maxnix
NICO Supporter
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21170 posts
1995 Q45, 1995 Q45t, 2000 Q45
Austin TX
7-22-2002
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| Accelerator Pedal Update | 8:05 PM 7/10/2003 |
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| Quote » | Originally posted by Jason B
Infiniti calls it the ITB-02048 update. The first part of the fix replaces the accelerator pedal with one with a bit less lag in the pedal itself. Nice update. Good update. |
One of the updates I downloaded for 2002 Q45 built before July 4, 2001, (or before JNKBF01A*2M006185) showed the original throttle pedal pivoted at the bottom of the throttle link, with the upper end of the pedal damped by a spring.Obviously, one unaware of this configuration could tip in the throttle with the toe of the right foot, but just be moving the pedal by compressing this spring, and not moving the throttle rod significantly. The update eliminated the spring and pivot point so that the pedal is hard mounted on the throttle lever. Any movement of the pedal moves the throttle lever after the update. I wonder how many of the early accelerator problem reports are due to this arrangement, and the owner's not realizing that the first few inces of throttle tip-in may have only been pivoting the throttle pedal until the slack was gone before the actual throttle lever moved? Do you know if this was an issue for your 2002 Q45, Jason?
Brian
1995 Q45 & Q45t & 2000 Q45
Discover the power of the button!
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Jesda
The care train has left the station.
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31503 posts
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5-5-2003
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Interestingly, on many MB cars, the throttle is in two stages. You hit the pedal expecting to lunge forward, but it barely creeps ahead. You have to push the pedal in further (feels like its stuck) and it requires you to REALLY push each time to get going. Takes forever to get used to. Annoying as hell. -Jesda
1992 Cadillac Seville STS, 1998 Ford Mustang, 1991 Saab 900 Turbo convertible named Ducky
| Quote, originally posted by MinisterofDOOM » | | Get out of my gene pool. And take your ES350 with you. |
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PalmerWMD
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17113 posts
2004 350Z
Aberdeen Proving Ground Maryland
4-29-2002
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Great info!
Thanks Jason!Fred..:)
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2002 Maxima (pearl, traded in)
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2003 G35 Coupe (vandalized)
2004 350Z (DB ATI Supercharged 9psi , various Mods, 411 rwhp sold)
2004 350Z (PPW, graphics Kits, Vortech 8psi , LOTS of bolt ons, full Nismo suspension, BBK etc etc)
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don85259
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83 posts
computer games, fast cars, etc.
Scottsdale, Arizona, USA
5-11-2003
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I'd like to see some real world results, like dyno numbers and 0-60 times as measured by someone reputable (say Motor Trend or something). If this can be done for the current Q45, I wonder if something like this could be done with my 1998 second gen Q45? :D --don
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yidal8
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127 posts
north east
1-13-2003
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can this update be applied also to the M45 ( the software part) or is it already built in ?
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Blayne Olsen
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7 posts
NC
7-2-2003
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Will anyof this apply to my 2001 Q45t and is there an site to find all the updates that apply to my car
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maxnix
NICO Supporter
Online
21170 posts
1995 Q45, 1995 Q45t, 2000 Q45
Austin TX
7-22-2002
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2002 - present Q45 engine (US) VK45DE
1997 - 2001 Q45 engine (US) VH41DE
Modified by maxnix at 6:43 PM 1/5/2005
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Jason B
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593 posts
USA PA
8-2-2002
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| Re: Accelerator Pedal Update | 8:05 PM 7/10/2003 |
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| Quote » | Originally posted by maxnix
Do you know if this was an issue for your 2002 Q45, Jason? |
Yes, it was just about on every 2002 made. I had this done when I first got the car, and the 2nd one done for the ECU/TCM a short time ago. Infiniti now does both at the same time under one service bulletin now. It's a night and day difference! The tranny/ecu upgrade is amazing! The car feels so much quicker! It takes off instantly from a stop as well. Also, say at 30mph when you mash it, it really goes now and grabs the road behind you pulling you back into the seat. The shifting is much smoother and crisper than before and it's MUCH more fun to drive. It feels like it was given steroids. I'm a very anal person with vehicles and notice everything and this made a big change to me. The new TCM/ECU work ran about $1,200, but again, under warranty since it’s an ITB/TSB!
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PalmerWMD
Offline
17113 posts
2004 350Z
Aberdeen Proving Ground Maryland
4-29-2002
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| Quote » | Originally posted by yidal8
can this update be applied also to the M45 ( the software part) or is it already built in ? |
M45 is a 2k3 all 2k3 is IAW TSB from factory. Fred..:)
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spinmaster
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20 posts
Triathlons, High-end audio-video systems, spinning instructor
Miami, Florida
6-20-2003
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My service guy in Miami says he doesn't do it because it "voids the warranty". Is this true?
