Spark plug gaps

[AJP]

Where are you in the country?

South Yorks/North Notts, just south of Sheffield. I've messaged Tfsi_Mike and he's kindly agreed to help with VCDS. He's not too far away so I don't mind a little drive to hopefully shed some light on the misfires.

[AJP]

Well, that's yet another day of driving with no misfire. Done about 30 miles, varying from rolling around at low revs to 'spirited'.. Feels bang on.

Why is it tormenting me like this?!

[r5gtt]

Well, that's yet another day of driving with no misfire. Done about 30 miles, varying from rolling around at low revs to 'spirited'.. Feels bang on.

Why is it tormenting me like this?!

It wants you to go back to stage oem 

[AJP]

Well, that's yet another day of driving with no misfire. Done about 30 miles, varying from rolling around at low revs to 'spirited'.. Feels bang on.

Why is it tormenting me like this?!

It wants you to go back to stage oem 

Joking aside, it did seem to be straight after going Stage 2 that all the problems started. Half of me is wondering if it's more fuel cuts. But I really doubt it now the Loba is in, and these are proper misfires rather than the classic fuel cut symptoms I had before.

I guess I'll just have to keep driving it and see what happens. As much as it seems ok, I can't risk any situation where I'd have to rely on full acceleration like overtaking, because if it did suddenly misfire again it could be pretty dangerous.

TFSI Limbo. Oh the joy.

[r5gtt]

Jokes aside. Yes i recall you mentioning the issue started after stage 2 so Did you fit an RS4 fuel pressure valve on as I read Niki recommends this on stage 2.

[AJP]

Jokes aside. Yes i recall you mentioning the issue started after stage 2 so Did you fit an RS4 fuel pressure valve on as I read Niki recommends this on stage 2.

I didn't fit one, as from what Steve was telling me (I could be wrong) it sounded like something that would help a little bit, rather than being essential. At the time we agreed that we'd fit one the next time the car was in. In hindsight, I wish I had, as it's one more thing eliminated from troubleshooting at the very least.

[r5gtt]

It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.

[AJP]

It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.

Well if it does turn out to be an injector it'll be the perfect chance to stick an RS4 valve in!

Yeah it'll be a pain, but worth it. The way I see it, do as much as you can while you've got the inlet manifold off, then you've got peace of mind and won't have to worry about pulling it to bits again.

[Dan_FR]

It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.

RS4 is no benefit on K03.... at all.

[AJP]

It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.

RS4 is no benefit on K03.... at all.

Dan, we've been there and done this in another thread. Please don't take this the wrong way, but if one of the best TFSI specialists in the country tells me 'A' and a guy on a forum (as knowledgeable as you are) tells me 'B', I know which way I'm siding.

[r5gtt]

It's a shame you didn't have one fitted :-/ as ive got one ready to fit when doing the RFD and carbin clean this week if I get the time. it's going to be a pin but may as well get it done once it's all open. Hopefully you'll solve the mystery of the misfire.

Well if it does turn out to be an injector it'll be the perfect chance to stick an RS4 valve in!

Yeah it'll be a pain, but worth it. The way I see it, do as much as you can while you've got the inlet manifold off, then you've got peace of mind and won't have to worry about pulling it to bits again.

Yeah I'd check the injectors for sure as @fab5freddy said he's engine failed because of that.

I'm sticking the RS4 valve in for extra measures and I don't want to have to open that f****** inlet manifold twice. 

Sorry DAN_FR I donr want to take any chances in this one and if it's no benefit then at least it's in there preventing any other issues.

[Dan_FR]

Well it's your money/time. All I can do is advise, but 120 bar is easily sustained by the standard valve, that paperwork says the fuel target is met. mine holds 130 bar on the standard valve. Unless your valve is faulty or cracking early then it's pointless.

But yeah I'm out. Carry on guys

[r5gtt]

I don't want to sound rude or obnoxious but I'd like to fit this just to be on the safe side.

EDIT:

The RS4 valve Increases the max fuel system pressure before it relieves it so better to have it on a stage 2 and 2+ 

@AJP
Someone sent me this.
Like i said, stock handles 130 then opens to relieve pressure, but if you want to have a good amount of torque, you'll need the rs4 valve. When tuned, you may feel flat spots if you don't as most tunes request 130-133bar of fuel. Where as stock requests 127-130bar of fuel. Stock is really on the limit, but your tuner can decrease and tune around this for same peak Hp in the higher rev range.

[r5gtt]

Niki gower r tech 》》》

Fuel is needed for tuning,  the oem pumps cannot cope in the torque band and drop pressure and max out the injection angles..  a pump is 100% needed to run stage2+ torque numbers for sure. Both k03 and k04.     And to add to this, i dont sell pumps i just tune them.   I can do strong map non pump but at a compromise to the torque band.    Same with every tuner i know

Valves are needed to give a min of 5bar head room to stop the valve opening.  The valves come in hand to aid the pressures demands at stage 2+ when look at 350lbft+ and 130bar pressures... 3

[AJP]

Bit of a tangent but thanks for the info on fuelling @r5gtt!

I called in to Statller yesterday for a chat with Steve and managed to get booked in... for the end of September! So in the meantime all being well I'll be doing some data logging tomorrow with @Tfsi_Mike.

Engine is still running very nicely.