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Author Topic: off for a decat custom what about 2nd o2 sensor advice NOW WITH PICS/VID  (Read 7845 times)

Offline davemk4

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off for a decat custom what about 2nd o2 sensor advice NOW WITH PICS/VID
« on: 14 February 2013, 20:52 »
bit late to be worrying about this now but im having a custom  3'' downpipe with 3'' decat with flanges wleded to the oem cat and flanges onto the downpipe and jetex system that way i have a plug in/drop out decat/cat set up.

but i have 2 o2 sensors now obv thinking ahead

http://www.awesomegti.com/car/vw/golfmk4/42-draft-designs-o2-sensor-spacer

this would be fine. but untill this arrives.....the engine light im sure will come on with the decat tommorow. this doesnt bother me BUT will this cause car to go into limp mode etc?
« Last Edit: 15 February 2013, 20:54 by davemk4 »
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline DubAndDubber

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #1 on: 14 February 2013, 20:54 »
A headache is what reading this gave me. *in voice of yoda*
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Mk5 Golf Gti 06'

Offline Scott D

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #2 on: 14 February 2013, 21:10 »
think a spacer on the 2nd lambda should prevent engine light coming on, shouldnt go into limp mode even if it does throw up a fault code
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2003 1.8T GTI 180 - APR Stage I, S2000 Filter, R-Tech Supersize TIP, Bilstein B12 Suspension, 18" OZ Superleggera, Recaro Heated Leathers, US Spec Rear Lights, N249/SAI/PCV Delete

1.8T AUQ - 241bhp & 286 ft-lb
R-Tech Map, Forge FMIC, SFS Oversized TIP, Ported Manifold, Milltek Turboback non res exhaust, Forge 007p, N249 & N112 delete, SAI delete, S2000 Air Filter, Sachs clutch & Lightweight Flywheel

Offline davemk4

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #3 on: 14 February 2013, 22:26 »
I hope not.
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline dom

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #4 on: 14 February 2013, 22:55 »
I've been running a decat for at least 5k miles and haven't had the engine management light thrown up yet :cool:
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Offline crazy golf

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #5 on: 15 February 2013, 00:27 »
probly from the little i know only the agu aint fussy with atmos dump valves and de cats
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Offline davemk4

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #6 on: 15 February 2013, 06:38 »
Mines a aum so a sneeze sets the light on lol
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline GTi_James

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #7 on: 15 February 2013, 08:23 »
Quote from: davemk4 on 15 February 2013, 06:38
Mines a aum so a sneeze sets the light on lol

+1  :angry:
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Mk4 Golf 1.8t AUM, Wintersports Addition. PiperX panel filter, 008p Forge DV, Toyosports DP 3", Miltek Anni Style CatBack non resonated, APR Sport CAT 200Cell, Catch Can RS4 Reps 18s, OEM R32 front and OEM

Offline davemk4

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #8 on: 15 February 2013, 09:16 »
Well we going to struggle getting the oem cat to fit the custom down pipe. So going to fit a drop in drop out free flowing cat.
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2001 mk4 GTI 1.8t AUM. k&n induction kit with customer heat shield, 3'' TIP, Forge 007P, Stage 1 map, N249 bypass, 3'' downpipe and decat, 2.75'' Jetex cat back non res, Koni shockers and H&R springs 35mm, dimpled and grooved disks front and back

Offline Metallix

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Re: off for a decat custom what about 2nd o2 sensor advice
« Reply #9 on: 15 February 2013, 09:31 »
Take a trip to the dyno, test the decat vs. the high flow cat.

Will show you if there is a gain to be had
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