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Discussion Starter · #1 ·
Hi Guys, I have a Skoda Octavia vRS 2.0 fsi t.

Long story short -

Originally I had my car mapped with APR tuning software. This resulted in bags more power and torque, but also a what can only be described as a cutting out problem. EG 3rd gear, 5500 rpm, off boost for a second, back on, back off, back on type of thing. Clearly happening under load.

I had the map removed, and tried a stage 1 revo map. No problems. Not as strong top end mind, but no cutting out.

Now I have a turbo back blueflame exhaust (200 cel cat), neuspeed induction kit, forge blow off valve, and stage 2 remap. The problem has returned.

Has anybody else experienced this "glitch" or have any idea what is causing it, as quite frankly, it's doing my tree in.

And as some of you are going to ask - the answer is - 0-60 now takes 5.65 seconds on dunlop race tyres, top speed is sat nav measured at 165 mph, power is in the region of 280 bhp, and over 300 ft/lbsof torque.

And yes, I have a permanant grin.
 

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Hi Skodadude<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>

The problem you have described is identical to the problem I have experienced with my MK5 GTi, at 5500rpm in 3rd gear under load the power backs off although it can strike at any time when being pushed it is most prominent at 5500rpm, also at times the exhaust warning light switches on and then will stay on for about 60 seconds. My mapping was carried out by superchips and also fitted is a turbo back Milltek system. Having been assured by superchips it is not possible for it to be the mapping, but after spending a day in Buckingham at superchips H/O and having the mapping removed and played with they managed to reduce the problem, superchips have now developed a new re map for the MK5 and are confident that they have cured the problem, the cause of the problem is allegedly to much fuel at high boost. My new mapping is being fitted shortly and hopefully it will cure the problem. Interestingly having gone from Superchips to a rolling road the operator advised me that my car was running to rich so maybe this could be linked to the problem. I know that several cars have experienced similar problems with re mapping but some of them are happy to live with the problem excepting it for the power increase they have achieved. <o:p></o:p>
 

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Hi,

I would strongly recommend that you try changing your plugs. I have found on chipped
cars running high boost that the spark can struggle. This feels like a misfire - jerky
power delivery. Try a plug 1 heat range colder with a smaller gap.
 

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Hi Skodadude<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>

The problem you have described is identical to the problem I have experienced with my MK5 GTi, at 5500rpm in 3rd gear under load the power backs off although it can strike at any time when being pushed it is most prominent at 5500rpm, also at times the exhaust warning light switches on and then will stay on for about 60 seconds. My mapping was carried out by superchips and also fitted is a turbo back Milltek system. Having been assured by superchips it is not possible for it to be the mapping, but after spending a day in Buckingham at superchips H/O and having the mapping removed and played with they managed to reduce the problem, superchips have now developed a new re map for the MK5 and are confident that they have cured the problem, the cause of the problem is allegedly to much fuel at high boost. My new mapping is being fitted shortly and hopefully it will cure the problem. Interestingly having gone from Superchips to a rolling road the operator advised me that my car was running to rich so maybe this could be linked to the problem. I know that several cars have experienced similar problems with re mapping but some of them are happy to live with the problem excepting it for the power increase they have achieved. <o:p></o:p>
Strange, had mine mapped at S/C last November, added Turbo back miltek recently and I have not experienced any of these problems ?!?

I don't often rev to 5,500 rpm as I generally let the torque do all the work, will give it some tonight and see if it happens but can't say I've ever noticed it before, in fact come to think of it I had a play with a V6 4 motion on monday and the car just pulled cleanly and left him behind, how obvious is this fault ?
 

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I had a similar problem, but mine was due to a leak on the O ring of my Forge Blow off valve. I had the BOV removed and have had no probs since.
 

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Well I'm pleased to report my car definetly does not have this fault, I tried it last night and it just pulls cleanly to the redline in any gear with no hesitation or warning lights, if not the BOV mentioned could it be mileage/service dependant as my car has only covered 6,000 miles ?
 

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Discussion Starter · #7 ·
Thanks guys.

Possibly not the BOV, as i had that removed to test the car without, and it was the same. The overfuelling sounds most plausable.
 

