looking for some ideas as to why my car failed its mot on co level being 0.857 on fast idle and 0.58 on normal idle. my car is a cupra 280 with apr stage 2 with apr cast downpipe with 400 cell sports cat the rest of the exhaust is stock minus the resonator and centre box removed .when I drove there I never really gave it a good blast to get it hot I hope that's all it needs for the retest am I missing something here any ideas I would appreciate as always .
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mot fail
- Thread starter rozer1974
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Deleted member 103408
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Do you have access to OBD11 or VCDS, There is a section called readiness
Monitoring status since erasing DTC memory
Number of emission relevant DTC memory entries
Malfunction indicator lamp
Monitoring of ignition misfires
Monitoring of fuel system
Monitoring of entire system
Catalytic converter monitoring
Monitoring of catalytic converter at operating temperature
Monitoring of tank ventilation system
Monitoring of Secondary Air Injection (AIR) System
Monitoring of oxygen sensor
Monitoring of oxygen sensor heater
Monitoring of EGR and camshaft adjustment
Read more: http://forum.obdeleven.com/thread/3262/control-unit-setup#ixzz5HIipXefu
Readiness is a group of "parameters" (usually 8 x binary Bits) in the engine module which indicate the health of the car's emission systems. A state of 0 means "fail" and 1 means "passed". Whenever you bulk clear DTCs, ALL 8 x bits are set to the "fail" state - if your car doesn't have all 8 x emission test capabilities, those Bits will automatically be reset to 1.
Using these hopefully you can test to see if warming up the cat makes any difference.
Monitoring status since erasing DTC memory
Number of emission relevant DTC memory entries
Malfunction indicator lamp
Monitoring of ignition misfires
Monitoring of fuel system
Monitoring of entire system
Catalytic converter monitoring
Monitoring of catalytic converter at operating temperature
Monitoring of tank ventilation system
Monitoring of Secondary Air Injection (AIR) System
Monitoring of oxygen sensor
Monitoring of oxygen sensor heater
Monitoring of EGR and camshaft adjustment
Read more: http://forum.obdeleven.com/thread/3262/control-unit-setup#ixzz5HIipXefu
Readiness is a group of "parameters" (usually 8 x binary Bits) in the engine module which indicate the health of the car's emission systems. A state of 0 means "fail" and 1 means "passed". Whenever you bulk clear DTCs, ALL 8 x bits are set to the "fail" state - if your car doesn't have all 8 x emission test capabilities, those Bits will automatically be reset to 1.
Using these hopefully you can test to see if warming up the cat makes any difference.
I've not got any experience of that set up but the sports cat I've had in the past have been trouble. Remap and silencer delete no problems
I only have carista so am limited to what I can do lambda and hc came back fine it was just co but thanks for the insight oldboy I have spoke to awesome gti with whom I got my downpipe from and apr software they said they have never heard or had anyone with a downpipe from apr with apr stage fail an mot . would have to be me.
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I have no knowledge on this subject but based on what i have just read:
1/ Have you replaced your spark plugs I have seen some people fail as they are not working properly.
2/ Also I found this on on another site, the emission failure sheet, it will show you a working range which each measured level works within. I.E.
Lambda ideally 1 or within 0.97 to 1.03 lower the figure makes vehicle richer (more fuel)
O2 (oxygen level) the Lambda sensor regulates the fuel level & if the exhaust system has the smallest of leaks it will introduce oxygen in-between the O2 sensor & the tail pipe where the measurements are taken.
CO if over the limit indicates that CAT is not working correctly, maybe because engine is incorrectly fuelled or emissions test not carried before CAT is preconditioned/ engine HOT
HC if over the max level indicates Cat not able to filter hydro-carbons, maybe a simple as coolant temp sensor, if management system thinks the engine is cold it will inject more fuel in, (like pulling the choke out in old cars)
When a vehicle is tested a emission sheet should be attached to the pass or fail. A copy is held at the test station.
Have a look at the results & go from there, it tells a story.
1/ Have you replaced your spark plugs I have seen some people fail as they are not working properly.
2/ Also I found this on on another site, the emission failure sheet, it will show you a working range which each measured level works within. I.E.
Lambda ideally 1 or within 0.97 to 1.03 lower the figure makes vehicle richer (more fuel)
O2 (oxygen level) the Lambda sensor regulates the fuel level & if the exhaust system has the smallest of leaks it will introduce oxygen in-between the O2 sensor & the tail pipe where the measurements are taken.
