MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Technical Workshop => Topic started by: tony_danza on March 17, 2009, 09:01:43 am

Title: De-cats and lambda sensors
Post by: tony_danza on March 17, 2009, 09:01:43 am
I'm toying with the idea of de-catting the car, so is it best to have the map re-written to ignore the 2nd lambda sensor - or should I get a dummy lambda? if so, where from?
Title: Re: De-cats and lambda sensors
Post by: MAT ED30 on March 17, 2009, 10:02:53 am
stage 2 map takes care of it as jonny does not have a cat on his
Title: Re: De-cats and lambda sensors
Post by: tony_danza on March 17, 2009, 10:07:37 am
I remember him saying, however I don't have Revo - will have to speak to Superchips to see if they're happy to amend mine?
Title: Re: De-cats and lambda sensors
Post by: Top Cat on March 17, 2009, 03:41:17 pm
I have this problem, but just drive really fast all the time stopping me looking inside the cabin.  :laugh:
I keep meaning to ring up and find out if there is a fix for this without going to stage 2. Mike at Votex mentioned there is a little box you can buy to bypass it for the Jap cars, but doesn't know if there is one for the golf.  :smiley:
Title: Re: De-cats and lambda sensors
Post by: MAT ED30 on March 17, 2009, 03:50:45 pm
I have this problem, but just drive really fast all the time stopping me looking inside the cabin.  :laugh:
I keep meaning to ring up and find out if there is a fix for this without going to stage 2. Mike at Votex mentioned there is a little box you can buy to bypass it for the Jap cars, but doesn't know if there is one for the golf.  :smiley:

you should be stage 2 not mate as you have the exhaust on  :confused:
Title: Re: De-cats and lambda sensors
Post by: WhiteGTI on March 17, 2009, 04:00:03 pm
I don't think TC even has a map, so its not as if its a case of going from stage 1 to stage 2...

Which brings me to this question...TC are you planning on mapping at all?
Title: Re: De-cats and lambda sensors
Post by: Top Cat on March 17, 2009, 04:01:03 pm
I have this problem, but just drive really fast all the time stopping me looking inside the cabin.  :laugh:
I keep meaning to ring up and find out if there is a fix for this without going to stage 2. Mike at Votex mentioned there is a little box you can buy to bypass it for the Jap cars, but doesn't know if there is one for the golf.  :smiley:

you should be stage 2 not mate as you have the exhaust on  :confused:

I am not convinced by the benefits of stage 2, maybe just me getting my threads mixed up, but you Chris and RR all started having little niggley problems when going stage 2. As i say you may be able to explain them away with other causes but its not for me at this time. Its plenty fast at the moment.  :smiley:
Title: Re: De-cats and lambda sensors
Post by: WhiteGTI on March 17, 2009, 04:13:53 pm
I have this problem, but just drive really fast all the time stopping me looking inside the cabin.  :laugh:
I keep meaning to ring up and find out if there is a fix for this without going to stage 2. Mike at Votex mentioned there is a little box you can buy to bypass it for the Jap cars, but doesn't know if there is one for the golf.  :smiley:

you should be stage 2 not mate as you have the exhaust on  :confused:

I am not convinced by the benefits of stage 2, maybe just me getting my threads mixed up, but you Chris and RR all started having little niggley problems when going stage 2. As i say you may be able to explain them away with other causes but its not for me at this time. Its plenty fast at the moment.  :smiley:

My problems were all exhaust related. The CEL came on because an exhaust mount broke (where the exhaust joins), and so air was getting into the system pre-lambda, and therefore setting it off. Stage 2 has not affected my car in any adverse way  :smiley: Hope this helps.
Title: Re: De-cats and lambda sensors
Post by: MAT ED30 on March 17, 2009, 04:23:53 pm
Tc has been mapped for a few weeks now  :smiley:
Title: Re: De-cats and lambda sensors
Post by: WhiteGTI on March 17, 2009, 04:27:01 pm
Tc has been mapped for a few weeks now  :smiley:

Oh! My baddddd  :ashamed: :ashamed: :ashamed: :embarrassed: :chicken:
Title: Re: De-cats and lambda sensors
Post by: Top Cat on March 17, 2009, 04:29:11 pm
I base all my factual asumptions on specific hearsay, I know ben's ran fine on stage 2. Chris did your BHP go up any with stage 2.
Sorry for the hi-jack MR Danza.  :ashamed:
Title: Re: De-cats and lambda sensors
Post by: WhiteGTI on March 17, 2009, 04:35:39 pm
Can't tell you that Tom, I've had Stage 2 from the beginning  :smiley:
Title: Re: De-cats and lambda sensors
Post by: Top Cat on March 17, 2009, 04:37:54 pm
Can't tell you that Tom, I've had Stage 2 from the beginning  :smiley:

Oh my turn now  :ashamed: i didn't know that, i thought you went stage 2 when you finally plumped for the APR zorst.  :fighting2:
Title: Re: De-cats and lambda sensors
Post by: tony_danza on March 17, 2009, 04:59:00 pm
Hijack? Nah it's all relevant TC, as I'll possibly need a variant of stage2 to cope - unless I can find a dummy lambda to fool the ECU. 

