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Shapfell · 7th January 2020, 14:26

At the end of my tether today. Failed again, still the same, 12% or thereabouts CO.
So, going through the list of checked/replaced;
Air filter
Injectors
Inlet manifold gaskets (alloy type fitted)
Fuel rail damper (although I haven't a clue why its fitted to a 1.8 n/a as there is no return line)
Manicat
Both O2 sensors
Plugs
Coil packs
MAP
T4'd several times with nothing obvious (thanks Trikey!)
Compression test ok @ approx 13b
No overheating
No coolant loss
Oil 'clean' (ok, its mucky but uncontaminated).

So, tried a CO2 test on the coolant - failed. Oh FFS! I had done this before but it showed nothing and passed.
Now trying to decide what to do.... would an N series drop in there (MGTF, not MG6 variant)?

7th January 2020, 14:26	#30
Shapfell Loves to post Rover 75 Conn SE saloon / MG ZTT cdti auto Join Date: Jul 2011 Location: Lowestoft Posts: 497 Thanks: 10 Thanked 33 Times in 26 Posts	At the end of my tether today. Failed again, still the same, 12% or thereabouts CO. So, going through the list of checked/replaced; Air filter Injectors Inlet manifold gaskets (alloy type fitted) Fuel rail damper (although I haven't a clue why its fitted to a 1.8 n/a as there is no return line) Manicat Both O2 sensors Plugs Coil packs MAP T4'd several times with nothing obvious (thanks Trikey!) Compression test ok @ approx 13b No overheating No coolant loss Oil 'clean' (ok, its mucky but uncontaminated). So, tried a CO2 test on the coolant - failed. Oh FFS! I had done this before but it showed nothing and passed. Now trying to decide what to do.... would an N series drop in there (MGTF, not MG6 variant)? __________________ Oh well, it's only money...... 2004 Conn SE 1.8 Work so far:- Gerry T, Rad Fan Resistor, Handbrake Compensator, Bonnet Catch Block, Leather Handbrake gaiter, Journey Camera, Sean's DD Unit with Freeview!, Towbar, Rear Sunblind, Smiley!, Headlamp Protectors, Alloy Intake, R75 Brolly, Puddle lights, reversing camera. 2004 Connie CDTi Tourer; replacement for the ZTT.