does that leave just the MAP? might just be that with the TIP your car is now hitting boost limits ? what map is it and are you able to get it tweaked/looked at?

does that leave just the MAP? might just be that with the TIP your car is now hitting boost limits ? what map is it and are you able to get it tweaked/looked at?

I think it's got to be an issue with the map now, I can't think of anything else mechanical or electrical that could cause it.

Ok so I put a different map on the car today (runs less boost), now hits around 0.8bar, drops to 0.6, goes back up to about 0.9bar and settles down to 0.7bar.

Then around 5500rpm it drops off gradually to around 0.4bar and holds to the redline.

No misfire now.

So tomorrow I think i'll pick up a new set of plugs (just incase 1 of mine has been damaged), I will gap them to 0.6mm and then put the other map back on and see how it goes.

what plugs you using? I run the BKR7E and with the normal coils they used to misfire at the proper gap so like a lot recommend( and even more try and rubbish) I gapped them down to I think it was 28 instead of 30 and it cured the misfire. But I am also running LPG and now I have the 2.0T coils from a Mk6 Golf Mine are gapped at 31-32 with no misfire (also improves economy and power)

infuriating engine the 1.8T but very rewarding when they are running right.

You need some coil pack adaptors to run tfsi ones ;-)

I sell them now ;-)

what plugs you using? I run the BKR7E and with the normal coils they used to misfire at the proper gap so like a lot recommend( and even more try and rubbish) I gapped them down to I think it was 28 instead of 30 and it cured the misfire. But I am also running LPG and now I have the 2.0T coils from a Mk6 Golf Mine are gapped at 31-32 with no misfire (also improves economy and power)

I have tried it with the old Platinums that they run as standard, and also 2 sets of BKR7E, 1 set gapped to 0.8mm, and the other set gapped to 0.6mm.

infuriating engine the 1.8T but very rewarding when they are running right.

Starting to loose interest now tbh.

You need some coil pack adaptors to run tfsi ones ;-)

I sell them now ;-)

Funny that some guy on facebook (no idea who he is) is suddenly selling those too lol

he he that will be the really good looking guy by the name of clive ;-)

fresh of the cnc machine you want some ???

he he that will be the really good looking guy by the name of clive ;-)

fresh of the cnc machine you want some ???

Only if they come with a free set of tfsi coilpacks, as at the moment i'm ready to chuck a gallon fuel and a box of swan at the f***in thing.

, as at the moment i'm ready to chuck a gallon fuel and a box of swan at the f***in thing.

I know that feeling, I got an undiagnosed issue with mine that's making feel the same way !!

I feel your pain bro.

Sorry I couldn't be of anymore help with yours, it's all a bit technical isn't it

I know that feeling, I got an undiagnosed issue with mine that's making feel the same way !!

I feel your pain bro.

Sorry I couldn't be of anymore help with yours, it's all a bit technical isn't it

The only saving grace is that so far i've not had to buy anything, if I didn't have spare car, I think i'd have spent about £400 - £500 by now and not been any further into solving the issue.

You need some coil pack adaptors to run tfsi ones ;-)

What are the adapters for? are they just hold downs or are they for locating on the rubbers i.e. making the holes deeper? All I did was slide the rubbers down the coil pack a bit and they haven't moved so far (been a while now as well) but then I am rather tight

Cossie

do you know if your maps are written for Bosch or Hitachi mafs?

are your maps aware the n249 is no longer an option when regulating boost?

who wrote your maps? can they supply a map to match current hardware setup?

if not put back maf and n249/n75 setup and get map known to mirror.

what are your STFT and LTFT currently showing?

Cossie

do you know if your maps are written for Bosch or Hitachi mafs?

are your maps aware the n249 is no longer an option when regulating boost?

who wrote your maps? can they supply a map to match current hardware setup?

if not put back maf and n249/n75 setup and get map known to mirror.

what are your STFT and LTFT currently showing?

I have no idea, but it was running fine for a month or so, until I changed the TIP, so I don't think it's a hardware issue (as in written for the wrong maf).

As for the N249 that has been bypassed since last year, even when on the standard map, so it's nothing to do with that as again it ran fine for over a month.

I don't know which blocks to log for the STFT and LTFT, if you can tell me, I will log them tomorrow to check.

Also worth noting, I have now refitted the stock TIP and the problem is still there, I have checked every hose now for leaks and all I could come up with was the clip on the bottom hose (metal pipe to pancake), had partly unclipped on 1 side, I reclipped it last night and it came apart again as soon as I went on boost. So today I swapped the metal pipe and hose with the 1 from my other vrs, and it made no difference (that 1 is still clipped together, so it wasnt leaking boost).

The only thing I still haven't changed is the injectors, so I will be doing that tomorrow, and if that doesn't solve it, I am completely out of ideas.

Also I did a compression test, all 4 cylinders are between 175 and 180psi.

Additive and multiplicative trims are shown in meas block 032.

