Make a donation
« previous next »
Pages: [1] 2 3 4   Go Down

Author Topic: Any ideas? Misfire?  (Read 14139 times)

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Any ideas? Misfire?
« on: September 22, 2011, 10:37:02 am »
Since my remap I've thought a few times that the car has been running a bit odd. Just now, slight incline, 30mph, 5th gear, 1500rpm & the engine seemed to be behaving strangely. The revs dropped slightly then came back. This happened all the way up the hill. If I put my foot down it runs fine and only does this occasionally. The other times have been less obvious.

Any ideas?
Logged
GTI going...

Offline RedRobin

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 380
  • -Receive: 442
  • Posts: 16627
  • BIALI Motorsport's Chief Horn Blower
Re: Any ideas? Misfire?
« Reply #1 on: September 22, 2011, 10:57:58 am »
^
Random misfires are often a sign of a coilpack on the way out. Best to check (VAGcom log thingy) before it fails totally and potentially does damage.

Remapped 2.0T FSI engined cars should ideally have their plugs renewed every 10k miles.

Someone else will chip in re what else it could be.
Logged


On facebook: https://www.facebook.com/robin.procter.50

Throbbin' Red Mk5 GTI DSG with too many mods to list - Have Fun but Safe Journeys!

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #2 on: September 22, 2011, 11:14:28 am »
Cheers  :happy2:

New plugs fitted in March, coil packs on the recall done in July
Logged
GTI going...

Offline RedRobin

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 380
  • -Receive: 442
  • Posts: 16627
  • BIALI Motorsport's Chief Horn Blower
Re: Any ideas? Misfire?
« Reply #3 on: September 22, 2011, 12:53:48 pm »
^
Then the next question might be which remap?

Someone who can laptop log would doubtless be able to help more than me.
Logged


On facebook: https://www.facebook.com/robin.procter.50

Throbbin' Red Mk5 GTI DSG with too many mods to list - Have Fun but Safe Journeys!

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #4 on: September 22, 2011, 12:56:10 pm »
R Tech stage 1. I'll see if I can find a member with VCDS close to me (Bristol)
Logged
GTI going...

Offline RedRobin

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 380
  • -Receive: 442
  • Posts: 16627
  • BIALI Motorsport's Chief Horn Blower
Re: Any ideas? Misfire?
« Reply #5 on: September 22, 2011, 01:00:03 pm »
.
The R-Tech guy is normally very caring and helpful. But VCDS best starting point. Possibly a setting on the map but I'm guessing wildly.
Logged


On facebook: https://www.facebook.com/robin.procter.50

Throbbin' Red Mk5 GTI DSG with too many mods to list - Have Fun but Safe Journeys!

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #6 on: September 22, 2011, 01:04:33 pm »
I know Nick will be more than happy to have a look for me, and I'm not suggesting it's the remap either as I've only heard positive things about them. I reckon the remap has possibly exposed a weakness somewhere, although my mechanical knowledge is zero.
Logged
GTI going...

Offline fab5freddy

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 238
  • -Receive: 239
  • Posts: 2033
Re: Any ideas? Misfire?
« Reply #7 on: September 22, 2011, 01:29:02 pm »
Is it running a bit lumpy at idle? PCV maybe?
Logged

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #8 on: September 22, 2011, 01:33:17 pm »
Quote from: fab5freddy on September 22, 2011, 01:29:02 pm
Is it running a bit lumpy at idle? PCV maybe?

Idle seems fine. New PCV fitted at same time as remap, although that could be the issue. It makes some squeaks, which I think is caused by air in the PCV,
Logged
GTI going...

Offline bacillus

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 4
  • -Receive: 451
  • Posts: 6329
Re: Any ideas? Misfire?
« Reply #9 on: September 22, 2011, 02:47:13 pm »
Quote from: Weston on September 22, 2011, 11:14:28 am
Cheers  :happy2:

New plugs fitted in March, coil packs on the recall done in July

Don't exclude a new faulty coil pack as one member on here found out...
Logged
Without traction power is nothing!

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #10 on: September 26, 2011, 11:22:08 am »
Well I've scanned the car today and there's no codes at all  :confused:
Logged
GTI going...

Offline Tfsi_Mike

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 241
  • -Receive: 309
  • Posts: 10222
  • Go Large or Go Home
    • Tfsi Mikes Money Pit AKS / TTE / RTech St2+ Cupra
  • My Ride: http://www.mk5golfgti.co.uk/forum/index.php/topic,32721.msg402587.html#msg402587
Re: Any ideas? Misfire?
« Reply #11 on: September 26, 2011, 11:58:21 am »
Quote from: Weston on September 26, 2011, 11:22:08 am
Well I've scanned the car today and there's no codes at all  :confused:

Sick of this myself every 3-5k miles now, need a health check to see if there's an underlying problem
Logged

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #12 on: September 26, 2011, 12:14:03 pm »
When yours does it what's it like?
Logged
GTI going...

Offline Tfsi_Mike

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 241
  • -Receive: 309
  • Posts: 10222
  • Go Large or Go Home
    • Tfsi Mikes Money Pit AKS / TTE / RTech St2+ Cupra
  • My Ride: http://www.mk5golfgti.co.uk/forum/index.php/topic,32721.msg402587.html#msg402587
Re: Any ideas? Misfire?
« Reply #13 on: September 26, 2011, 12:40:52 pm »
Quote from: Weston on September 26, 2011, 12:14:03 pm
When yours does it what's it like?

Started off very slight when accelerating in 4,5 or 6th as if lost power for a fraction. 100 mikes later it was a prominent stutter. Switched to stock map to get to garage for new plugs
Logged

Offline Weston

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 25
  • -Receive: 32
  • Posts: 1496
Re: Any ideas? Misfire?
« Reply #14 on: September 26, 2011, 02:51:23 pm »
Hmm maybe it's not the same thing. Mines very intermittent. I wonder if it's the DSG hesitating on a change?
Logged
GTI going...
Pages: [1] 2 3 4   Go Up
« previous next »