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Jason B
Offline
593 posts
USA PA
8-2-2002
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| Quote » | Originally posted by spinmaster
My service guy in Miami says he doesn't do it because it "voids the warranty". Is this true? |
No, he is just being lazy. It's a service bulletin, service bulletins don't void your warranty. With an attitude like his, I could call another dealer.
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yidal8
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127 posts
north east
1-13-2003
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So that mostly explain the better acceleration performance of the M , compared to the 02Q , since it is only 100 lbs. lighter . The 03Q also has the same diff. gear ratio . Is the 03 Q & M performance basically the same ?
The best 0-60mph I have seen for the M was 5.7 sec.
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Jason B
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593 posts
USA PA
8-2-2002
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Yes, they should be about the same.Now can can start claiming what they said in the beginning... Save and open this file.... http://www.burtmanindustries.com/q45/Infiniti.exe - Right click and save this - 700 kb
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spinmaster
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20 posts
Triathlons, High-end audio-video systems, spinning instructor
Miami, Florida
6-20-2003
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Thanks Jason. Time kick some butt
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AZhitman
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51125 posts
03 G35C s/c, 93 S13 Vert KA-T, 09 Cube, 72 240Z RB25, 63 NL320, 67 WRL411, 67.5 SPL311, 05 Frontier
Phx, AZ
4-29-2002
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Jason, have you considered a letter to the Editor of Motor Trend or C&D?This needs to be more common knowledge.
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yidal8
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127 posts
north east
1-13-2003
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What are actually the best 0-60 numbers reported in the mags for the M or Q ?
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Blayne Olsen
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7 posts
NC
7-2-2003
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I just got back from my dealer and I think he brushed me off telling me this didn't apply to my car. Can anyone on this thread tell me the truth? VIN JNKBY31A31M 101374 This is a 2001
Q45t.
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Jason B
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593 posts
USA PA
8-2-2002
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This is only for NEW model Q's. 2002+
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Q45tech
Q45 Guru
Online
13901 posts
1990 Q45 325,000 miles 19.9 years ownership
Marietta , Georgia
4-30-2002
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Even with the new diff gear the ratios in the transmission are still wrong IN SPREAD to perfectly optimize the zero to 60 and quarter mile times plus the 55-80 mph range. The shifts should occur at 63mph and 100mph...........just like the LS430 does. Unfortunately the JATCO high ratio overdrive gear runs into problems with anything other than the V6..........too many revs at highway cruise but perfect for a V6 requirement that needs to turn 300 rpm more than a V8The tranny gears were selected to match the G35car/ motor [which came out late] and to provide lux in a V8 car. Saving money by having one geared tranny to fit 2 engines and 7 cars............means somebody loses.
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yidal8
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127 posts
north east
1-13-2003
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0-60 @5.7sec. (if I'm right) is pretty impressive .
But it is a shame that they can not back-up the best V-8 in the business by a top notch drivetrain .
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PalmerWMD
Offline
17113 posts
2004 350Z
Aberdeen Proving Ground Maryland
4-29-2002
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That drivetrain is vey good.
Just not perfectly matched to produce 0-60 and 1/4 mile times for the magazines.Fred...:)
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90Q45blue
Administrator
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3433 posts
2006 Honda Accord EX-L
Lawrence, KS
7-25-2002
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Still, this update would change of lot of people's opinions, buyers and experts alike, on this car.Nick p.s. i agree w/ hitman, C&D and R&T need to know about this.
    
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yidal8
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127 posts
north east
1-13-2003
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Fred , Reliability wise at least ,the jury is still out . The new tranny is sealed , so we are not suppose to flush . We know our beloved 1gen. Q need some extra TLC regarding the tranny.
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Jason B
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593 posts
USA PA
8-2-2002
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New Q45 engine and tranny:
More pics on my website: http://get.to/q45
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maxnix
NICO Supporter
Online
21170 posts
1995 Q45, 1995 Q45t, 2000 Q45
Austin TX
7-22-2002
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| What really matters? | 8:05 PM 7/10/2003 |
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| Quote » | Originally posted by palmerwmd
That drivetrain is vey good.
Just not perfectly matched to produce 0-60 and 1/4 mile times for the magazines. - Fred... |
These times are irrelevant unless you are sanctioned drag racing or publishing.The 50 - 90 time is much more relevant for highway operation.
