Cooper_GTI Posted November 2, 2010 Report Share Posted November 2, 2010 Will decatting my 2001 GTI make the engine light come on and lose power?I want real stories from people who actual run decats on GTI's please...None of this word of mouth rubbish. Lol Quote Link to comment Share on other sites More sharing options...
Ad.... Posted November 2, 2010 Report Share Posted November 2, 2010 I de-catted mine, we just welding a piece of exhaust tubing so had no lambda sensor. It did mean the engine light came on but didn't bother me in the slightest. It felt like it pulled a lot better through the rev range, didn't feel restrictive and definatley didn't feel like it had lost power Never had it rolling roaded before/after so can't comment on bhp changes lol. Quote Link to comment Share on other sites More sharing options...
Cooper_GTI Posted November 2, 2010 Author Report Share Posted November 2, 2010 (edited) I de-catted mine, we just welding a piece of exhaust tubing so had no lambda sensor. It did mean the engine light came on but didn't bother me in the slightest. It felt like it pulled a lot better through the rev range, didn't feel restrictive and definatley didn't feel like it had lost power Never had it rolling roaded before/after so can't comment on bhp changes lol.Nice one mate! Thats the sort of thing i want to hear about.What did it do to the sound of it? Were you running a standard exhaust?Is there anything you can do to stop the EML light coming on? Edited November 2, 2010 by Cooper_GTI Quote Link to comment Share on other sites More sharing options...
JamesTdi Posted November 2, 2010 Report Share Posted November 2, 2010 Is there anything you can do to stop the EML light coming on? Place the sensor further down the pipe, correct me if im wrong anyone tho! Quote Link to comment Share on other sites More sharing options...
Philplop Posted November 2, 2010 Report Share Posted November 2, 2010 I'm sure nfbr mentioned that you can get a remap to write out the rear lambda sensor, as all it does is monitor the efficiency of the cat. Quote Link to comment Share on other sites More sharing options...
bithmeister Posted November 2, 2010 Report Share Posted November 2, 2010 de catting made mine feel slightly punchier through the gears,but it was slightly nosier to so sounded faster no top end differanceand the light will come on,not a problem if youve got vag-com u just keep turning it offi bined mine and put the cat back in, tbh it was a waste of 80 quid Quote Link to comment Share on other sites More sharing options...
Philplop Posted November 2, 2010 Report Share Posted November 2, 2010 Is not having a cat an automatic fail on an MOT, regardless of whether it passes the emissions test or not? Quote Link to comment Share on other sites More sharing options...
Ad.... Posted November 2, 2010 Report Share Posted November 2, 2010 Nice one mate! Thats the sort of thing i want to hear about.What did it do to the sound of it? Were you running a standard exhaust?Is there anything you can do to stop the EML light coming on? I had a standard exhaust but had the middle box taken out too! Made it raspy after 3k but not ott, not too loud either unless you gave it some stick! So say doing a steady 60 with your foot tickling the throttle and sounded pretty quiet. Hope that helps a little... Quote Link to comment Share on other sites More sharing options...
Cooper_GTI Posted November 2, 2010 Author Report Share Posted November 2, 2010 I just really done want my engine light flashing on all the time!What about a resistor on the end of the lambda? Quote Link to comment Share on other sites More sharing options...
marcusgrant Posted November 3, 2010 Report Share Posted November 3, 2010 Is not having a cat an automatic fail on an MOT, regardless of whether it passes the emissions test or not?From speaking to Mark and Dan on here i get the impression you dont need a CAT to pass an mot, its all based on emissions. Dan and Mark have both had decats (sport & gti) and past mot's Quote Link to comment Share on other sites More sharing options...
Cooper_GTI Posted November 3, 2010 Author Report Share Posted November 3, 2010 Ive been driving for 4 years. Every car i've every owned i have removed the cat.Escort GTISaxo VTSRado VR6MR2Now Lupo GTII've been pulled loads, but never has a cat even been been mentioned. Most cops dont know their arse from their elbow anyway!Decat it is!!!! Quote Link to comment Share on other sites More sharing options...
Cooper_GTI Posted November 3, 2010 Author Report Share Posted November 3, 2010 I just wanted to make sure it wouldnt run excessively rich/lean due to the poor lambda readings.From what i gather, the light is there just to say, "the cat isn't working properly", and it goes no deeper than this with regards to the actual running of the car.Fingers crossed! Getting a race manifold/decat/straight through centre section/standard back box. Quote Link to comment Share on other sites More sharing options...
Defcon5 Posted November 4, 2010 Report Share Posted November 4, 2010 I've been pulled loads, but never has a cat even been been mentioned. Most cops dont know their arse from their elbow anyway!Decat it is!!!!Whats your VRM again?//logs onto ANPR database Quote Link to comment Share on other sites More sharing options...
Cooper_GTI Posted November 4, 2010 Author Report Share Posted November 4, 2010 Whats your VRM again?//logs onto ANPR database Haha, my Reg is "DCAT FTW" Quote Link to comment Share on other sites More sharing options...
Gti paul Posted November 6, 2010 Report Share Posted November 6, 2010 FYI on Lamda On my previous motors ive always used a motorsports cat 100/200 cell ive noticed on my astra the Lamda sensor played up therefore placing my EML on which put the astra into limp mode on Dianostic showed it was running lean replaced sensor all was fine again.so if peeps are thinking of decat or running decat's its worth plumbing in the sensor back in to stop worst case enginge running lean and causing Major engine damage as my mates Z20let on a track day to lean 3rd cylinder disintegrated. Quote Link to comment Share on other sites More sharing options...
PoloG40 Posted November 8, 2010 Report Share Posted November 8, 2010 As Cooper_GTI said will fitting a resistor dothe trick? Quote Link to comment Share on other sites More sharing options...
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