Make a donation
« previous next »
Pages: [1]   Go Down

Author Topic: Hesitancy while driving  (Read 2093 times)

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Hesitancy while driving
« on: October 26, 2019, 08:41:39 pm »
Hey folks. I have had a lot of work
done recently on my GTI but I'm noticing that when driving on the motorway it seems to jump maybe 100-200revs for a second before going back down. This happens across the rev range and even when I have the cruise control on . It is very annoying to say the least as the car speeds up ever so slightly and then slows down and repeats the process. Has any one any idea what could be causing this?

Sent from my Mi A2 using Tapatalk
Logged

Offline titchy

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 0
  • -Receive: 33
  • Posts: 528
    • Email
Re: Hesitancy while driving
« Reply #1 on: October 27, 2019, 08:50:34 am »
Does this happen at idle?
Logged

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #2 on: October 27, 2019, 12:09:04 pm »
No. Only when it's on the move.

Sent from my Mi A2 using Tapatalk

Logged

Offline titchy

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 0
  • -Receive: 33
  • Posts: 528
    • Email
Re: Hesitancy while driving
« Reply #3 on: October 27, 2019, 05:20:56 pm »
possible leaky injector over fuelling
Logged

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #4 on: October 27, 2019, 05:22:38 pm »
Is there any way of doing DIY check to confirm this?

Sent from my Mi A2 using Tapatalk

Logged

Offline titchy

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 0
  • -Receive: 33
  • Posts: 528
    • Email
Re: Hesitancy while driving
« Reply #5 on: October 28, 2019, 10:56:40 am »
best put on vcds
Logged

Offline Dan_FR

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 132
  • -Receive: 189
  • Posts: 1845
  • wait...what?
    • Email
Re: Hesitancy while driving
« Reply #6 on: October 28, 2019, 11:28:09 am »
What intake and what are your fuel trims? Sounds like an air leak to me, PCV could possibly be faulty

Data logging with VCDS (or similar) is the next step
« Last Edit: October 28, 2019, 11:31:17 am by Dan_FR »
Logged
TFSI... Revo Stage 2+... . WMI.... VCDS HEX + CAN, MPPS, VAG Commander & VAG tacho - South Wales

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #7 on: October 28, 2019, 11:43:22 am »
Quote from: Dan_FR on October 28, 2019, 11:28:09 am
What intake and what are your fuel trims? Sounds like an air leak to me, PCV could possibly be faulty

Data logging with VCDS (or similar) is the next step
Standard intake. Fuel trims?

Sent from my Mi A2 using Tapatalk

Logged

Offline titchy

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 0
  • -Receive: 33
  • Posts: 528
    • Email
Re: Hesitancy while driving
« Reply #8 on: October 28, 2019, 12:02:34 pm »
you will need a scanner with live data function to check fuel trims hence vcds
Logged

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #9 on: October 28, 2019, 12:04:26 pm »
Quote from: titchy on October 28, 2019, 12:02:34 pm
you will need a scanner with live data function to check fuel trims hence vcds
Ok cheers

Sent from my Mi A2 using Tapatalk

Logged

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #10 on: October 28, 2019, 12:05:28 pm »
Is there a recommended vcds that I could buy . Obviously don't want one that's goin to cost a fortune but one for a DIY'er

Sent from my Mi A2 using Tapatalk

Logged

Offline titchy

  • Won't Shut up.
  • *****
  • Thank You
  • -Given: 0
  • -Receive: 33
  • Posts: 528
    • Email
Re: Hesitancy while driving
« Reply #11 on: October 28, 2019, 04:13:10 pm »
Gendan do a diy one around £220  a decent garage should charge around £45 theres a few here who have them if you can find someone near
Logged

Offline kodirl

  • Always Involved
  • ****
  • Thank You
  • -Given: 10
  • -Receive: 0
  • Posts: 61
    • Email
Re: Hesitancy while driving
« Reply #12 on: October 28, 2019, 04:28:48 pm »
Quote from: titchy on October 28, 2019, 04:13:10 pm
Gendan do a diy one around £220  a decent garage should charge around £45 theres a few here who have them if you can find someone near
Cheers mate for the information

Sent from my Mi A2 using Tapatalk

Logged
Pages: [1]   Go Up
« previous next »