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philm · 27th June 2017, 08:53

You haven't actually said why on the emissions it has failed, could be for either of the reasons you have stated cat/lambda if the HC,s are high could even be a cylinder head valve not seating correctly not a very common problem but it is possible.it could also be any of the ignition components or on the fuel inlet side have you replaced the air filter if not worth a try to lean the system out a little,ask the tester if he can try the test at differing rpm limits and check results.
good luck anyway.

27th June 2017, 08:53	#4
philm Loves to post rover 75 tourer Join Date: Jan 2017 Location: HEREFORD Posts: 269 Thanks: 7 Thanked 69 Times in 56 Posts	You haven't actually said why on the emissions it has failed, could be for either of the reasons you have stated cat/lambda if the HC,s are high could even be a cylinder head valve not seating correctly not a very common problem but it is possible.it could also be any of the ignition components or on the fuel inlet side have you replaced the air filter if not worth a try to lean the system out a little,ask the tester if he can try the test at differing rpm limits and check results. good luck anyway. Last edited by philm; 27th June 2017 at 09:39..