Having 2.75" DP and De-Cat next weekend but...

GaryM · 25-11-2004, 23:19

I am having a 2.75" DP and De-Cat fitted next weekend on my Golf 1.8T AUQ.

Will I experience problems with the post cat sensor reading the same levels as my pre cat sensor?
Whats the worst that can happen? Emmissions light on the dash? Performance isnt retarded in anyway is it?

Anyway around this?
I was told that Revo can program the light out but this may be costly and a little drastic.

DaveU · 26-11-2004, 07:34

No performance loss (gains + more noise

).

CEL will be on after a few hundred miles. You can reset it through OBD but it will keep coming back on.

Let me know if REVO can program out the light (I doubt they can).

Good luck

EddyH · 26-11-2004, 12:16

Revo CAN program out the light by disabling the post cat lambda sensor, however I have no idea on the cost. The other option is to 'space' out the post cat lambda sensor so it sees less of the gas, how effective this is though I don't know.

DaveU · 26-11-2004, 14:23

Hi Eddy,

Forgive me if i'm being thick - but wouldn't disabling the post cat lamba sensor actually cause an error in itself (it sensor not working).

If they can actually do it, then presumably as most people dont have a decat it will be an isolated fix so could be applied (via OBD?) to a car with a remap from another supplier???

EddyH · 26-11-2004, 14:37

They disable the sensor completely just like they can disable the immobiliser for engine conversions which use the OEM ECU. Revo have cracked the complete ECU code rather than using software tools so they have the ability to change anything. I've had the VVT changed on my car which isn't normally done as part of a standard remap.

The only cars I know of that have had the post cat lambda sensor disabled also have Revo.

DaveH · 26-11-2004, 14:47

Quote:

Originally Posted by EddyH

I've had the VVT changed on my car which isn't normally done as part of a standard remap.

I thought that was top secret?

EddyH · 26-11-2004, 14:52

Quote:

Originally Posted by DaveH

I thought that was top secret?

OOPS!

GaryM · 26-11-2004, 17:01

Thats lads, I'll see what the results are with spacing the post cat sensor out.

25-11-2004, 23:19	#1
GaryM Briskodian Join Date: Jul 2004 Location: Nr Manchester Posts: 330 Thanks: 0 Thanked 0 Times in 0 Posts	Having 2.75" DP and De-Cat next weekend but... I am having a 2.75" DP and De-Cat fitted next weekend on my Golf 1.8T AUQ. Will I experience problems with the post cat sensor reading the same levels as my pre cat sensor? Whats the worst that can happen? Emmissions light on the dash? Performance isnt retarded in anyway is it? Anyway around this? I was told that Revo can program the light out but this may be costly and a little drastic. __________________

26-11-2004, 07:34	#2
DaveU VIP Join Date: Nov 2002 Location: South, then East a little bit. Posts: 2,455 Thanks: 0 Thanked 0 Times in 0 Posts	No performance loss (gains + more noise ). CEL will be on after a few hundred miles. You can reset it through OBD but it will keep coming back on. Let me know if REVO can program out the light (I doubt they can). Good luck __________________ Dave Dave's new runaround ^ The Beast: 2001-2007 (now re-homed). 5 1/2 years of frightening the living daylights out of other road users and ashaming various high end cars.

26-11-2004, 12:16	#3
EddyH Briskodian Join Date: Jun 2004 Location: West Yorkshire Posts: 4,902 Thanks: 41 Thanked 26 Times in 26 Posts	Revo CAN program out the light by disabling the post cat lambda sensor, however I have no idea on the cost. The other option is to 'space' out the post cat lambda sensor so it sees less of the gas, how effective this is though I don't know. __________________ EddyH Audi A6 Avant 2.7 TDI Audi A3 2.0 TDI Sport

26-11-2004, 14:23	#4
DaveU VIP Join Date: Nov 2002 Location: South, then East a little bit. Posts: 2,455 Thanks: 0 Thanked 0 Times in 0 Posts	Hi Eddy, Forgive me if i'm being thick - but wouldn't disabling the post cat lamba sensor actually cause an error in itself (it sensor not working). If they can actually do it, then presumably as most people dont have a decat it will be an isolated fix so could be applied (via OBD?) to a car with a remap from another supplier??? __________________ Dave Dave's new runaround ^ The Beast: 2001-2007 (now re-homed). 5 1/2 years of frightening the living daylights out of other road users and ashaming various high end cars.

26-11-2004, 14:37	#5
EddyH Briskodian Join Date: Jun 2004 Location: West Yorkshire Posts: 4,902 Thanks: 41 Thanked 26 Times in 26 Posts	They disable the sensor completely just like they can disable the immobiliser for engine conversions which use the OEM ECU. Revo have cracked the complete ECU code rather than using software tools so they have the ability to change anything. I've had the VVT changed on my car which isn't normally done as part of a standard remap. The only cars I know of that have had the post cat lambda sensor disabled also have Revo. __________________ EddyH Audi A6 Avant 2.7 TDI Audi A3 2.0 TDI Sport

26-11-2004, 17:01	#8
GaryM Briskodian Join Date: Jul 2004 Location: Nr Manchester Posts: 330 Thanks: 0 Thanked 0 Times in 0 Posts	Thats lads, I'll see what the results are with spacing the post cat sensor out. __________________

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