CO if over the limit indicates that CAT is not working correctly, maybe because engine is incorrectly fuelled or emissions test not carried before CAT is preconditioned/ engine HOT
HC if over the max level indicates Cat not able to filter hydro-carbons, maybe a simple as coolant temp sensor, if management system thinks the engine is cold it will inject more fuel in, (like pulling the choke out in old cars)
When a vehicle is tested a emission sheet should be attached to the pass or fail. A copy is held at the test station.
Have a look at the results & go from there, it tells a story.
2 weeks ago fitted rs7 plugs I also have brand new rs3 coil packs too.
lambda fast idle= 1.010 pass
lambda second fast idle= 0.995 pass
hc fast idle = 111 pass
hc second fast idle =87 pass
co natural idle =0.580 fail
co fast idle = 0.857 fail
co second fast idle =0.951 fail
I wonder if a failing pcv could cause this problem when I take oil cap off when running the suction is very strong car also runs like crap too idle changes dramatically I wonder if this is normal on the mqb platform from what I am reading this would indicate a failing pcv on a golf mk6 gti maybe someone with a cupra 280 etc could see how much suction there is when removing oil cap when running because its very strong ???
lambda fast idle= 1.010 pass
lambda second fast idle= 0.995 pass
hc fast idle = 111 pass
hc second fast idle =87 pass
co natural idle =0.580 fail
co fast idle = 0.857 fail
co second fast idle =0.951 fail
I wonder if a failing pcv could cause this problem when I take oil cap off when running the suction is very strong car also runs like crap too idle changes dramatically I wonder if this is normal on the mqb platform from what I am reading this would indicate a failing pcv on a golf mk6 gti maybe someone with a cupra 280 etc could see how much suction there is when removing oil cap when running because its very strong ???
the new law has implemented stricter levels for diesel's and dpf but not petrol cars from reading. yes I still have the car and 10 days before retest they have classed it as a major defect am kicking myself for not really getting her red hot before test now i am unsure even if I do that shes going to pass. really considering fitting the standard downpipe back on but unsure how it plays out with the software being stage 2. I am also pissed with apr too .tested the car for any faults last night not one wtf .
Deleted member 103408
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On the revo map you can have a switch that allows you to roll back to stock mode, does APR Offer that.
Lots of comments on the web about getting it hot first and or telling testing station to make sure engine is at proper heat before starting test.
check out this little video of my 280 with engine on idle and oil cap off
Lots of comments on the web about getting it hot first and or telling testing station to make sure engine is at proper heat before starting test.
check out this little video of my 280 with engine on idle and oil cap off
when you took of the cap was there a lot of suction on the cap mine was really sucking down the cap with force from reading they say put a sticky note over the cap and if it buckles it its normal mine would suck about 7 off them right in. the
PCV system which allows 'air' out but not back in (one way check valve) and dumps it back into the intake manifold to burn off (on cars that need to meet emissions laws, otherwise it goes out the exhaust). This 'air' is blow-by from combustion, oil vapor, etc from inside the crankcase that is pressurized by the pistons moving up and down. so a bad pcv is going to be dumping more co out of exhaust.
PCV system which allows 'air' out but not back in (one way check valve) and dumps it back into the intake manifold to burn off (on cars that need to meet emissions laws, otherwise it goes out the exhaust). This 'air' is blow-by from combustion, oil vapor, etc from inside the crankcase that is pressurized by the pistons moving up and down. so a bad pcv is going to be dumping more co out of exhaust.
am not sure about apr roll back switch but must admit the would be very handy. been thinking with the apr stage 2 and this crackle map pops and bangs if that had the co level higher it was in cupra mode too should I put it in eco mode or maybe comfort so it would not do the impulse bangs ???
Deleted member 103408
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Deleted member 103408
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as no other apr owners have issues i would suggest put it in comfort mode and get it hot. get the garage to check pcv valve and look for any breaks in exhaust
Deleted member 103408
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all sorted now I changed the oil separator pcv there is an updated version out part 06k103495bm got from tps got the car very hot before going in and turned off the impulse mode and she passed. since changing the pcv to the improved one car has been running very good motor feels strong very strong my pcv was bad its not dumping any fuel into exhaust now.
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