LEON CR fluttering boost problem

[Scotty_b]

Warm=good then cold=bad makes me think somethings sticking or dodgy electricals.

Is the mushroom shapped unit in the system the n249? (digging out a photo now unless someone beats me to it)

This is really starting to pee me off now as its the only thing wrong with my car. Been to another dealer today and there telling me its the N75! When i told them in on my 4th one they didnt know what to suggest!

Has anyone got a schematic of the turbo system? Im just wondering if theres a pipe or something that we havent looked at as its tucked away???

 

[martin CR]

Warm=good then cold=bad makes me think somethings sticking or dodgy electricals.

Is the mushroom shapped unit in the system the n249? (digging out a photo now unless someone beats me to it)

This is really starting to pee me off now as its the only thing wrong with my car. Been to another dealer today and there telling me its the N75! When i told them in on my 4th one they didnt know what to suggest!

Has anyone got a schematic of the turbo system? Im just wondering if theres a pipe or something that we havent looked at as its tucked away???

I tried running with a blancked off DV, same problem, I have the VAG 210/225 engine manual, the turbo control section and drawings is about 40 pages on its own, I have now run with a blanked off DV, and tried a manual boost controller instead of the N75 with no luck, now I have another problem, split flexi on 4 month old BF down pipe, so that is another thing to change when I get my new one from them.

 

[Deancadman]

I was just reading this thread about boost drop out and i had the same problem with my Leon Cupra for a while, im not sure if it did it before i had a remap done at a local dodgey shop (i took it for the remap the day i bought the car) but it sure did afterwards. I took it to Awesome GTi and we swapped everything from the MAS to coilpacks,dump valves to N75 we even took apart the throttle body and cleaned that. After trying everything i noticed it did run better on V-Power petrol but was still hesitating just before the boost kicked in fully (if i floored it it was fine).
to be honest i had just about given up trying to solve it and tried to convince myself it would be sorted automatically when i eventually got my upgraded turbo and custom map when i did add something to my car that solved the problem...
I fit an Ecotek valve just before the inlet manifold on the vacum hose (just to see if i got any more power as they claimed) and it made my car much smoother and fixed the problem of the hesitation during accelleration.
now im sorry i am not technically minded so i cant tell you how or why it worked but all i can tell you is it did work and was probably the best fourty quid i ever spent because i was on the verge of selling the car and starting over with something else.
hope this helps

 

[sargey]

i hope you realise that an ecotek valve will eventually **** your engine up! it creates turbulence which isnt a good factor when you want a normal air flow not an irratic flow as it could cause detonation and pinking. I know this as i have been told and read about it (cant find link)

local boys in the local shop (your not welcome here...league of gentlemen quote kinda lol) proved to a customer that an ecotek valve is crap because they fitted something called a power boost valve or something along those lines i cant remember for definate, any way, they sell this thing in their motor factors (weston motorparts for reference) they fitted this valve instead of the ecotek and the owner of the car said it performed better and threw the ecotek in the bin

so, just thought id warn you that you could be in for trouble with that! regardless of what ecotek say.

My car is still having the same problem, boost is still dodgy and i can hear a distinctive dump from my dump valve when it fluctuates. and i know its a dump so dont anyone try and prove me wrong. still only in 1st and 2nd at low revs. not constant, intermittent
no ideas what the problem is!

 

[Deancadman]

hmm well like i said it fixe the problem..
as far as i understand it it creates turbulance in the fuel rail/mixture which helps the fuel to burn more efficiently or am i wrong?
are you refering to a FSE power boost valve? as in the adjustable fuel pressure regulator because i looked at one of these, the exact model was not listed for the Leon Cupra and was told the standard 1.8T VAG that fir most other cars with this engine `would probably fit`. It doesnt, the one on my car appears to be an integral part of the fuel rail, or at least very different from the FSE fitment.
can anyone else verify potenial problems with he Ecotek valve? i would hate to go back to how the car was before, but i would hate replacing pistons even more

 

[Scotty_b]

Well ive got a new turbo and actuator so i think between us we have replaced all the "well known" bits so i think it must be something we are overlooking, that and not all our cars are mapped the same etc. Maybe a small unit or an odd pipe thats hidden away? It also has to be common to the 1.8t as its on the R and cupra. Has anyone had a look on the other VAG websites for golfs etc to see if they have any similar problems?

