Running with two sports cats?
#1
Running with two sports cats?
Have had problems getting my bug sti with ppp through the emissions test on last 2 Mot's despite getting the one prodrive cat piping hot,so i have the potentially crazy idea of buying a 2nd hand Milltek centre pipe which also has a sports cat therefore running with 2 sports cats which should make things easier at Mot time.
Would fitting a 2nd sports cat mean a remap?
Would fitting a 2nd sports cat mean a remap?
#4
Scooby Regular
My Prodrive sports cat barely scraped though the MOT last year. I should think this year will be worse. If it fails this year I think I'll just get a full decat pipe and buy a cheap standard downpipe to stick on every MOT.
#6
Yes,my first thought was to buy a new cobra downpipe with built in sports cat but these are £400+ so was just looking for an alternative solution (cheaper)
The Japspeed version is £250 which seems reasonable,although it is a 3 inch pipe.
I'm thinking this would be a like for like replacement for the prodrive cat without need for a remap?
#7
Scooby Regular
iTrader: (6)
A car with no cats can pass the MOT emission requirements (mine did) so I'd be looking into why it's failing rather than throwing parts and money at it.
it could be something as daft as a vac leak or dud sensor. Has anyone run thorough diagnostics on it yet?
it could be something as daft as a vac leak or dud sensor. Has anyone run thorough diagnostics on it yet?
Last edited by brendy76; 21 July 2015 at 09:12 PM.
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#8
Scooby Regular
#9
Just looking for a way to get the emissions down a bit so it will
pass easier.
The problem seems to be the fast idle test where it eventually manages to scrape through after a few tries even though the cat was well hot just before test.
Fast idle:
CO = 0.28
HC= 17
LAMDA = 0.993
Natural idle:
CO = 0.17
#10
Scooby Regular
iTrader: (46)
Post a wanted add up bud, you can get 3" to 2.5 adaptor on gay bay.
Yes,my first thought was to buy a new cobra downpipe with built in sports cat but these are £400+ so was just looking for an alternative solution (cheaper)
The Japspeed version is £250 which seems reasonable,although it is a 3 inch pipe.
I'm thinking this would be a like for like replacement for the prodrive cat without need for a remap?
The Japspeed version is £250 which seems reasonable,although it is a 3 inch pipe.
I'm thinking this would be a like for like replacement for the prodrive cat without need for a remap?
#13
Should be easy to change (in theory!) and i suppose i could just use it at MOT time although not sure if it will make the car throw trouble codes with the increased restriction.
#15
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Sometimes its the simplest of things, years ago I had a car that failed (not a scooby BTW) but one of the readings was 10x what it should have been, can't remember which one, anyway it turned out to be a £5 coolant temp sensor.
Before you go throwing money at the car have a garage test all of the sensors and you may have a fault code sitting in the ECU that hasn't registered an EML...... worth a try?
#16
Have just bought a standard OEM rear cat which i can swap for the prodrive cat delete pipe.
Should be easy to change (in theory!) and i suppose i could just use it at MOT time although not sure if it will make the car throw trouble codes with the increased restriction.
Should be easy to change (in theory!) and i suppose i could just use it at MOT time although not sure if it will make the car throw trouble codes with the increased restriction.
Managed to get this done at the weekend,although did have problems with two of the exhaust nuts which needed intensive "persuasion" to free off.
Car is running fine so far with no fault codes.
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