I also wanted to torch my octy several times during last two years.I`am currently trying to solve sudden boost drop @5800rpm, it holds in fifth gear@5500rpm cca 0.9-1.0 bar of pressure but sometimes it suddenly drops to 0.6bar but nothing like you are experiencing. I suspect that the problem is in lean AFR but I can`t test it because of the bad weather, 4 bar FPR is installed&waiting to be tested.

Do you have boost gauge? Can you make a video and post it here?

Additive and multiplicative trims are shown in meas block 032.

I also wanted to torch my octy several times during last two years.I`am currently trying to solve sudden boost drop @5800rpm, it holds in fifth gear@5500rpm cca 0.9-1.0 bar of pressure but sometimes it suddenly drops to 0.6bar but nothing like you are experiencing. I suspect that the problem is in lean AFR but I can`t test it because of the bad weather, 4 bar FPR is installed&waiting to be tested.

Do you have boost gauge? Can you make a video and post it here?

I do have a boost gauge, but where it's mounted it might be tricky to video it.

I am going to borrow my mates cupra R fuel pump over the weekend and give that a try, but right now i'm off out to remove the injectors and swap them over with the other car.

You can try video it with laptop and external video usb cam. Just tape the cam somewhere and gun it

the fuel trims give a good indication of the map quality and can help diagnose for leaks (be it vac and boost). It also shows you what the ECU has learnt in terms of hardware involved with the combustion process.

First thing would be to look at the trims when idling and when engine is hot (closed loop) If you can, make a log with the rpm, the trims, maf readings, wastegate duty, AFR, ignition timing, AIT

can you indicate when the map was uploaded and how many miles you have accumulated since that upload?

When did you last align the TB?

I am reading the posts again and making a note of the hardware you are running, but am getting confused with regards to the valves and bypasses you have made.

Can you indicate the N75 config (the one opening the wastegate),

your N249 (the one controlling the DV),

what DV have you got and which way have you got it installed?

Yes it pays to get '7'-plugs, gap them correctly and make sure your coils are good and stay in place, so can you confirm you have sorted that out too?

Ok here is a video of the boost gauge, when on boost, despite the sound, it was full throttle.

the fuel trims give a good indication of the map quality and can help diagnose for leaks (be it vac and boost). It also shows you what the ECU has learnt in terms of hardware involved with the combustion process.

First thing would be to look at the trims when idling and when engine is hot (closed loop) If you can, make a log with the rpm, the trims, maf readings, wastegate duty, AFR, ignition timing, AIT

can you indicate when the map was uploaded and how many miles you have accumulated since that upload?

When did you last align the TB?

I am reading the posts again and making a note of the hardware you are running, but am getting confused with regards to the valves and bypasses you have made.

Can you indicate the N75 config (the one opening the wastegate),

your N249 (the one controlling the DV),

what DV have you got and which way have you got it installed?

Yes it pays to get '7'-plugs, gap them correctly and make sure your coils are good and stay in place, so can you confirm you have sorted that out too?

The logs from today are attached.

Map was first uploaded to the car about a month ago, but was re-uploaded 2 days ago total mileage until issue's arrose approx 600, total mileage in the last couple of days approx 40.

TB last aligned 2 days ago.

N249, N112, SAI, all removed

Vac hoses simplified

Evap system simplified

Suction pump system simplified

N75 is connected on this car

Current DV is standard, and was new in december, but have also tried forge 006 (new last month) and also forge split-R.

Heat range 7 plugs gapped to 0.6mm brand new 2 days ago and coil packs hold tight.

List of all parts changed / swapped over from my other vrs is now:

Maf

Map

Fuel Pump

Fuel Pressure reg

Fuel injectors

Coil packs

New fuel filter

New spark plugs

Turbo - pancake pipe

Refitted stock TIP

Refitted stock airbox

Since swapping the injectors over, a fault code was logged:

1 Fault Found:

16514 - Oxygen (Lambda) Sensor B1 S1: Malfunction in Circuit

P0130 - 35-10 - - - Intermittent

But it hasn't come back since I cleared it.

The only other faults that have been logged in the last few days are:

16795 - Secondary Air Injection System: Incorrect Flow Detected

P0411 - 35-00 - -

16804 - Catalyst System: Bank 1: Efficiency Below Threshold

P0420 - 35-00 - -

Which are both to be expected, as the SAI has been removed and there is a decat fitted.

None of these fault codes have brought the engine management light on though.

LOG-01-002-032-115.CSV

LOG-01-031-032-115.CSV

LOG-01-031-032-118.CSV

Can you feel the car doing that or just what boost gauge shows ??

As it wouldn't be the first time I've seen a shagged boost gauge do that also

You can feel it very clearly.

Okay

Who mapped it ??

It is just a map that was uploaded to another webisite.

I don't know for certain exactly who did the map.

think you should try and put it back to standard dude

think you should try and put it back to standard dude

I have tried it with the standard map, the boost is still up and down and drops right off around 5500rpm still, but doesn't misfire / splutter.