Harryjax Posted March 15, 2015 Posted March 15, 2015 Fitted a Invidia exhaust and Berks HFC's to my car about 8-9 months ago. Love the noise but now I have an issue getting it to pass an mot due to exhaust emissions. CO and HC both pass but the Lambda reading falls outside specified limits. CO= 0.03% Pass HF= 26 PPM Pass Fast idle = 1.096 Fail 2nd fast idle = 1.083 Fail Is this common when HFC's are fitted? How can I sort this without removing aftermarket system. Will replacing both lambda sensors fix this? No fault codes are being stored on ecu when I put the code reader on. Quote
Keyser Posted March 15, 2015 Posted March 15, 2015 Replacing the sensor's will make no difference AFAIK - its the test equipment that is giving the high reading. Yes common of HFC's - only advice is rag the car for a bit before the test - get here really hot the CAT's are more efficient when hot. If that fails PM me I have another solution 3 Quote
srad34 Posted March 15, 2015 Posted March 15, 2015 Replacing the sensor's will make no difference AFAIK - its the test equipment that is giving the high reading. Yes common of HFC's - only advice is rag the car for a bit before the test - get here really hot the CAT's are more efficient when hot. If that fails PM me I have another solution This ^^^^. Italian tune up for the win! Quote
Harryjax Posted March 15, 2015 Author Posted March 15, 2015 I took the car in after a long hard spin she was hot very hot. Still failed. Quote
RafsZed Posted March 16, 2015 Posted March 16, 2015 I thought having a Berks HFC fitted isn't a problem with MOT, I just had mine done with no problems or is it only a problem when fitted together with certain exhaust systems? Quote
Will370z Posted March 16, 2015 Posted March 16, 2015 Its a common issue that the HFCs cause problems with the MOT. Normally if run hot before the MOT and you have a friendly tester its not such a problem Quote
sipar69 Posted March 16, 2015 Posted March 16, 2015 I was told that the materials used inside Cobra HFCs mean that MOT fails should not be an issue....got another couple of years til I find out. Fingers crossed. Quote
ioneabee Posted March 16, 2015 Posted March 16, 2015 I have a friendly tester i mentioned it to him and he just said it WONT be a problem 1 Quote
Kaveney Posted March 26, 2015 Posted March 26, 2015 My car with Cobra HFC did not pass and were new but the car may not have been hot enough . Alan Quote
flyboy Posted March 26, 2015 Posted March 26, 2015 Mine passed with cheap ebay HFC and an invidia gemini --- once a tiny exhaust leak had been fixed from the mid flange. Check for even the smallest leak as this threw the Lambda and HC way out on mine. Quote
RobPhoboS Posted March 26, 2015 Posted March 26, 2015 Find a different place for MOT and always use those guys Quote
veilside z Posted March 26, 2015 Posted March 26, 2015 Its a great pain. The involvement to replace the decat with original cats every year. I have been lucky of recent times to find a friendly tester. Be cautious. Quote
sipar69 Posted March 26, 2015 Posted March 26, 2015 My car with Cobra HFC did not pass and were new but the car may not have been hot enough . Alan That's a bummer. Are you in a 370? Quote
Kaveney Posted March 27, 2015 Posted March 27, 2015 No a DE 350Z and I don't think the MOT place got them hot enough . Alan Quote
sipar69 Posted March 27, 2015 Posted March 27, 2015 Ok. Be interesting to see what happens when I'm due an MOT as I was definitely told they were MOT proof. Quote
jumping350 Posted March 27, 2015 Posted March 27, 2015 I replaced my decats with my original cats and it still failed my mate gave me something to shove in the petrol tank and drive it straight there and it passed straight away, think you can get it in halfords Quote
sipar69 Posted March 30, 2015 Posted March 30, 2015 I replaced my decats with my original cats and it still failed my mate gave me something to shove in the petrol tank and drive it straight there and it passed straight away, think you can get it in halfords Can you elaborate on what that 'something' was plse? Quote
jumping350 Posted March 30, 2015 Posted March 30, 2015 like this http://www.halfords.com/motoring-travel/engine-oils-fluids/fuel-oil-additives/wynns-clean-burn-emissions-reducer-325ml but i think there is better stuff than this Quote
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