Modified by maxnix at 6:44 PM 1/5/2005
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G8R45
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104 posts
Jacksonville, Fl
3-14-2003
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I had the gas pedal changed a couple of months ago. The Q is going in this coming Tuesday for it's 15000 service. They are scheduled to also perform this upgrade. Seeing as how I traded a 2000 E55 for this car I am really looking forward to the improvement.
2002 Q45-premium package
2002 LX470-wifes
2002 Camaro SS
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nuQ
Offline
1532 posts
nazareth, pennsylvania
1-23-2003
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wondering that same thing......what are the benefits/drawbacks to having a sealed trans????
jeff
1990 Q45- 87 BMW 325is
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SonzofGod
Offline
40 posts
2002 Infiniti Q45
Columbia MO
3-30-2006
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (Jason B) | 11:54 AM 3/31/2006 |
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Does anyone know anymore info on this? I called the an Infiniti Dealer close to me and the service guy didnt know a whole lot and couldnt tell me whether the update ITB 02048 had been done....so I thought I might be able to tell by looking behind the pedal? I also called Infiniti directly and the person I talked to said they didnt have information regarding Technical Service Bulletins....I thinking, OK then who does? Looking forward to the upgrade if it is for real....please reply Thanks,
Nick
new 02 q45 owner
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Jason B
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593 posts
USA PA
8-2-2002
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (SonzofGod) | 2:21 PM 4/2/2006 |
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If the dealer wants to hellp you they can tell EVERYTHING that has been done to your car by looking up our Vin #. Your dealer will have all the bulletins on file and should be able to tell you the latest updates.
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SonzofGod
Offline
40 posts
2002 Infiniti Q45
Columbia MO
3-30-2006
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (Jason B) | 6:50 AM 4/4/2006 |
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OK, well I called a different Infiniti dealer this time, Bommarito, and they are checking into the update and getting back to me.I was able to check out my pedal assembly and it is the OLD style with the spring action. As for the TCM reprogram, I am assuming it has not been done since the pedal has not been changed. I was able to do a little test driving last night in my neighborhood...he he he I turned off the traction control (VDC?) button and burned out to about 40 mph. Guess the neighbors are awake now. The burnout was nice, not too loud though since Im running Goodyear Eagle RS-a which are a soft tire. The Q is almost twice the horsepower of my 97 max! Yikes! I am looking forward to hearing about this update regarding the pedal and TCM reprogram. I will post again if I find out anymore info. Thanks Jason! Nick
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Jesda
The care train has left the station.
Online
31503 posts
LETS GO VANNING
ITS A PARTY IN THE USA
5-5-2003
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Let me guess, the first dealer that didn't know what was up was Plaza Motors in Creve Coeur? They suck.Patrick Baumann at Bommarito is a good guy. [This should be moved to the Q45 section and made a sticky.]
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Louis123
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8 posts
Infiniti 2002 Q45 Sport
Austin TX
5-5-2003
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (Jason B) | 8:23 AM 12/22/2006 |
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I have a 2002 Q45 Sport that has a build date of 05/01.My initial experience with my Q's performance and acceleration was disappointing. When the car was in 5th gear and I would press the accelerator pedal to the floor, the car would hesitate for a second, as if the transmission was unsure of what to do next. My initial conclusion was the same as yours: the transmission's programming must be defective. I was unaware of the ITBs, however, so I did nothing. A second disappointment was the quality of the tires. The rear tires seemed to loose traction quite frequently, as I have what has been described as a "lead foot". After several such episodes, I noticed that the feeling of the traction control disengaging the drive wheels was similar to the feeling of the transmission hesitation I was experiencing. When the time came to replace my tires, I chose the Goodyear F1 Eagle GS-D3 W-rated tire. This is the same tire as used on the Corvette. Advantages: Outstanding wet and dry traction and handling. Disadvantages: more road feel; no more silky smoothness. Afterward, what I thought was transmission-hesitation disappeared. Flooring the car resulted in instanteous and tremendous acceleration, as the tires grabbed the road. I also drive a supercharged 2001 Jaguar XJR (0 to 60 in 5.3 sec.) and I can tell you that the Q is now nearly as fast. So, while there are certainly Q45s that need the ITB-2048 updates performed, not all of them need this update. The text of the updates have flow charts to help identify the cars that need them. By the way, be careful when testing for transmission-hesitation. The Q covers a lot of ground in a hurry when you floor it. I went from 40- to 80- MPH so fast that I nearly rammed a Lexus SC430 that had just passed me a couple of seconds earlier. I'll bet the driver was impressed with the Q's headlights coming at him like a train engine 
