GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: l3w1s on 17 February 2009, 17:40
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ANYONE USING A DECAT DOWN PIPE ON THERE GTI TURB, ALSO DOES ANYONE KNOW WHAT SIZE DIAMETER THE STANDARD PIPE IS ?
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De-cat your 1.8T and it will be illegal :)
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But it'll be a fair bit quicker! :grin:
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Please dont shout!!
Which engine code?
If you remove the CAT and do not code out the lambda sensors it will most likely run pretty rough - and throw up lights ect
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I spoke with Nick at R tech about this and Rich ure right, his comments were I can code that sensor out easy and it'll run perfect.
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I spoke with Nick at R tech about this and Rich ure right, his comments were I can code that sensor out easy and it'll run perfect.
Are you going decat then philpy :evil:
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yea just had the down pipe delivered and its 2.5 inches and i need to know the size of the standard exhaust coz ive got to match them up for now, also prob gettin nick from R-tech to remap me soon so ill get him to code out the sensor. and its an AUM :smiley:
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yea just had the down pipe delivered and its 2.5 inches and i need to know the size of the standard exhaust coz ive got to match them up for now, also prob gettin nick from R-tech to remap me soon so ill get him to code out the sensor. and its an AUM :smiley:
Then just hope you don't get stopped by these :
http://www.transportoffice.gov.uk/crt/vehicledrivers/roadsidechecks/randommotemissionchecks/maintainingmotemissionsstandards.htm
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hopefully worth the risk, and ill just change it over if i do get caught out, gona try fit it tomoz hopefully wont be to much of a headache and can be swapped back an forth easy.
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Fail your MOT I would have thought as well?
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Fail your MOT I would have thought as well?
Yep
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iirc the aum has pre lambda and a post lambda sensors fitted therefore you cant fit a de-cat pipe and like said it would need the warning light coding out whereas the agu can run a de-cat pipe as it only has the (1) pre lambda sensor fitted
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iirc the aum has pre lambda and a post lambda sensors fitted therefore you cant fit a de-cat pipe and like said it would need the warning light coding out whereas the agu can run a de-cat pipe as it only has the (1) pre lambda sensor fitted
oh sh!t, prob should of looked in to this a bit more, what so theres no chance what so ever of me fitin this then, its got two holes in it that look a bit like there for sensors, what happens if i did fit it and didnt hook up the sensors?
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iirc the aum has pre lambda and a post lambda sensors fitted therefore you cant fit a de-cat pipe and like said it would need the warning light coding out whereas the agu can run a de-cat pipe as it only has the (1) pre lambda sensor fitted
oh sh!t, prob should of looked in to this a bit more, what so theres no chance what so ever of me fitin this then, its got two holes in it that look a bit like there for sensors, what happens if i did fit it and didnt hook up the sensors?
slim i would say tbh
the sensors need to be fitted on the aum engines the ecu relys on readings from the pre lambda sensor but the post one is just metering in effect what is going out of the exhaust i wouldnt advise running with neither of the sensors fitted
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iirc the aum has pre lambda and a post lambda sensors fitted therefore you cant fit a de-cat pipe and like said it would need the warning light coding out whereas the agu can run a de-cat pipe as it only has the (1) pre lambda sensor fitted
oh sh!t, prob should of looked in to this a bit more, what so theres no chance what so ever of me fitin this then, its got two holes in it that look a bit like there for sensors, what happens if i did fit it and didnt hook up the sensors?
slim i would say tbh
the sensors need to be fitted on the aum engines the ecu relys on readings from the pre lambda sensor but the post one is just metering in effect what is going out of the exhaust i wouldnt advise running with neither of the sensors fitted
but if i run it without the sensors will it just f**k up, is that what your saying, cant r-tech do anything bout that ?
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Why are you so keen to make your car illegal?
