Engine, Drivetrain & Forced-Induction Have Technical Questions or Done Modifications to the G35? Find out the answer in here! (View All Posts)

Major accel hesitation G35 5AT?

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #31  
Old 04-30-2007, 04:35 PM
dcityjatt's Avatar
Registered User
iTrader: (5)
Join Date: Oct 2006
Location: San Francisco, CA
Posts: 2,520
Likes: 0
Received 15 Likes on 14 Posts
probably not the case but you wont happen to have a true dual after mkt exhaust do ya?

if u do-u are bound to lose some power down low when u give it some gas to accelerate
 
  #32  
Old 04-30-2007, 11:18 PM
virtualbong's Avatar
Registered User
iTrader: (3)
Join Date: Jan 2005
Location: Boston, MA
Posts: 1,059
Likes: 0
Received 0 Likes on 0 Posts
When I purchased the car, it came with a CAI and an Invidia Catback. Would that cause the acceleration delay?
 
  #33  
Old 05-01-2007, 01:35 AM
Triji's Avatar
Registered User
iTrader: (12)
Join Date: Nov 2003
Location: The Valley, AZ
Posts: 3,126
Received 10 Likes on 7 Posts
Originally Posted by Azhreal
I haven't had time to reset my ECU since it takes 12 straight hours (good freakin luck with that since I just got it )

Here is a hint.... Do the ECU reset while you are sleeping!!
 
  #34  
Old 05-01-2007, 01:41 AM
Dustin@StrafeAutomotive's Avatar
Really Needs a Life
iTrader: (164)
Join Date: Jan 2007
Location: Rowland Heights, CA
Posts: 12,680
Received 177 Likes on 136 Posts
couldnt have been better said..

Originally Posted by Adon
you guys are overthinking this whole issue... the issue is that he's probably in 5th gear under 2000rpm when he floors it.... so when he does hit the gas, the transmission just takes a second or two to shift down to a lower gear and engage.... same thing with my 03... it's annoying as fukkkkkk.... but grounding wires, or some better transmission components would do the trick and make it more responsive.... and besides no offense to the guy but he seems like a rookie, I mean who describes Tiptronic/Sequential as "pseudo-manual" ??
and he also states that when he floors it the RPM's go to 4500 and then he finally sees some acceleration... so with that statement it's as if he has no understanding the reason the revs go to to around 4000 is because the transmission downshifts to a lower gear, which obviously ends up being somewhere higher in the RPM range..... dude the higher in the RPM's that you are THE MORE POWER YOU HAVE AVAILABLE AT YOUR DISPOSAL!
 
  #35  
Old 05-01-2007, 04:11 PM
AdamJ's Avatar
Registered User
Join Date: Apr 2007
Location: Orange County, CA
Posts: 181
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by dijstiiv
couldnt have been better said..
Actually it could have.
 
  #36  
Old 05-01-2007, 10:51 PM
Azhreal's Avatar
Registered User
Thread Starter
Join Date: Apr 2007
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Alright I was gonna blow the issue off but today in wet road conditions I hit the gas maybe 25% if that to accelerate from 20 to 40 and my RPM's hit 6k and almost red-lined and then my Slip light came on. This definitely scared the crap out of me since I almost redlined the thing when I hit the accel at MOST half way. I know it was wet, but I've never seen a 2 second delay on a pedal to accelerate instance on any car. The car never lost traction or slipped, it was close but the RPM's were already 6k before the slip came on.

The car works completely flawless in manual when left in 3rd gear I get instant acceleration... it's just when it's trying to decide to shift I guess. I'll do an ECU asap but man that just wasn't right earlier.
 
  #37  
Old 05-03-2007, 12:38 AM
j-champaco's Avatar
Registered User
Join Date: Apr 2007
Location: chula vista (SD)
Posts: 237
Likes: 0
Received 0 Likes on 0 Posts
youre an automatic - there will be a slight delay. if you stay in 3rd - at mid-high rpms...or in anygear ( in mani mode) you'll notice more " crisp" rpm control...
 
