Do you need a re-map after De-Cat
#1
Scooby Regular
Thread Starter
Join Date: Mar 2004
Location: Pitsea
Posts: 116
Likes: 0
Received 0 Likes
on
0 Posts
Do you need a re-map after De-Cat
Hi..
Quick question...my car is 2003 STI Type UK
It already has a Afterburner backbox and the resonator section has been replaced.
If I fit a decat\sports cat down pipe and decat centre pipe will the car need to be remapped straight away ? - Hayward ans Scott are literally 5 mins from where I live you see so de-catting should be easy enough - then I can arrange re-map later...
I heard induction kits can make the scooby run lean unless it's remapped but what about de-cats ?
Cheers
Ian
Quick question...my car is 2003 STI Type UK
It already has a Afterburner backbox and the resonator section has been replaced.
If I fit a decat\sports cat down pipe and decat centre pipe will the car need to be remapped straight away ? - Hayward ans Scott are literally 5 mins from where I live you see so de-catting should be easy enough - then I can arrange re-map later...
I heard induction kits can make the scooby run lean unless it's remapped but what about de-cats ?
Cheers
Ian
#2
i had a 04 STI hayward and scott de-catted and it run fine i had the full exhaust system replaced without a re map. + a different air filter and ran fine not 1 problem at all, all you would need is a lamba sensor bypass for the ECU which they should supply / fit to stop throwing up faults.
#3
Scooby Regular
Join Date: Sep 2008
Location: Lincolnshire
Posts: 353
Likes: 0
Received 0 Likes
on
0 Posts
i had a 04 STI hayward and scott de-catted and it run fine i had the full exhaust system replaced without a re map. + a different air filter and ran fine not 1 problem at all, all you would need is a lamba sensor bypass for the ECU which they should supply / fit to stop throwing up faults.
#4
Scooby Regular
iTrader: (3)
Join Date: Aug 2000
Location: 1600cc's of twin scroll fun :)
Posts: 25,565
Likes: 0
Received 2 Likes
on
2 Posts
New Age STI's NEED a remap after a decat unless you want to be paying out for an engine rebuild, they boost spike which causes det and this ends up killing the engine.
Tony
Tony
Last edited by TonyBurns; 25 February 2009 at 01:26 PM.
#5
Scooby Regular
Join Date: Aug 2005
Location: 392/361 MY04 STi
Posts: 7,638
Likes: 0
Received 0 Likes
on
0 Posts
After decatting i had the CEL light on within 5 miles. I kept it below 3k RPM and off boost until the remap the following day.
#7
Scooby Regular
Join Date: Feb 2003
Location: CHIPP'N HAM
Posts: 3,931
Likes: 0
Received 0 Likes
on
0 Posts
Again.... very big gamble....my STI was spiking all over the place, with huge amounts of det (that was with just a de-cat down pipe and keeping the middle cat in)
Not worth the risk imho
Trending Topics
#8
Scooby Regular
Join Date: Feb 2003
Location: CHIPP'N HAM
Posts: 3,931
Likes: 0
Received 0 Likes
on
0 Posts
That CEL would have been most likely from the O2 sensor reading not from DET, but better to be safe than sorry...
Thread
Thread Starter
Forum
Replies
Last Post
Scott@ScoobySpares
Full Cars Breaking For Spares
61
11 January 2021 03:08 PM
Scott@ScoobySpares
Full Cars Breaking For Spares
55
05 August 2018 07:02 AM
Scott@ScoobySpares
Full Cars Breaking For Spares
7
14 December 2015 08:16 AM
air, catting, de, decat, downpipecom, exhaust, filter, hatch, hayward, impreza, porsche944, remap, scott, wrx, wwwhaywardscott