Hi all,My car has been sat in my garage for about 6 weeks as the mot ran out.It has been started regularly and idling for a while.When i took it for mot the emissions were 11% co and hc extremely high.I have been posing questions on what it could be and have spent hours fiddling and tinkering unplugging things,plugging them back in .Changed spark plugs,cleaned contacts on things etc.All this was to no avail as when i put the probe up the exhaust i kept getting 5% and more on the co.As a last resort and fed up to the back teeth i decided to risk taking it out and gave it a good thrashing up the road ,round back country lanes and revved the hell out of it(**** or bust).I just got it back home put the co meter up the exhaust and now reading 1% co.Could it just have been because the car has not been run on the road for so long that the emissions were so high.Just hope they remain low for the mot.Thanks for all your assistance and keep up the good replys you give.The advice is really appreciated.Thankyou Alan.
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Emissions sky high (HELP!)
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The engine has to be up to working temperature for the emissions to be correct.www.maestroturbo.org.uk - The Tickford Maestro Turbo Register
www.rover200.org.uk - The Rover 200/400 (R8) Owners Club
www.roverdiesel.co.uk - My Rover Diesel Site
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Should do yes so long as it isn't a diesel!.
If could be down to plug fouling or perhaps a HT lead breaking down giving a slight misfire. These then dry out as the engine spends time at temperature and suddenly the problem goes away. The K series was a sod for doing that.www.maestroturbo.org.uk - The Tickford Maestro Turbo Register
www.rover200.org.uk - The Rover 200/400 (R8) Owners Club
www.roverdiesel.co.uk - My Rover Diesel Site
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Took car a run round tonight ,tested emissions and guess what,SKY HIGH again.Something is intermitently causing engine to run rich.Have put new plugs in,new ignition leads,has been reading around 1% co this last few days.MOT at 11.00am in morning,looks like failure again.
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Make sure the connectors for the coolant temp sensor is good, clean and tight and you may be lucky!
Make sure it is really hot for the test too.www.maestroturbo.org.uk - The Tickford Maestro Turbo Register
www.rover200.org.uk - The Rover 200/400 (R8) Owners Club
www.roverdiesel.co.uk - My Rover Diesel Site
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Originally posted by E_T_V View PostMake sure the connectors for the coolant temp sensor is good, clean and tight and you may be lucky!
Make sure it is really hot for the test too.
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If its misfireing then nothing you do to the CTS is going to help.
You need to fix the misfire first. I presume plugs, rotor arm and HT leads have been swapped for new ones (or at least known good ones).www.maestroturbo.org.uk - The Tickford Maestro Turbo Register
www.rover200.org.uk - The Rover 200/400 (R8) Owners Club
www.roverdiesel.co.uk - My Rover Diesel Site
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Originally posted by E_T_V View PostIf its misfireing then nothing you do to the CTS is going to help.
You need to fix the misfire first. I presume plugs, rotor arm and HT leads have been swapped for new ones (or at least known good ones).
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I just got my CO emissions down from 4.5% (fail) to 1.38% (pass) by doing the following to my 90K miles EFI.
(a) Put engine flush in the petrol (tank 1/3 full) and use it all up on motorway driving at 70mph till tank empty light comes on.
(b) Refill tank with premium grade unleaded.
(c) Silicone grease on inside of petrol filler cap rubber seal to create air tight seal.
(d) Replace engine oil.
(e) Replace and reconnect air flow sensor inside filter housing (it had become electrically detached from filter housing but also looked in poor shape)
(f) Clean ECU multiplug with electrical switch cleaner.
I don't know the specific issue but whatever I did it obviously worked.LPG Converted Montego 2.0gsi 1991 - are there any others?
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Originally posted by fbm777 View PostI just got my CO emissions down from 4.5% (fail) to 1.38% (pass) by doing the following to my 90K miles EFI.
(a) Put engine flush in the petrol (tank 1/3 full) and use it all up on motorway driving at 70mph till tank empty light comes on.
(b) Refill tank with premium grade unleaded.
(c) Silicone grease on inside of petrol filler cap rubber seal to create air tight seal.
(d) Replace engine oil.
(e) Replace and reconnect air flow sensor inside filter housing (it had become electrically detached from filter housing but also looked in poor shape)
(f) Clean ECU multiplug with electrical switch cleaner.
I don't know the specific issue but whatever I did it obviously worked.1958 Ford Consul Convertible. I love this car
1965 Ford Zodiac Executive. Fab cruiser being restored
1997 Jaguar Xk8 Convertible. Such a fab car
2003 MGZT V8. BRG and new project
2004 MGZT cdti. Great workhorse
2004 MGZT V8. Black I love this car
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Originally posted by Jeff Turbo View Post
Air flow sensor would cause that
LPG Converted Montego 2.0gsi 1991 - are there any others?
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