I understand the majority of the issues to come from the fuel pump at stage 2, so I'm not that fussed really as I won't be pushing it to the limits in that respect. I'm hoping for different characteristics rather than a load more power.
Title: Re: De-cats and lambda sensors
Post by: bacillus on March 17, 2009, 05:20:54 pm
You could try this,  http://weapon-r.com/english/index.php?main_page=product_info&cPath=7&products_id=6219

The guys over on vortex and golfmkv forums have used it with good results.
Title: Re: De-cats and lambda sensors
Post by: tony_danza on March 17, 2009, 05:28:13 pm
Doesn't exactly say a lot, but seems to be what I'm after, thanks!....

*awaits call back from Milltek*
Title: Re: De-cats and lambda sensors
Post by: john_o on March 17, 2009, 06:04:01 pm
You could try this,  http://weapon-r.com/english/index.php?main_page=product_info&cPath=7&products_id=6219
The guys over on vortex and golfmkv forums have used it with good results.

try as I might I couldnt see any car related products on that website  :wink:
Title: Re: De-cats and lambda sensors
Post by: RedRobin on March 17, 2009, 06:11:23 pm

I am not convinced by the benefits of stage 2, maybe just me getting my threads mixed up, but you Chris and RR all started having little niggley problems when going stage 2.

As i say you may be able to explain them away with other causes but its not for me at this time. Its plenty fast at the moment.  :smiley:


....Really? That's the first I've heard of me having Revo Stage2 related problems.

Stage1 is plenty fast enough though. However, stock does feel sluggish after you've got used to either Stage1 or Stage2. The 'jump' between Stage1 to 2 feels far less than between stock and Stage1.
Title: Re: De-cats and lambda sensors
Post by: bacillus on March 17, 2009, 07:37:08 pm
You could try this,  http://weapon-r.com/english/index.php?main_page=product_info&cPath=7&products_id=6219
The guys over on vortex and golfmkv forums have used it with good results.

try as I might I couldnt see any car related products on that website  :wink:

Perhaps you were more interested in the ram air kit and free shipping...    :grin:
Title: Re: De-cats and lambda sensors
Post by: tony_danza on March 18, 2009, 12:44:35 pm
I've decided software is the best way to deal with this - to be updated next weekend.....  :wink:
Title: Re: De-cats and lambda sensors
Post by: Teutonic_Tamer on October 22, 2009, 11:47:52 am
stage 2 map takes care of it as jonny does not have a cat on his

Does Jonnys car pass the emissions test on the MoT?  :confused:
Title: Re: De-cats and lambda sensors
Post by: Andy on October 22, 2009, 12:22:08 pm
stage 2 map takes care of it as jonny does not have a cat on his

Does Jonnys car pass the emissions test on the MoT?  :confused:
If he knows a friendly mot tester it will :wink:its a instant fail if it hasn't got a cat on
Title: Re: De-cats and lambda sensors
Post by: NEWEY on October 22, 2009, 12:29:47 pm
stage 2 map takes care of it as jonny does not have a cat on his

Does Jonnys car pass the emissions test on the MoT?  :confused:
its a instant fail if it hasn't got a cat on
not true. its there in place for emissions but if your car can pass its mot without a cat thats fine. it has been known for some cars to actually pass the emissions test without a cat
Title: Re: De-cats and lambda sensors
Post by: Teutonic_Tamer on May 06, 2010, 07:54:53 pm
Bump . . .

Sooooo, are any de-catted GTIs passing the emissions test?
Title: Re: De-cats and lambda sensors
Post by: Tfsi_Mike on May 06, 2010, 07:59:57 pm

Maybe peoples de - cat sections are flanged so they can be swapped cum MOT time?  This apeals to me  :party:
Title: Re: De-cats and lambda sensors
Post by: RedRobin on May 06, 2010, 08:39:49 pm

Maybe peoples de - cat sections are flanged so they can be swapped cum MOT time?  This apeals to me  :party:

....Flanged cats, eh - Is anyone thinking what I'm thinking?  :evilgrin:
Title: Re: De-cats and lambda sensors
Post by: RedRobin on May 06, 2010, 08:51:33 pm

I am not convinced by the benefits of stage 2, maybe just me getting my threads mixed up, but you Chris and RR all started having little niggley problems when going stage 2. As i say you may be able to explain them away with other causes but its not for me at this time. Its plenty fast at the moment.  :smiley:

....That's absolutely fair enough, TC - Best to stick with what works for you. I enjoyed Stage1 and didn't move to Stage2 because I particularly wanted to. Any probs I initially had with Stage2 weren't directly related and due to Revo's ability to have the settings tweaked she's been running sweet for thousands of miles.. Never better as the girlie says in this vid: "Yeah I'm good, never better, never better"

 
Title: Re: De-cats and lambda sensors
Post by: Teutonic_Tamer on May 07, 2010, 11:42:24 am

Maybe peoples de - cat sections are flanged so they can be swapped cum MOT time?  This apeals to me  :party:
As much as I love a tasty flange, it still doesn't answer my question!

Wonder if Revo would know . . .
Title: Re: De-cats and lambda sensors
Post by: jonnyc on May 07, 2010, 11:57:30 am
I'd stick my neck out and say yes it would pass with no cat..

Based on figures of 2.0T FSI cars, with Revo map albeit, and sports cats, it suggests that they very well could..

There are plenty of cars out there when tuned, and not running pig rich, as they do with standard maps will pass an emissions test with no CAT in the exhaust..