 

[sargey]

hmm well like i said it fixe the problem..
as far as i understand it it creates turbulance in the fuel rail/mixture which helps the fuel to burn more efficiently or am i wrong?
are you refering to a FSE power boost valve? as in the adjustable fuel pressure regulator because i looked at one of these, the exact model was not listed for the Leon Cupra and was told the standard 1.8T VAG that fir most other cars with this engine `would probably fit`. It doesnt, the one on my car appears to be an integral part of the fuel rail, or at least very different from the FSE fitment.
can anyone else verify potenial problems with he Ecotek valve? i would hate to go back to how the car was before, but i would hate replacing pistons even more

I can guarentee that you will need replacement parts with the ecotek, just spoke to my bruv and he confirmed about detonation, pinking and pre-mature detonation.

i think its the FSE power boost valve but i cant be sure, if im not mistaken it should work for the whole range of 1.8t alternatives but thats your better bet than an ecotek valve.

my mate in his 1.8t golf gti doesnt seem to have this problem with the boost but mind you not everyone on this forum has this problem. so it could be the odd few or it might be more noticeable to those with boost guages (i.e. different setups)
i could be wrong. I cant understand this problem at all.
Ive had a new MAF & new N75F within the last 4-5 months and neither have changed my problem....soooo....sod knows

 

[Pabs]

I tried running with a blancked off DV, same problem, I have the VAG 210/225 engine manual, the turbo control section and drawings is about 40 pages on its own, I have now run with a blanked off DV, and tried a manual boost controller instead of the N75 with no luck, now I have another problem, split flexi on 4 month old BF down pipe, so that is another thing to change when I get my new one from them.

Another blueflame problem Damn.

Out of interest, which VAG engine manual do you have - I've not been able to find any - not that it's use to me as I only have the 180

 

[Scotty_b]

i think its the FSE power boost valve but i cant be sure, if im not mistaken it should work for the whole range of 1.8t alternatives but thats your better bet than an ecotek valve.:

I thought/was told that all the boost valve does is push more fuel through the system o unless you have major engine mods may not be much of an improvment?

Also does everyone run there DV from the FPR?

 

[sportbilly]

I still have this problem also - had it before new turbo and now still got it. Found a split in the red turbo hose which I though was the problem but its still there - bouncing boost. Obviously the turbo hose was a problem but there is still something else causing this problem and it looks like a few of us. Its been find for 60,000+ miles so its something thats happened after a while.

Again like other I have tried 3 different N75's and I cant see it being this anymore although an N75 fault does give similar problems.

 

[wild willy]

I Don't have boost issues but i have turbo stalling issues (turbulance) at low rpm in 6 gear. I'm not sure if all your issues are related but I'm sure most are. I know what is causing mine and i think it may be comon with some of you guys too , not certain but...............
HIGH FLOW EXHAUST SYSTEMS providing inadequate turbo back pressure.
I had a high flow system previous to this as Scotty knows and did not have these problems, as soon as i went Blue flame ... Hey Presto turbo turbulance.
Most of you guys have high flow systems too. If possible return to stock to prove the point.

 

[Scotty_b]

Who has BF systems?
I do but the only thing willy is my car never had this issue when the system was first put on, had my new turbo fitted then i got the problem. Must have been a good 6 months of the usual BF issues but not these?

 

[richybigman]

I have a blueflame d/p and 100 cell cat. My car's only done 17,000 miles, modded for about 10,000 miles. 1st and 2nd gear aren't really noticable but 3rd, 4th and 5th you can see and feel the boost fluctuating. For instance on the motorway i was going along at 70mph and went to put my foot down to overtake, usually i would hit 22psi and go but now it's only hitting 15psi and not running well. Could having too cold of air be an issue? As it seems fine on warm days. Who else has a BMC CDA???