  #38  
Old 05-03-2007, 12:49 PM
dTor's Avatar
Registered User
iTrader: (30)
Join Date: Jun 2006
Location: Atlanta, GA
Posts: 1,359
Likes: 0
Received 2 Likes on 2 Posts
Listen,

When you peg the gas from a dig (rolling), you car will downshift. It takes a moment for the downshift to occur. At the same time, your torque converter unlocks and allows the engine to spin up (similar to depressing the clutch on a manual tranny), then gradually (so-to-speak) reengages as your tranny gets into the lower gear. All this DOES take a bit of time, and yes it is sluggish. I did notice a slight difference when I installed my grounding wires (believe me, I could not have convinced myself that grounding wires actually worked before I installed them). If your main concern is shifting quick, the stay in manumatic mode.

A better example of the torque converter disengaging is if you give your gas a partial stab while rolling. Don't hit it enough to cause a downshift. You'll notice that your RPMs will jump 1k-2k, even though you're still in the same gear.

As far as what happened to you on the wet road, your car was working perfectly. The slip light came on telling you that your traction control system is preventing your rear wheels from breaking traction. Your throttle was electronically b!tch-slapped and, even with the pedal to the floor, you won't accellerate until your rear wheels regain traction.



Originally Posted by virtualbong
I have the same question, but I drive a 6 speed. What has happening is that if I accelerate hard in 1st gear it will take literally a second or two for it to actually go, then when I shift up to second it will take a second or two to go too. It just revs extremely high before it car actually gets going. Is this an ecu issue? I am not an experienced manual driver, but this really does not make sense to me. If you have any input, please let me know, thanks!
You need a clutch.
 
  #39  
Old 05-03-2007, 01:15 PM
Gam3's Avatar
Registered User
iTrader: (1)
Join Date: Aug 2006
Location: Vancouver, BC
Posts: 1,209
Likes: 0
Received 0 Likes on 0 Posts
all 5At's have that bit of lag when u slam on the accelerator..its not instant like in manual mode
 
  #40  
Old 05-03-2007, 03:14 PM
j-champaco's Avatar
Registered User
Join Date: Apr 2007
Location: chula vista (SD)
Posts: 237
Likes: 0
Received 0 Likes on 0 Posts
shoot - all automatics have that lag - thankfully, there's MANI-MODE!
 
  #41  
Old 05-11-2007, 05:03 PM
Azhreal's Avatar
Registered User
Thread Starter
Join Date: Apr 2007
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Ok... I'm not flooring the gas like you guys may be thinking. Even if I hit the accel lately half way just to get some decent accel I think it is downshifting into 3rd from 5th if I'm going 50mph. My main concern here is not from 0-40, it is when I am above that speed and accelerate onto the highway or around people.

I was going to just deal with it till my most recent experience. I hit the gas to get around someone and my RPM's hit 6k... she almost redlined till I took the foot off the gas to allow it to shift. I can't tell exactly what is happening, but you should never almost redline in an automatic when going 40mph trying to accelerate onto the highway. It's like it's shifting down into 3rd and then giving it a bunch of gas and not shifting into 4th unless I take my foot off the gas and let it shift.

I am taking all your opinions to heart, but almost redlining in automatic really messed with my head.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
netcbc
Exterior - Body Parts CDN
2
08-21-2015 09:50 AM
Bean_VQ35DE
Engine, Drivetrain & Forced-Induction
49
08-03-2015 05:17 PM
VANST3R
Lights
2
07-27-2015 08:20 PM
laksjd84
Exterior - Body Parts
1
07-24-2015 05:12 PM
netcbc
Steering & Suspension CDN
0
07-24-2015 11:25 AM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Major accel hesitation G35 5AT?



All times are GMT -4. The time now is 02:16 PM.