tunit tuning box / limp home mode

Fabio 123 · 01-11-2007, 22:00

Hi,

just had a tunit fitted to my fabia vrs and decided when pritty much flat out in 6th, 130mph at around about 4000rpm it seems to go into what i think is limp home mode, stops accelerating and starts to slow down even though foot is still flat. Once slowed down back to a more reasonable speed the car just lacks any power what so ever and wont let you accelerate hard. Once you turn the engine off and restart again everything seems to be fine and back to normal. One more point, when accelerating through gears and taking the revvs up to around the 4000rpm mark everything seems to be fine its only when flat out in 6th.

any ideas??

cheers

p.s this was on a track day. not on the public roads!!

ric04vrs · 01-11-2007, 22:12

which track ?

one hell of a long straight on it

Fabio 123 · 01-11-2007, 22:22

well its not exactly a track, its more of an air strip with a few chicanes etc in it.

Decron · 01-11-2007, 22:25

That will be the ECU saying "You sustain this much longer and you will damage me"

Whats the problem? It's saving you from yourself.

jonny boy · 01-11-2007, 22:27

Quote:

Originally Posted by Decron

That will be the ECU saying "You sustain this much longer and you will damage me"

Whats the problem? It's saving you from yourself.

Exactly !

nickl0 · 01-11-2007, 22:44

Mine did this in belgium on the way to the 'Ring last month, it's only done it once before on the ring last year and didn't do it on there this year, even 4-up! switched the ignition off at about 80mph then back on (don't try this at home kids!) and then took it easy. It seems to do it more when the engine is really hot (logical really). Thought something would show up on vag-com but nothing, it was clean.

Fabio 123 · 01-11-2007, 22:48

I tried it on setting 9 (full bore setting) and it did it so i pulled over turned it off and changed the settings down abit to 7. Was ok for abit then it did it again. Its strange because you would think one of the warning lights would come on but nothing!!

**VRStu** · 02-11-2007, 07:52

It's probably gone on overboost. That is not unheard of even without a tuning box fitted when going flat out.

There will probably be a fault code stored if you are able to check.

ultra_joel88 · 02-11-2007, 09:13

turn the box down

ScoobyChris · 02-11-2007, 09:16

Not sure it's anything to do with the box - it's the car protecting itself.... Easier to just not max the car out

Chris

Fabio 123 · 02-11-2007, 10:26

This may seem like a stubid question. But surley the turbo would over boost even when going through the gears and taking the revs to over 4000rpm?

everythings fine when going through gears and taking the revvs beyond 4000.

faboka vrs · 02-11-2007, 10:39

Have you thought about going the dealers and explaining the problem to them?

Fabio 123 · 02-11-2007, 10:45

urrrrrrrm NOPE!!! lol

mind you from previous expeiences my local dealers wouldnt have a clue about anything like that. Think they just stick to servicing etc.

Decron · 02-11-2007, 10:50

Quote:

Originally Posted by Fabio 123

This may seem like a stubid question. But surley the turbo would over boost even when going through the gears and taking the revs to over 4000rpm?

everythings fine when going through gears and taking the revvs beyond 4000.

Not always.

You need to get the codes off the car to figure it out. However I would say the car is doing what it's supposed to given your thrashing the nuts off it.

akz · 02-11-2007, 16:58

my fabias re-mapped and this exact same thing happened to me when i was doing a similar speed, I lost power. its as though u lose boost and the ecu goes into safe mode.

I had lost power going through every gear. but I switched the engine off and let it sit for a while and the car was fine.

this is obviously a safety feature, which to me is a great thing, so u dont damage the engine!!!!!!!!

ScoobyChris · 02-11-2007, 17:00

Quote:

Originally Posted by akz

this is obviously a safety feature, which to me is a great thing, so u dont damage the engine!!!!!!!!

It's a safety feature and also a bloody dangerous feature imho!

Chris

akz · 02-11-2007, 17:11

Quote:

Originally Posted by ScoobyChris

It's a safety feature and also a bloody dangerous feature imho!

Chris

Totally agree with u there mate, but you've really got to kick the hole out the car to make it kick in

do you think theres anyway of turning it off/overwriting it???

oilburninnut · 02-11-2007, 21:12

Quote:

Originally Posted by akz

Totally agree with u there mate, but you've really got to kick the hole out the car to make it kick in

do you think theres anyway of turning it off/overwriting it???

Ok lets get this straight,you want to turn off a feature that saves you from killing the engine?What a great idea,pm me when you figure it out,i want mine doing

akz · 03-11-2007, 12:55

Quote:

Originally Posted by oilburninnut

Ok lets get this straight,you want to turn off a feature that saves you from killing the engine?What a great idea,pm me when you figure it out,i want mine doing

a never said that I was wanting to do it, I was mearly pindering wether there was a way of turning it off or not

Decron · 03-11-2007, 13:01

Quote:

Originally Posted by akz

a never said that I was wanting to do it, I was mearly pindering wether there was a way of turning it off or not

No.

01-11-2007, 22:00	#1
Fabio 123 Briskodian Join Date: Apr 2007 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	tunit tuning box / limp home mode Hi, just had a tunit fitted to my fabia vrs and decided when pritty much flat out in 6th, 130mph at around about 4000rpm it seems to go into what i think is limp home mode, stops accelerating and starts to slow down even though foot is still flat. Once slowed down back to a more reasonable speed the car just lacks any power what so ever and wont let you accelerate hard. Once you turn the engine off and restart again everything seems to be fine and back to normal. One more point, when accelerating through gears and taking the revvs up to around the 4000rpm mark everything seems to be fine its only when flat out in 6th. any ideas?? cheers p.s this was on a track day. not on the public roads!!