 

[Deancadman]

yup i took off the ecotek valve and problem is back. i have decided to refit it as i have done 25,000 miles with it in place and no problems at all. Ill let ya know if it ever does cause any but i doubt it will. Sargey the FSE power boost valve is a fuel regulator its not the same as an ecotek valve and does something very different to the car so i dont understande why your friend removed his ecotek valve and fit the FSE valve instead as they are different and he could use both together. but anyway im running smooth again thats what counts atm.

 

[claudefrog]

yup i took off the ecotek valve and problem is back. i have decided to refit it as i have done 25,000 miles with it in place and no problems at all. Ill let ya know if it ever does cause any but i doubt it will. Sargey the FSE power boost valve is a fuel regulator its not the same as an ecotek valve and does something very different to the car so i dont understande why your friend removed his ecotek valve and fit the FSE valve instead as they are different and he could use both together. but anyway im running smooth again thats what counts atm.

Does this look like where your ecotek is fitted?

 

[NotApplicable]

I don't know whether this is going to confuse matters..
I have a similar problem to the original low end/6th gear acceleration fluttering boost, but with one small difference: mine's a diesel

I've had a remap and put a K&N filter in. SInce then I get this problem. With foot down at about 1500-1800 rpm in sixth, I get a chuff-chuff-chuff-chuff from the engine at a rate of twice a second.

As the LCR and the TDI Fr have such different plumbing, I can only think that there is some feedback loop in the ECU software that is not in control properly.

I also occasionally get fluttering boost where the car surges and then backs off at higher revs, but only when I'm on a light throttle.

Does this spark a thought with anyone?

 

[claudefrog]

With foot down at about 1500-1800 rpm in sixth, I get a chuff-chuff-chuff-chuff from the engine at a rate of twice a second.

you will kill your clutch driving like that

 

[NotApplicable]

you will kill your clutch driving like that

I only do it when I forget. On the diesel, that's about 55mph in 6th.

I'm on the Sachs Clutch group buy with the intent to get a better one.

 

[sargey]

Also does everyone run there DV from the FPR?

Mine is, i think i might just leave my car as it is, dont want to spend anymore money on it when it seems to be running fine. took me 4 months to get it to where it is now (running fine apart from this minor problem)

yup i took off the ecotek valve and problem is back. i have decided to refit it as i have done 25,000 miles with it in place and no problems at all. Ill let ya know if it ever does cause any but i doubt it will. Sargey the FSE power boost valve is a fuel regulator its not the same as an ecotek valve and does something very different to the car so i dont understande why your friend removed his ecotek valve and fit the FSE valve instead as they are different and he could use both together. but anyway im running smooth again thats what counts atm.

Just a quicky, not having a go so dont take it the wrong way i said i "think" its called that i dont know cos i havnt been in there in a such a long time, ill pop in and find out what its called and what it does compared to the ecotek valve as im only trying to help.
sorry if ive made some confusion or anythin

just browsed info on both ecotek and FSE and they do the same job, both remove flat spots, better throttle response, performance. the only thin the fse doesnt seem to say about is emissions and fuel consumption
http://www.proven-products.co.uk/products/fse_power_boost_valves.htm - FSE
http://www.ecotekplc.com/benefits.htm - Ecotek

but by different means. ecotek creates turbulence in the inlet manifold and the FSE just cranks up the fuel pressure.
which can be more damaging? increased fuel pressure or turbulence in the inlet manifold. turbulence is not a constant flow of air, its irratic, so there could be a point where there is either no air, little air or too much air, the ecu maybe a learning ecu but it adapts to constant figures (i hope im right in saying that, correct me if im wrong) not irratic figures which are changing constantly i.e. turbulence.

I hope so much that what i said not only makes sense but is correct, no doubt someone will correct me

 

[wild willy]

Who has BF systems?
I do but the only thing willy is my car never had this issue when the system was first put on, had my new turbo fitted then i got the problem. Must have been a good 6 months of the usual BF issues but not these?

Yours is a one off BF system, 200 cell CAT and 2.5 inch zorst, I specced em up with Stokey after the A&M fiasco, but i never got mine fitted in time and so had to go 100 cell cat and 2.75 inch zorst after.