« previous next »
Pages: [1] 2 3

Author Topic: Fixing a Flat Spot in the Rev Range  (Read 8780 times)

Offline RocketRossUK

  • I live here
  • *****
  • Posts: 1,186
Fixing a Flat Spot in the Rev Range
« on: 27 August 2013, 09:07 »
Hey guys,

Just a quicky, just the other day i felt a big flat spot in 3rd while accelerating. It has been fine up till this point so i can rule the map out. It doesn't seem to happen all the time. Really need to take it on a full run with loads of 3rd and 4th gear pulls

Main thing i would check is DV, Coils, Plugs. Just dont which order is best to try. Obviously i should check Dv first, but my jack is broke at the minute, so cant just whip it up and check.

Has anyone else had a flat spot and changed any of the above with good results.

 
Logged
MK6 GTI CSG | Revo Stage 2 | Revo Stage 2 Intake | Milltek 3" TB Exhaust | SuperPro Anti Lift Kit | H&R ARB's | Bilstein B12 | TT Short Shifter |Mintex M1144 Race Pads | HEL Braided Lines |

MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline barrym381

  • Forum addict
  • *
  • Posts: 5,935
Re: Fixing a Flat Spot in the Rev Range
« Reply #1 on: 27 August 2013, 10:10 »
a jack to get to your dv  :undecided:
Logged

Offline Poached

  • I live here
  • *****
  • Posts: 716
Re: Fixing a Flat Spot in the Rev Range
« Reply #2 on: 27 August 2013, 10:19 »
Going to need VCDS or a logging session really as this could be a number of things.

What RPM is the flat spot?
Logged

Offline Rhyso

  • Global Moderator
  • Sir Postalot
  • *****
  • Posts: 26,720
Re: Fixing a Flat Spot in the Rev Range
« Reply #3 on: 27 August 2013, 10:38 »
Quote from: barrym381 on 27 August 2013, 10:10
a jack to get to your dv  :undecided:

Its a MK6; its fitted at the back of the engine and underneath
Logged

Marshy

  • Guest
Re: Fixing a Flat Spot in the Rev Range
« Reply #4 on: 27 August 2013, 10:49 »
Ross I know you say its not the map but have you tried putting it back to standard to check?
Your bluefin aren't you? If so a quick easy check.
Logged

Offline RocketRossUK

  • I live here
  • *****
  • Posts: 1,186
Re: Fixing a Flat Spot in the Rev Range
« Reply #5 on: 27 August 2013, 11:10 »
Quote from: Marshy on 27 August 2013, 10:49
Ross I know you say its not the map but have you tried putting it back to standard to check?
Your bluefin aren't you? If so a quick easy check.

Its not map, it been pulling hard and fast for 2 months, wouldn't just change.

Its around 3000 revs. Im thinking it gonna be a teared DV, I remember when it happened on my MK5, think it did the same.

I have VCDs, what menu do you use to test boost / flatspots?
Logged
MK6 GTI CSG | Revo Stage 2 | Revo Stage 2 Intake | Milltek 3" TB Exhaust | SuperPro Anti Lift Kit | H&R ARB's | Bilstein B12 | TT Short Shifter |Mintex M1144 Race Pads | HEL Braided Lines |

MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline Rhyso

  • Global Moderator
  • Sir Postalot
  • *****
  • Posts: 26,720
Re: Fixing a Flat Spot in the Rev Range
« Reply #6 on: 27 August 2013, 11:19 »
Engine module

Think boost is block 110 / 115

Or they start at block 10
Logged

Offline RocketRossUK

  • I live here
  • *****
  • Posts: 1,186
Re: Fixing a Flat Spot in the Rev Range
« Reply #7 on: 27 August 2013, 11:34 »
Quote from: Rhyso on 27 August 2013, 11:19
Engine module

Think boost is block 110 / 115

Or they start at block 10

Thanks for the reply. Then what do you do with it? does it show you fault or lack off boost etc...
Logged
MK6 GTI CSG | Revo Stage 2 | Revo Stage 2 Intake | Milltek 3" TB Exhaust | SuperPro Anti Lift Kit | H&R ARB's | Bilstein B12 | TT Short Shifter |Mintex M1144 Race Pads | HEL Braided Lines |

MK5 GTI - DSG + Extras (Sold because DSG was Soooo Boring !!!)

Offline Poached

  • I live here
  • *****
  • Posts: 716
Re: Fixing a Flat Spot in the Rev Range
« Reply #8 on: 27 August 2013, 12:23 »
Firstly see if you have any faults stored in the ecu memory.

Then you could measure boost pressure requested vs actual boost pressure produced with N75% (Wastegate).

There are many variables you can measure in VCDS. You are probably best exporting the data to excel and producing a graph to see what's happening or taking it to a tuner with a dyno to test in a controlled environment.
« Last Edit: 27 August 2013, 12:25 by Poached »
Logged

Offline Rhyso

  • Global Moderator
  • Sir Postalot
  • *****
  • Posts: 26,720
Re: Fixing a Flat Spot in the Rev Range
« Reply #9 on: 27 August 2013, 12:46 »
As per Poache's reply  :smiley:

It will give you specified VS actual values so you will see if you are losing boost  :nerd:
Logged
Pages: [1] 2 3
« previous next »