01-11-2007, 22:12	#2
ric04vrs I parked up 1st Join Date: Jan 2006 Location: not near enough to the Ring Posts: 6,106 Thanks: 29 Thanked 177 Times in 172 Posts	Re: tunit tuning box / limp home mode which track ? one hell of a long straight on it __________________ not so bored now

01-11-2007, 22:22	#3
Fabio 123 Briskodian Join Date: Apr 2007 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: tunit tuning box / limp home mode well its not exactly a track, its more of an air strip with a few chicanes etc in it.

01-11-2007, 22:25	#4
Decron It's all good Join Date: Oct 2005 Location: Cwmbran - South Wales Posts: 3,378 Thanks: 58 Thanked 223 Times in 172 Posts	Re: tunit tuning box / limp home mode That will be the ECU saying "You sustain this much longer and you will damage me" Whats the problem? It's saving you from yourself.

01-11-2007, 22:44	#6
nickl0 Briskodian Join Date: Jan 2006 Location: Newport Posts: 224 Thanks: 9 Thanked 4 Times in 4 Posts	Re: tunit tuning box / limp home mode Mine did this in belgium on the way to the 'Ring last month, it's only done it once before on the ring last year and didn't do it on there this year, even 4-up! switched the ignition off at about 80mph then back on (don't try this at home kids!) and then took it easy. It seems to do it more when the engine is really hot (logical really). Thought something would show up on vag-com but nothing, it was clean. __________________ Yellow 54 Plate vRS - Revo Technik Remap - Eibach Suspension - Sachs Paddle Clutch - Gloss Black Porsche Design 90s. South Wales Freshest VAG Meet - www.newportedition.com

01-11-2007, 22:48	#7
Fabio 123 Briskodian Join Date: Apr 2007 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: tunit tuning box / limp home mode I tried it on setting 9 (full bore setting) and it did it so i pulled over turned it off and changed the settings down abit to 7. Was ok for abit then it did it again. Its strange because you would think one of the warning lights would come on but nothing!!

02-11-2007, 07:52	#8
VRStu Briskoda Staff Join Date: Dec 2004 Location: Hampshire Posts: 20,454 Thanks: 116 Thanked 926 Times in 830 Posts	Re: tunit tuning box / limp home mode It's probably gone on overboost. That is not unheard of even without a tuning box fitted when going flat out. There will probably be a fault code stored if you are able to check. __________________ Stu - Freedom Pimp Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Buy My Octy for £11k - http://briskoda.net/skodas-sale/oct-07-57-octy-ii-vrs-hatch-2-0-tfsi-11k/125614/ Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

02-11-2007, 09:13	#9
ultra_joel88 Briskodian Join Date: Jun 2007 Location: Brecon/ Cardiff Posts: 2,275 Thanks: 21 Thanked 82 Times in 80 Posts	Re: tunit tuning box / limp home mode turn the box down __________________ '04 Fabia VRS - 312mm Brakes, Whiteline RARB, SEAT Sport Strut Brace, Pipercross Panel Filter & PD160 Intake, Pioneer and Infinity ICE, Custom exhaust system w/ de-cat, CCV Bypass w/ Catch Can, Boost + Volt Gauge, Window Tints

02-11-2007, 09:16	#10
ScoobyChris Briskodian Join Date: Mar 2003 Location: Andover Posts: 18,127 Thanks: 15 Thanked 327 Times in 285 Posts	Re: tunit tuning box / limp home mode Not sure it's anything to do with the box - it's the car protecting itself.... Easier to just not max the car out Chris __________________ Holding up the traffic in a little Italian..........

02-11-2007, 10:26	#11
Fabio 123 Briskodian Join Date: Apr 2007 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: tunit tuning box / limp home mode This may seem like a stubid question. But surley the turbo would over boost even when going through the gears and taking the revs to over 4000rpm? everythings fine when going through gears and taking the revvs beyond 4000.

02-11-2007, 10:39	#12
faboka vrs Briskodian Join Date: Oct 2003 Location: Merseyside Posts: 5,948 Thanks: 11 Thanked 35 Times in 35 Posts	Re: tunit tuning box / limp home mode Have you thought about going the dealers and explaining the problem to them? __________________ John Take away the poor damping, inadequate bushes, heavy diesel lump and spongy brakes its not a bad warm hatch

02-11-2007, 10:45	#13
Fabio 123 Briskodian Join Date: Apr 2007 Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Re: tunit tuning box / limp home mode urrrrrrrm NOPE!!! lol mind you from previous expeiences my local dealers wouldnt have a clue about anything like that. Think they just stick to servicing etc.

02-11-2007, 16:58	#15
akz Briskodian Join Date: Oct 2007 Posts: 110 Thanks: 0 Thanked 2 Times in 2 Posts	Re: tunit tuning box / limp home mode my fabias re-mapped and this exact same thing happened to me when i was doing a similar speed, I lost power. its as though u lose boost and the ecu goes into safe mode. I had lost power going through every gear. but I switched the engine off and let it sit for a while and the car was fine. this is obviously a safety feature, which to me is a great thing, so u dont damage the engine!!!!!!!!

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