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Discussion Starter · #9 ·
Cheers. Development is imminent at a specialist tuning house. The Revo map is coming off I think. Part of the problem lies in the fact that the current s election of maps have been developed in other countries, and are mainly for the Golf, not the Octavia. Hopefully a couple of days in the hands of boffins should sort it. Might have less power, but as long as it functions properly, thats all  that matters.
 

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Superchips have fitted the new map 3 days ago and i can report that after much trying to emulate the fault, no problems as of yet, infact i have not even noticed any change in power.  The rolliing road will give me the answer to that though.  Speaking with the technician who fitted the new map he said that it is not a common problem but it affects only some cars fitted with both the map and the high flow cat, the original map was made for the normal exhaust system and at the time of development only cat back exhaust upgrades were availible. This might be a cop out for a programming fault, but the new map seems to have addressed the problem.  My fault was not there for some months and started as a gradual missfire, it has been a pain in the neck for 6 months now but with the help of both Superchips and Milltek the problem seems no more, a lot has to be said for both companys looking at my car and finding the fault.
 

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Discussion Starter · #11 ·
Sorted it chaps.

Taken the nuespeed induction kit off, and re fitted my oem engine cover and filter.

No more problems.

So, must have been too much air?

Who knows, but it's cured now.
 

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You should have got a custom map that could have taken advantage of the induction kit and its freer flowing capabililites - just like a de-catted exhaust etc.

It would seem that as your turbo was spinning up at its fastest rate high up in the rev range, it was sucking in way more air than the map can adapt to on the fueling side of things, or depending on the size of the injectors they may have been operating at 100% duty cycle (maxxed out). Bit unlikely but you never know.

So ECU was probably detecting quite a bit of detonation/knocking/pinking or whatever and so was shutting down the boost to prevent engine running lean for too long.
 

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Any issues with the Forge bov spacer just let me know and Ill get it taken care of .

We had a small batch or O rings that were supplied to the wrong specification by the manufactuerer . This has been taken care of ..................
 

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Superchiped Golf MK V 05 No other enging mods. I have the same problem with Superchip telling me that there is no problem with the file they installed. Then it was removet the misfire that accures after 5500rpm disappeared. I am waiting a few weeks for the problem to be resolved. But I see here with LOONEY he has been given a upgraded chip by superchip. I informed them about the problem and that another fourm member had a similar broblem which they sorted, and can I not have the same programme installed on my car, but I am still waiting on them to get back to me :-(

JC
 

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I've spoken to Dave about the Octavia problem but I'll post up my thoughts here for others to read.

From scouting around other forums etc it seems that there may be a torque limit written into the OEM software which may result in behaviour similar to ASR cutting in and killing the power.

Anyone else think this might be plausable?

It also appears that there are two types of fuel pressure regulator, the F type is recomended for mapped engines.
 

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It's the ECU that is adaptive Ken.

The map is a change of the various parameters but the ECU will still have it's adaptive learning cycle. Why do you ask?
 

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Curious as the problems noted seem to come from added mods after re-map..............especially with moded air intake....just curious.
 

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Unfortuantely i now have this same problem, whether or not it has always been there and it's only recently that i took it over 5500rpm who knows. The thing is my car is standard apart from the map, standard exhaust, cat and air intake.

The flat is only 5500rpm altough i think it was noticble at about 3500rpm although i could of imagined this......very annoying though and not sure what to do next.

Oh, and the car is Octavia VRSII........................
 

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I don't think this is all related to a remap my 100% standard Mk5 has the odd hesitation around 3500 revs when the outside temp is under 6c or so, twice I've had a complete loss of boost for a couple of seconds when nailing it around 5-6k when the engine is at heavy load going up hills etc. The car has only done this a few times and its hard for the dealer to locate as what always happens with these things it doesn't happen when they take it on a test drive ! I've only just noticed it only happens when the outside temp is low ish so hopefully get it along to the dealers on a cold morning. Dealer advised theres nothing coming up on VAS/Vag-com. I'm going to order a can bus cable so I can do a bit of logging boost requested to boost produced to see if I can pin point something if the dealer can't come up with anything. As the hesitation feels like it boosts for a second holds back ever so slightly then boost as normal again.

Its only done this I would say 20-30 times but it appears to be happening more frequently now may just be down to the colder days highlighting the problem more. I suspect on remapped cars, the remap is not the cause but simply making it more apparent.
 
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