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Author Topic: Miss fire?  (Read 5671 times)

Offline john_o

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Re: Miss fire?
« Reply #15 on: January 31, 2010, 11:15:21 pm »
3500 rpm is more fuel issue territory
as everyone says , logs are your friend  :happy2:
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Offline vRStu

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Re: Miss fire?
« Reply #16 on: January 31, 2010, 11:20:58 pm »
I'm not 100% sure it'll be fuel cut, as we know Micky has an AutoTech Fuel Pump fitted.

I'd be more inclined to think it's a software issue Micky, had you heard Simon (Sibart) has his misfire back again - Since disconnecting the battery for a clutch install.
Stu...

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Offline micky 32

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Re: Miss fire?
« Reply #17 on: January 31, 2010, 11:40:40 pm »
Interesting. However i have done nearly 10k since the KO4 conversion and this only came to light today so could it still be software related? If that is the case maybe a battery disconnect might make it ok for another 10k?. One thing i haven't mentioned is it probably is that hardest i have driven it since the bad ice since xmas. As the problem disappeared tonight maybe it's throat needed to be cleared lol
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Offline vRStu

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Re: Miss fire?
« Reply #18 on: January 31, 2010, 11:50:44 pm »
There certainly has been some discussion over it being a software issue and in fact it was mentioned on Friday when I bumped into Simon that both yourself and Harry seem to have been ok so far.
Stu...

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Offline Janner_Sy

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Re: Miss fire?
« Reply #19 on: January 31, 2010, 11:57:20 pm »
nope harry was suffering misfires on the awesomeGTI RR day the other weekend

Offline micky 32

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Re: Miss fire?
« Reply #20 on: February 02, 2010, 12:09:28 am »
I drove 150 miles + today. As mysteriously as the glitches under WOT appeared they have mysteriously  disappeared. It didn't do it once today....strange :happy2:
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Offline john_o

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Re: Miss fire?
« Reply #21 on: February 02, 2010, 07:46:32 am »
anyone also looked into

1. the amount the tank is filled when the misfires occur?
2. the evap system recall for mkv's
3. fitting of a catch can kit (to avoid PCV)

just some thoughts
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Offline vRS Carl

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Re: Miss fire?
« Reply #22 on: February 02, 2010, 08:09:19 am »

2. the evap system recall for mkv's
3. fitting of a catch can kit (to avoid PCV)

just some thoughts

Not heard about the EVAP recall. Certainly wasn't any recalls when i had mine serviced just before Xmas.

Catch can makes no difference as i have one on mine and still had the issue.

I recently have started to get the 5200rpm flat spot etc (it did feel a bit like fuel cut but not as harsh more like a misfire) this holds for about 2-300 rpm then all is fine again.

At first i thought it could be the Tesco 99 my missus decided to fill up with (women bless them!) but after 2 full tanks of V-Power it was still there.

On friday i replaced the MAF & the MAP and now it seems to have disappeared. However i had to do a bit of a spirited drive the other day so that may have cleared it too.

What i can surmise is the following:

My missus does a short drive to work every day (about 3 miles) in which the car doesn't have much chance to reach full temp (it's usually just there by the time she reaches work).

As the ECU is an Adaptive ECU i think it alters itself to this driving style. When i get in the car i still drive normally within speed limits i just  use the gears a lot differently to my missus.

After replacing the MAF & the MAP, i also cleaned the EVOMS filter to get rid of all the road grime etc, i had to do the spirited drive total was about 32 miles. Since then the car seems to be fine and although i posted originally i thought their was fu*k all difference the car now seems to be a lot stronger in the Mid-Range

So i think if you are suffering with the 5200rpm flat spot. Take the car for a bit of a spirited drive (15-20 miles) and it MAY just get everything back to normal.

Carl :happy2:
« Last Edit: February 02, 2010, 08:41:40 am by Mater »

Offline Janner_Sy

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Re: Miss fire?
« Reply #23 on: February 02, 2010, 08:46:23 am »
anyone also looked into

1. the amount the tank is filled when the misfires occur?
2. the evap system recall for mkv's
3. fitting of a catch can kit (to avoid PCV)

evap recall????? what does the evap do as i have had that fault light twice now.
just some thoughts

Offline Janner_Sy

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Re: Miss fire?
« Reply #24 on: February 02, 2010, 08:48:28 am »

2. the evap system recall for mkv's
3. fitting of a catch can kit (to avoid PCV)

just some thoughts

Not heard about the EVAP recall. Certainly wasn't any recalls when i had mine serviced just before Xmas.

Catch can makes no difference as i have one on mine and still had the issue.

I recently have started to get the 5200rpm flat spot etc (it did feel a bit like fuel cut but not as harsh more like a misfire) this holds for about 2-300 rpm then all is fine again.

At first i thought it could be the Tesco 99 my missus decided to fill up with (women bless them!) but after 2 full tanks of V-Power it was still there.

On friday i replaced the MAF & the MAP and now it seems to have disappeared. However i had to do a bit of a spirited drive the other day so that may have cleared it too.

What i can surmise is the following:

My missus does a short drive to work every day (about 3 miles) in which the car doesn't have much chance to reach full temp (it's usually just there by the time she reaches work).

As the ECU is an Adaptive ECU i think it alters itself to this driving style. When i get in the car i still drive normally within speed limits i just  use the gears a lot differently to my missus.

After replacing the MAF & the MAP, i also cleaned the EVOMS filter to get rid of all the road grime etc, i had to do the spirited drive total was about 32 miles. Since then the car seems to be fine and although i posted originally i thought their was fu*k all difference the car now seems to be a lot stronger in the Mid-Range

So i think if you are suffering with the 5200rpm flat spot. Take the car for a bit of a spirited drive (15-20 miles) and it MAY just get everything back to normal.

Carl :happy2:

MAF sensor didint remove the flat spot from mine, so MAP sensor it is, if not im changing hthe lambda sensor nexyt

Offline john_o

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Re: Miss fire?
« Reply #25 on: February 02, 2010, 09:06:14 am »
I have had a couple of 'contacts' mention this evap recall in relation to cars in the USA, but in the same breath as a possible indicator in the misfire issue too. im still digging  :happy2:

I'm not sure but it may be this one
"20-07-06 Evaporative Emission (EVAP) System, Diagnostic Trouble Code Diagnosis (April 4, 2007)"
but I cant get the doc to check it, anyone got it?

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Offline micky 32

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Re: Miss fire?
« Reply #26 on: February 07, 2010, 06:20:29 pm »
Well the misfire returned today suddenly and with a vengeance, car shuddering and like on 3 cylinders with the engine light flashing. Coil pack failed. The slight misfires i was getting must have been a warning one was about to go. It was an excuse to put my red RS4 ones in i got from the US 21 euro each delivered :happy2: Took about 20 miles or so for them to adapt, all is perfect now.

  Here is a pic with them installed:

 
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Offline vRS Carl

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Re: Miss fire?
« Reply #27 on: February 07, 2010, 07:29:02 pm »
Mickey you got a link for those coil packs?

Carl :happy2:

Offline Janner_Sy

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Re: Miss fire?
« Reply #28 on: February 07, 2010, 07:40:16 pm »
x2 share those links cos that is well cheap.


Offline micky 32

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Re: Miss fire?
« Reply #29 on: February 07, 2010, 10:29:08 pm »
This is where i got them, they sell the normal ones too for around same price.

http://www.dbcperformance.com/product_p/06e905115e.htm
2008 Octavia vRS K04'd , Forge twintercooler, Evoms, Autotech uprated pump, full Milltek exhaust 324bhp on JKM's rollers ;-)