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iirc the aum has pre lambda and a post lambda sensors fitted therefore you cant fit a de-cat pipe and like said it would need the warning light coding out whereas the agu can run a de-cat pipe as it only has the (1) pre lambda sensor fitted
oh sh!t, prob should of looked in to this a bit more, what so theres no chance what so ever of me fitin this then, its got two holes in it that look a bit like there for sensors, what happens if i did fit it and didnt hook up the sensors?
slim i would say tbh
the sensors need to be fitted on the aum engines the ecu relys on readings from the pre lambda sensor but the post one is just metering in effect what is going out of the exhaust i wouldnt advise running with neither of the sensors fitted
but if i run it without the sensors will it just f**k up, is that what your saying, cant r-tech do anything bout that ?
basically yes have to speak to nick tbh but dont know if they could i think if you run like myself the miltek 3"downpipe/sports cat and it throws up the warning light which they can do that can be coded out and have read somewhere about a spacing washer that can be welded onto the lambda boss basically to space the tip of the lambda sensor iirc the aum engine with a sports cat needs to run 200cpi whereas an agu can run 100cpi
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Pretty sure there is a way around this. Some way of fooling the ecu to think it is recieving differant info via the post cat sensor.
If you are a member of ukmkiv.net then PM this member:
http://uk-mkivs.net/user/Profile.aspx?UserID=20877
He has done it and know's how to get around it. :wink:
HTH Sam
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I run a decat on my AGU and it's freed the revs up nicely. If I had an AUM I'd got for a sports cat though due to the sensors/engine warning lights
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I run a decat on my AGU and it's freed the revs up nicely. If I had an AUM I'd got for a sports cat though due to the sensors/engine warning lights
not to good with all this stuff but where do the sensors go, are they attached to the side of the down pipe or something or somewhere completly different, already got engine light on for something else, will it go into limp mode?
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I got de-cat and full exhaust on mine, throught the engine light on after 300 miles but runs perfect. Gone through both mot's using a tuning company. Only really need to turn the light off if your selling to someone fussy. No probs!!!
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I got de-cat and full exhaust on mine, throught the engine light on after 300 miles but runs perfect. Gone through both mot's using a tuning company. Only really need to turn the light off if your selling to someone fussy. No probs!!!
is yours AUM as well then do the lamda sensors plug in the side of the down pipe?
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:rolleyes:
Isn't it easier to get it fixed...
One is PRE cat so will be before the cat the other is POST cat, so after the cat. If you follow the link i provided above you will get an exact answer about how to fix it for good.
It's all very well driving around with the EM light on, but if you pick uo another fault, you won't know as you will assume the light is for the exhaust. Also the ECU may adjust setting to make the car run smoothly but reducing power/efficency.
If your going to go to the bother of getting it fitted, you just as well do the job properly IMO :laugh:
Sam
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:rolleyes:
Isn't it easier to get it fixed...
get what fixed?
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post edited and it was in reply to the previous post :grin:
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:rolleyes:
Isn't it easier to get it fixed...
One is PRE cat so will be before the cat the other is POST cat, so after the cat. If you follow the link i provided above you will get an exact answer about how to fix it for good.
It's all very well driving around with the EM light on, but if you pick uo another fault, you won't know as you will assume the light is for the exhaust. Also the ECU may adjust setting to make the car run smoothly but reducing power/efficency.
If your going to go to the bother of getting it fitted, you just as well do the job properly IMO :laugh:
Sam
yea got you now well ill have a look then and see what i can find out, not havin much luck getting logged in to that other forum at the mo. stupid temporary password!
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yeah im AUM, suppose your right, should get the second sensor disabled, ill pop down to him and he will do it for nothing for me, just a case of plugging in. See if there are some other faults too just incase lol.
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ill fit it then as i have nothing better to do tomoz and get nick to see what he can do when i go for a re-map. cheers guys.
also another problem that might hold me back the down pipe is 2.5 inch and was gona try to fit it with the standard cat-back system anyone know if this is 2.5 inch as well ?
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Should do but wont be 2.5" :sad:
Sam
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I would just buy a sport cat saves fooking around every year for the MOT :smiley: