Notices

flat spot in 2nd gear

Thread Tools
 
Search this Thread
 
Old 03 February 2002, 09:55 PM
  #1  
BOOT
Scooby Regular
Thread Starter
 
BOOT's Avatar
 
Join Date: Nov 2001
Posts: 92
Likes: 0
Received 0 Likes on 0 Posts
Unhappy

In 2nd at about 3000 rpm and floor it not a lot happens, but change to 3rd and the power comes on big time.I am not one give my scoob much stick but this is some think I have noticed.
Is this the norm or does it have to go to back to the dealer?
Old 03 February 2002, 10:05 PM
  #2  
Yorkie
Scooby Regular
 
Yorkie's Avatar
 
Join Date: Jan 2002
Posts: 910
Likes: 0
Received 0 Likes on 0 Posts
Post

I have found that if I travel along behind a slow moving vehicle in second at 25 - 30 mph, if the vehicle increases speed and I do also, when I get the opportunity to overtake I floor the accelerator in 2nd and Oh Nooooo, there is the power of a 2 litre Mondeo. I ease off the throttle and floor it again, and whooosh it flies like it should. I suspect it is something to do with the turbo spooling up. It may be it gets caught off guard so to speak. I have no other problems with the car and I can live with this "once in a blue moon" situation. I Now tend to follow slow vehicles in third gear, then when I get chance to overtake, slot into 2nd and off we go at the pace we normally expect.
Old 03 February 2002, 10:25 PM
  #3  
paul w
Scooby Regular
 
paul w's Avatar
 
Join Date: Nov 1999
Location: lincoln
Posts: 1,092
Likes: 0
Received 0 Likes on 0 Posts
Post

Hi,

There was a good thread about this last year.If the car is held in 2nd at a constant rpm for a period of time then floored you only get about 10 psi of boost,something to do with eu noise regs or gearbox protection so you have to vary the rpm or throttle off and then back on before booting it and off she goes.

Have fun Paul
Old 03 February 2002, 11:52 PM
  #4  
paulwadams_my99
Scooby Regular
 
paulwadams_my99's Avatar
 
Join Date: May 2001
Posts: 488
Likes: 0
Received 0 Likes on 0 Posts
Post

and don't u hate it when it happens though! Just when you need it!
Old 04 February 2002, 01:46 PM
  #5  
Adam B
Scooby Regular
 
Adam B's Avatar
 
Join Date: Mar 1999
Posts: 345
Received 0 Likes on 0 Posts
Question


Hi Richard

... interesting date !


Cheers

Adam
Old 04 February 2002, 10:36 PM
  #6  
BOOT
Scooby Regular
Thread Starter
 
BOOT's Avatar
 
Join Date: Nov 2001
Posts: 92
Likes: 0
Received 0 Likes on 0 Posts
Talking

Thanks for the info.
Old 04 February 2002, 10:56 PM
  #7  
AliWrx
Scooby Regular
 
AliWrx's Avatar
 
Join Date: Feb 2002
Posts: 347
Likes: 0
Received 0 Likes on 0 Posts
Post

Would having the ppp fitted to my MY01 cure this or is it deeper in the cars workings than the ECU? I thought i was just imagining it up until now. Thank god im not going mad.........
Old 04 February 2002, 11:24 PM
  #8  
DJB
Scooby Regular
 
DJB's Avatar
 
Join Date: Jan 2000
Posts: 516
Likes: 0
Received 0 Likes on 0 Posts
Post

No, probably not because PPP cars still have to pass emissions tests too.

D.
Old 05 February 2002, 10:02 AM
  #9  
paulwadams_my99
Scooby Regular
 
paulwadams_my99's Avatar
 
Join Date: May 2001
Posts: 488
Likes: 0
Received 0 Likes on 0 Posts
Post

it makes no difference with PPP.

Cheers

Paul.
Old 06 February 2002, 12:16 PM
  #10  
RT
Scooby Regular
 
RT's Avatar
 
Join Date: May 2001
Posts: 720
Likes: 0
Received 0 Likes on 0 Posts
Post

Yes, this is to help in the drive by noise test. Essentially, the test involves driving up to a marked line at 50kmh in second gear. Upon hitting the line, "open the throttle fully as fast as possible". The noise measuring device is 20m or so down the road.

Once you hold a steady 50kmh or so in gear 2 for 2-3 seconds, the car recognises that you're trying to do the noise test, and will limit boost to 0.5bar. Way around this is to gradually but briskly open the throttle instead of flooring it. You won't lose any speed, and still get max boost.
Old 07 February 2002, 02:36 PM
  #11  
Jolly Green Monster 2
Scooby Regular
 
Jolly Green Monster 2's Avatar
 
Join Date: Dec 2001
Posts: 3,418
Likes: 0
Received 0 Likes on 0 Posts
Wink

I am glad they did this feature so they can get around the sound level test but surely that is a bit of a cheek...

