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Author Topic: Hesitancy while driving  (Read 2064 times)

Offline kodirl

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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?

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Offline titchy

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Re: Hesitancy while driving
« Reply #1 on: October 27, 2019, 08:50:34 am »
Does this happen at idle?
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Offline kodirl

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Re: Hesitancy while driving
« Reply #2 on: October 27, 2019, 12:09:04 pm »
No. Only when it's on the move.

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Offline titchy

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Re: Hesitancy while driving
« Reply #3 on: October 27, 2019, 05:20:56 pm »
possible leaky injector over fuelling
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Offline kodirl

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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?

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Offline titchy

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Re: Hesitancy while driving
« Reply #5 on: October 28, 2019, 10:56:40 am »
best put on vcds
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Offline Dan_FR

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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 »
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TFSI... Revo Stage 2+... . WMI.... VCDS HEX + CAN, MPPS, VAG Commander & VAG tacho - South Wales

Offline kodirl

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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?

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Offline titchy

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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
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Offline kodirl

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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

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Offline kodirl

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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

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Offline titchy

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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
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Offline kodirl

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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

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