Modified by Louis123 at 12:29 PM 12/22/2006
Modified by Louis123 at 2:57 PM 12/22/2006
Modified by Louis123 at 4:05 PM 12/22/2006
Modified by Louis123 at 4:08 PM 12/22/2006
Modified by Louis123 at 4:10 PM 12/22/2006
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szhosain
Super Moderator
Online
14582 posts
2003 M45. Brilliant Silver.
San Jose CA
7-23-2002
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (Louis123) | 1:00 PM 12/22/2006 |
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| Quote, originally posted by Louis123 » | | When the time came to replace my tires, I chose the Goodyear F1 Eagle GS-D3 Z-rated tire. This is the same tire as used on the Corvette. Advantages: Outstanding wet and dry traction and handling. Disadvantages: more road feel; no more silky smoothness. |
A good choice of tire!  I use it in my 2003 M45. However, I use the 245/45-18 in a 100W load index and rating. Gives me a bit more load index (these cars are heavy!) and still has the high-end performance in wet conditions, that I want! Z
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Louis123
Offline
8 posts
Infiniti 2002 Q45 Sport
Austin TX
5-5-2003
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| « Re: MUST READ: How to turn a new Infiniti Q45 into an E55 (szhosain) | 2:04 PM 12/22/2006 |
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I use exactly the same as you: 100W, 245/45-18. I mistakenly typed "Z" and not "W" above. I will correct it. Thanks.
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thecrappster
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2 posts
03 Sentra SE-R Spec V, 86 300zx NA, 89 honda civic (daily driver)
clinton sc
6-17-2007
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| « Shifting points... | 12:53 AM 6/17/2007 |
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If you guys are really that concerned with optimal shifting points, wouldn't it have made more sense to buy a car with a real transmission in it? What's the point of having power under the hood that you're not in complete control of? Silly rabbit... Shifting is for real drivers!
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ozzie!
Beer Lover
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2639 posts
1988 Toyota Corolla, 1990 Toyota GT4 (4WD turbo goodness)
Australia SA
10-14-2005
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| « Re: Shifting points... (thecrappster) | 1:51 AM 6/17/2007 |
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| Quote, originally posted by thecrappster » | | If you guys are really that concerned with optimal shifting points, wouldn't it have made more sense to buy a car with a real transmission in it? What's the point of having power under the hood that you're not in complete control of? Silly rabbit... Shifting is for real drivers! |
What's the point of you posting in a section of the forums, about a car which you know nothing about?Stick to your honda fella.....
 | Quote, originally posted by numbnuts240 » | i want it because it'll be hilarious. i WILL NOT be fapping to marge simpson. probably not. ok maybe, depends on the pics  |
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Jesda
The care train has left the station.
Online
31503 posts
LETS GO VANNING
ITS A PARTY IN THE USA
5-5-2003
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| « Re: Shifting points... (thecrappster) | 5:11 AM 6/17/2007 |
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| Quote, originally posted by thecrappster » | | If you guys are really that concerned with optimal shifting points, wouldn't it have made more sense to buy a car with a real transmission in it? What's the point of having power under the hood that you're not in complete control of? Silly rabbit... Shifting is for real drivers! |
You drive a Civic. Suck my balls, tard.
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mcrews
Offline
636 posts
Q45 2002
carmicheal ca
9-11-2005
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| « Re: Shifting points... (Jesda) | 7:27 AM 6/17/2007 |
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Man, life must be slow in clinton, sc. 
Digging up a six month old thread in a Q45 site.
next thing you know he's gonna post pics of is little "daily driver" on 22's!!!!
maybe he thought "q45" stood for "Quick shift between 4th & 5th" and thought he was on some transmission web site!!!!
mcrews
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Haitian_King
Offline
2806 posts
1992 Infiniti Q45
Willingboro NJ
1-13-2007
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| « Re: Shifting points... (Jesda) | 9:32 AM 6/17/2007 |
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Holy ****. LMAO.Good one Jesda. Sounds like he touched a nerve.
"Don’t buy a poorly maintained Q… It’ll be like falling in love with a high priced hooker! The sex will be great but you’ll be broke and up all night crying." - DrewQ45"I highly appreciate the wide range of knowledge Dennis contributes to the forum but you seem to be verging on the edge of Q45Tech worship. If he said air was bad you’d probably die from asphyxiation… Get a grip man!" - DrewQ45 "Those pics make my butt leak." - AZHitman "I pulled along side of one and stared at it. Then I saw the Hyundai badge and proceeded to vomit a little in my mouth." - Yours Truly
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