Why didn't they sort the ECU so that the emmissions tests pass so we can have more power? i.e. if car started from cold and left running until warm then set fuel co to 0 etc...

Old 10 February 2002, 11:14 PM
  #12  
Raster
Scooby Regular
 
Raster's Avatar
 
Join Date: Dec 2001
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Post

Thanks, top information on the second gear peculiarities!! I bought my first Scoob yesterday, a WRX and had noticed that sometimes, when the car was held in 2nd for a while before booting, the acceleration was not the impressive (2ltr Mondeo, hehee wouldn't pull the skin off a rice pudding ) and third was actually pulling harder???.
I was convinced it was my driving, ie poorly timed gearchanges that was causing the oddness.
At least now i know what to do to guarrantee that nice "jeeeeesssSSSSUUUSSS" reaction from passangers
Old 14 February 2002, 05:22 PM
  #13  
blip
Scooby Regular
 
blip's Avatar
 
Join Date: Jan 2002
Posts: 495
Likes: 0
Received 0 Likes on 0 Posts
Post

Is this peculiarity found in all turbo MY's? I test drove a MY99 at the weekend and wasn't that impressed with the surge when I put my foot down in second. Having read this thread I'm thinking it was due to this, and the fact that I had held it at steady revs for a few moments in second gear before flooring it.
Old 14 February 2002, 06:10 PM
  #14  
Bitten Hero
Scooby Regular
 
Bitten Hero's Avatar
 
Join Date: Jul 2001
Posts: 766
Likes: 0
Received 0 Likes on 0 Posts
Post

Yep, I think they all do it - certainly MY99 onwards...

Richard
Old 15 February 2002, 01:10 PM
  #15  
DaveUK300
Scooby Regular
 
DaveUK300's Avatar
 
Join Date: Jan 2002
Posts: 122
Likes: 0
Received 0 Likes on 0 Posts
Post

Had my UK300 a couple of weeks now and experienced exactly the same - found that 2nd was flat whilst 3rd seemed to pull like a train.

Changed driving style now and either cane it everywhereor am a bit more gentle with the gas pedal and problem seems to gobit different from my old car where 2nd was the only gera to leave it in !!!
Old 18 February 2002, 01:47 PM
  #16  
RT
Scooby Regular
 
RT's Avatar
 
Join Date: May 2001
Posts: 720
Likes: 0
Received 0 Likes on 0 Posts
Post

Its *definitely* this feature. In my previous '00, I could get it to occur every single time the conditions were met. Hold gear 2 for 3-5sec at 50kmh, floor it.

0.5bar boost EVERY TIME.
Old 02 April 2002, 12:38 PM
  #17  
Bitten Hero
Scooby Regular
 
Bitten Hero's Avatar
 
Join Date: Jul 2001
Posts: 766
Likes: 0
Received 0 Likes on 0 Posts
Smile

If I had a quid for every time I answered this question

To aid the car through emission tests, the ECU spots when the car is held at 2500-3500rpm (roughly) in 2nd for more than a couple of seconds, as this normal means that it's about to go through the tests. What it does is then limit boost to 7-9psi when you accelerate, at least until around 5500rpm when it kicks back in to normal boost. This has the weird effect of you changing up at about 5500rpm to 3rd gear and accelerating more quickly!

The way to avoid it is either to lift off the accelerator and dip the clutch momentarily, and then burn off, or (preferably) stay in 3rd until you're just about to go and then drop down to second and immediately floor it.

It's a well-known 'feature'

Richard

[Edited by Bitten Hero - 2/4/2002 1:41:48 PM]
Old 02 April 2002, 05:55 PM
  #18  
Bitten Hero
Scooby Regular
 
Bitten Hero's Avatar
 
Join Date: Jul 2001
Posts: 766
Likes: 0
Received 0 Likes on 0 Posts
Post

Yep, always said I was ahead of myself

It's a bug in the BBS that means when you go back and edit a post, it reverses the date (US format to UK format), so 4th February (4/2) becomes 2nd April

Richard

[Edited by Bitten Hero - 2/4/2002 6:55:45 PM]
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
KAS35RSTI
Subaru
27
04 November 2021 07:12 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM
Cpt Jack Sparrow
Was it you?
7
05 October 2015 10:40 AM
Ganz1983
Subaru
5
02 October 2015 09:22 AM



Quick Reply: flat spot in 2nd gear



All times are GMT +1. The time now is 06:03 PM.