at 80 mph and then floor boarded the throttle, I was told its normal response and that's just "the way they are".

On making a u turn starting from a stop gaining about 10 mph and at the shift point from 1st to 2nd car now completed the u turn, again call for a full throttle application if done at the shift point and the engine spools to 4.5k and the transmission is in neutral until the throttle is backed off.

It seem hard to understand this as normal as a inadvertant (careless) maneuver could put you in a very bad spot with a disastrous outcome.

As of today I have gone from a very happy Infintii owner to trying to figure out if i should get out of the car. I was so happy with the G35 and now feel the 37 doesn't perform as well in this area.

Anybody see similar issues? I would hope to see this as a problem that can be fixed. I would be interested in knowing if this is normal for all G37's or just a glitch, the dealers seem to agree this is they 'way they are' and its part of the 'added fuel economy' in the cars programing.

This problem is all in the 'full automatic and is sad that the vehicle is truly a refined and improved version of the original, however this could be a very dangerous situation.

Any comments are appreciated. Thx!

jt3637

Welcome to NICO

Sorry to hear of your disappointment with the G37.Perhaps you can return it for a 6 speed manual sedan?I am very happy with my 06.There are a few disadvantages with the G37 coupe.1- Many report they don't run well on regular 87 octane 2- you cannot rotate tires.3- the automatics MPG is much worse than the sedan

there may be a few more that I left out?

After spending $$$$ on a new vehicle you should be happy

Telcoman

[audtatious]

There isn't a G37 sedan yet so you can't really compare MPG.

[etschell]

Throttle lag seems to be part of the problem but the G35 didnt seem to have this phenomenon.

that is a clear lie sir, mine has some power delay when i mash it at 50 mph.

[Sentientbydesign]

There isn't a G37 sedan yet so you can't really compare MPG.

Telco believes his G35 Sedan is the epitome of perfection. Everybody should leave mods alone, run 87 octane BP, and do discount oil changes

Right telco?

[Jacko3]

Sentient:

You are asking for a serious preaching from Telco this very hot afternoon---you know, the birds and the bees of cars. Quit while you still can.

Telco, we all love you, no matter what!