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Christopher
ClioSport Club Member
Z4M
i have heard of sports cats still failing MOT's :S
R35 GTR
I had a decat, but got rid due to fears of not passing mot. I have a sports cat now.
R35 GTR
No idea. Just dropped car off and went to work.
Ah right, Yeah I did the same with mine last week. Almost failed on the front right tyre which was nearly near the legal limit.
a thirsty one
make sure the sports cat are really hot before they take any readings, the 100cell jobbies need to be really hot, also can you wind the boost down a bit? that should help and maybe some of that emission reducing tank addative you see in halfords as a last resort? may work havnt tried it.
unplug an injector at the test centre, it drops the co enough lol
R35 GTR
won't running more air enable that extra fuel to burn giving your car more emissions? I'm not big up on engines lol just a thought.
[quote=LegoHead;3217313]
hmmmm....really?
[/quote]
Sure, it mis-fires obviously, but it drops the co right down.
I was tempted to do it like that on my 172 when i couldnt get it though emmissions as i wasnt going to pay out for 2 lambda sensors. Mine dropped into the required from 7%co.
hmmmm....really?
[/quote]Sure, it mis-fires obviously, but it drops the co right down.
I was tempted to do it like that on my 172 when i couldnt get it though emmissions as i wasnt going to pay out for 2 lambda sensors. Mine dropped into the required from 7%co.
Volvo S60 T5
Thats going to be more than a cat IMO, way to high.
Mines running very rich and only passes the mot if i tweak the map so it runs crap, at least i can put it back again.
If its not the cat or oxy sensors the you need to get the mapping sorted correctly.
Unplugging an injector wont work as the air content in the exhaust will be way to high and it will fail again.
Mines running very rich and only passes the mot if i tweak the map so it runs crap, at least i can put it back again.
If its not the cat or oxy sensors the you need to get the mapping sorted correctly.
Unplugging an injector wont work as the air content in the exhaust will be way to high and it will fail again.
R35 GTR
Was thinking of taking a trip to RS tuning on saturday....
Any chance you could take a look tomorrow afternoon? Do you have any lambda sensors in stock?
HC will be out the window if its miss-firing from cutting a cylinder....come on Dan, you got to think about these things.
The best thing to do if u dont have access to the map/ecu, is to fit an adjustable fuel pressure reg, and drop the fuel pressure till its on the verge of stalling. If HC is hi, the map may need to be tweaked e.g r****d ign to lower HC.
Volvo S60 T5
I'm fully booked till thursday next week , sorry mate.
172 ph1 ASBO SLAYER
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R35 GTR
[quote=LegoHead;3217313]
hmmmm....really?HC will be out the window if its miss-firing from cutting a cylinder....come on Dan, you got to think about these things.
The best thing to do if u dont have access to the map/ecu, is to fit an adjustable fuel pressure reg, and drop the fuel pressure till its on the verge of stalling. If HC is hi, the map may need to be tweaked e.g r****d ign to lower HC.
i passed on hc, on all 3 runs
R35 GTR
i dont believe it is the cat, as the numbers are very high.
perhaps you did, but if u unplug an injector like young Dan is suggesting, your HC will rise.
R35 GTR
----h means an oil level sensor fault has been detected but I can't help with the MOT sorry
That was probably because i was parked on a hill and oil was low as I got a warning flashed up about the oil.
Its only the length of the cable thats different there.
IIRC mine passed on HC aswell, but it was over a year ago mind!
oh, must be different to a mk1 172 as mine would plug into both either way round!
R35 GTR
ok guys, changed the post cat sensor back to the original one i had on and changed the pre cat sensor for a brand new one, but still seems to be running crap idle, worse even. But seems ok once warmed up.
The lambda sensor i took off was coated quite badly in carbon.
Maybe emissions are ok now, but wont find out till monday.
I also disconnected each ignition lead at a time, and each resulted in worse running and had good sparks to the plenum, so guessing coil pack is fine, and each spark plug is working?
I disconnected coolant sensor and seemed to be slightly different, but cant say for sure.
Any other ideas?
The lambda sensor i took off was coated quite badly in carbon.
Maybe emissions are ok now, but wont find out till monday.
I also disconnected each ignition lead at a time, and each resulted in worse running and had good sparks to the plenum, so guessing coil pack is fine, and each spark plug is working?
I disconnected coolant sensor and seemed to be slightly different, but cant say for sure.
Any other ideas?
may just be that the cat wont bring the emissions down enough, or go to bb and get them to sort out their f**k up on the mapping.
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