Jul 19, 2016
Is that the cylinder you had the misfire?
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does the coil pack smell of burnt motors?
if so its dead/dying
I haven't had Vag com on it yet (used to use works, don't have access now and cant find my lite lead since moving house)
I used a friends Delphi code reader laptop and it just said random multiple misfire.
Im aware that that's not as good as Vag com, its on my list of things to buy.
It smelt slightly, any ideas of what the orange **** is?
Im replaceing what I can see is broke by replacing the wiring harness for the coils, and a fresh set of coils to rule them out too.
Baby steps but im sick of ******* into the wind, fix what I knows wrong and go form there
Coil pack harness and 4 OEM coil packs ready to go in this week.
Compression tested to rule out basics .....
All is good
Coil harness has splits in it left right and centre as photo
This years been crazy with buying the house.
The cars not moved since Cadwell which was June or July.
The new coil pack harness is sitting on the passenger seat.
She lies dormant until next year I'm afraid. Hopefully the coil pack harness will sort my misfire issues!
She'll be out on track again next year all being well, She just needs some new tyres up front and some new pads.
So tyre wise I'm going to stick with my trusty NS2R. They're more than adequate for my driving skill and they're cheap as chips from Tyreleader.
With regards to pads, I've been using Ferodo DS3000.
Anyone used Carbon Lorraine brakes? My "Renault friends" swear by them and have ditched Ferodo.
My callipers are LEon Cuprs R Brembos.
Any input appreciated!
Coil pack wiring done!
Booked Croft on Friday 30th March
Hopefully my misfire on track woes are over.
The coil pack loom was cracked in approximately 1,258,963 places exposing bare wires, Im sure this could be the source of the misfires?
Good to hear your getting audi back in action, there hard work to keep going, especially if your spanking it around a track once a while!
Yeah my loom was the same! Bare wires everywhere, coil packs aswell seem to suffer from the heat, am on my third set. I had a set of bkr7e plugs in and didn't realise they were only good for 5k, car ended up misfiring like mad on track, plugs were cooked!
Is croft a full day?
Aye, shes been in the garage locked away since July (I think) when I did Cadwell. Just bought the house last year so the S3 was parked up over winter to plough on with house stuff like carpets etc
However, shes sat in the garage and avoiding all the **** weather!
Yeah I couldn't believe the state of the wiring, there were cracks everywhere on every single wire! Surely that could be contributing to my misfires!
We spliced into the loom as far back as physically possible to ensure all the bad wiring was removed.
New OEM coils fitted at the same time from TPS.
The BKR7EIX plugs were new for Cadwell, and that's all they've done so tempted to leave them.
Or for what its worth just change them for new anyways ?
Yeah Croft is a full day open pit lane, I love it. Nice long track with loads of fun parts.
Whats not fun is misfiring all the way down the pit lane straight, so I hope the missfires sorted!
Its not compression, that's all ok as in the posts above.
Ive logged fueling and lambda, which is also fine (Bill checked my logs)
Its got to be ignition based!
Ive got the spark plug fear.
Been reading that theres loads of fake NGK spark plugs on ebay, which is where Ive always got mine from.
Im gonna get some form AKS tuning or Opie oils to guarantee that they are the real deal.
Imagine if all this was down to fake spark plugs!
Also, tempted to get a new maf. MY old one is 2 years old now, and speaking to @badger5 a dodgy MAF could possibly give me the miss under high load in high gears.
Anyone else had this before?
Yeah I have heard about the plugs thing too... seems a really bizarre thing to 'copy' but nothing surprises me anymore
I have seen plenty of cars where the MAF is shot after only months... I went through 3 in 18 months at one point... its a service item imo... get one... if it works then great, if it doesn't then spare... as it will go at some point..
Whats the usual MAF symptoms?
generally under read... sometimes over read... you see it on the dyno as the reported airflow is way off what the power is... faulty MAF like this affects load calcs so ECU uses these to determine most of what it does (being load based)... can affect timing and AFR...
Last time I logged the car it was pulling timing and the maf reading was lower than it was just after Bill mapped the car.
It pulled 255 gs last log, and at bills was getting 275 gs and made 341.9 bhp.
Maybe its dying and under reading?
Would explain why when driving normal its fine, and only misses when under load?
I'm saying all this, I've replaced a cracked coil harness, replaced all 4 coils (Genuine TPS ones) and still not drove the car!
Its in for MOT a week Saturday so we shall see how it drives then before I go paying £100 or so for a new MAF ?
Pulling timing is a sign of an under reading MAF... timing advance is higher at lower loads so it will be adding say 25 degrees when it should be 20 degrees and subsequently it will be pulled as it hears knock
You know what, I'm gonna get a new one anyway ha ha
Thanks again for your input Tuffty
Will report back after MOT day and hopefully she's good!
Croft on good Friday is only a few weeks away
Do I get another set of Ferodo DS3000 or try Carbon Lorraine pads?
Budget no more than £200 really
@Prawn any dealings with CL brakes ?
CL are reportedly epic. I'd think R 6 needed for yours. They're not cheap though.
If changing away from ferrodo you'l need new discs though. Never change pad make / compound on a used disc. It's asking for trouble.
Didn't @desertstorm find a decent source for ds1. 11 at a very reasonable price?
Well my disks currently feel warped after the last trackday but I think it’s probs due to the ds3000 leaving pad deposits on the disks.
List before Croft
Get the MOT done next sat
Fit new track pads
Pray missfires under load have gone
Purchase new MAF and take a punt on it being that if it’s still missing
If al else fails... torch car
Unfortunately the DS1.11 pads I bought were off a seller on Ebay who had 2 sets and just wanted to get rid of them I think. At £150 for the set that's a good reduction on the normal price though.
Decided Im gonna stick with DS3000 from @badger5 going to order them Wednesday pay day.
Plugs I'm gonna order form Opie oils.
Saturdays drive to the MOT is D Day.
If its still missing under load, new MAF time !
Pads delivered within one working day, top notch service from @badger5 as always!
Cheapesgt on the net by a good stretch too !
Mot T minus 2 days, everything is crossed that the missfire has gone when I drive it !.
Weather too bad to really open her up, but the cars flying!
No Misses as of yet, all seems good. Going to keep running it this month and then its Croft on Good Friday !
Good stuff mate! Hope Croft goes well for you
After following posts about fake NGK spark plugs and miss fires, I thought why not for the sake of £30 try a new set.
This time, instead of EBAY I bought them from Opie Oils.
So last night I whipped the old plugs out, and what I found made me furious / laugh / cry / jump for joy.
The plugs were so obiously fake it was unreal.
The top of the plug had no dimple like the new ones.
The three black rings around the top of the plugs was a totally different size etc
The engraved writing was terrible compared to the real ones.
For reference, fake on the left and real on the right.. the photo of all 4 are the fake ones removed.
Check your plugs people!
While I was at it, I fitted the red TFSI coil pack wiring heat shield. Photo is terrible but you get the idea
blimey. goes to show.. buyer beware off random ebay sellers
Ive been soo lucky, they've obviously been contributing to my on track mis fires under load!
That's new plugs, new coil packs, new coil pack harness all done. Roll on Croft on the 30th and see if the miss fire has gone!
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