Am a newbie and still finding out how the site works re the appropriate site for a particular topic, etc. so here goes again.
I have a May 1994 reg.peugeot talbot /J5 (1971 cc )petrol motorhome (highlander I GT -whatever that means). The engine is a 170 B. Has done about 80,000 miles. Am failing the lambda,CO and HC tests at high idle. In the last three tries over the past two weeks , one or two of them failed and the remaining one or two would be up. The same item does not fail all the time.Everything else is ok.
Having read the operators manual and supporting documentation for the MOT re the UK regulations ,the above engine would fly through mainly because the engine was not fitted out with any advanced emissions control systems when being manufactured. Eg, catalytic convertor. Age is also a consideration. For example ,an engine first used up to 31/August / 2002 could pass the MOT test for CO and HC at low idle especially if it never had a cat fitted. It is not tested at high idle.
On page 15 of the LCV (light commercial vehicle) testers manual ( for the Irish test ) -an RSA production- point 3 states
:-
" For vehicles first registered on or after 1st day of January 1994, a further check of the carbon monoxide content of the exhaust gasses is required at an engine speed of 2500 rpm or at a speed
specified by the engine manufacturer. The air/fuel ratio (Lambda) value should also be checked at this engine speed"
Notes on the same page state that:-
"Where it can be established that the vehicle manufacturer's recommendations on exhaust emissions are higher than those listed in the reasons for failure, then the manufacturer's figure should be the criteria used when deciding whether or not a vehicle passes"
The official "Peugeot J5 Factory Workshop Manual" for my type engine specifies a speed of 800+- 50 rpm and a CO% of 1% to 2%. There is absolutely no mention of any other speed or any other advanced emissions control mechanism apart from the carburettor.
I wonder if the Irish manual meant the same processes as it's UK counterpart , in principal, except that the UK one in spelt out in much greater detail.
The LCV tester I'm dealing with has never come across this situation but will accept a letter re the page 15 Manu specs. And that is the core of my problem ie getting that letter as the original manufacturer has been taken over a few times, infro not on computer databases , company HQ changed, etc.
I would dearly love to hear from anyone out there who has any experience of the above for ANY engine re the Irish test,and especially if they got that letter. Here's hoping. This test hassle is taking the good out of something that my family and I should be enjoying.
As an aside , those UK MH owners do not know how lucky they are with their MOT -the 4 wheeled one not the two legged one this time. Also it would be that bit more informative if, in principal and where relevant ,all topics indicated the MH type and age, UK or Ireland based and specify test type ie MOT (UK) or CRW(Irl)
Suirview
I have a May 1994 reg.peugeot talbot /J5 (1971 cc )petrol motorhome (highlander I GT -whatever that means). The engine is a 170 B. Has done about 80,000 miles. Am failing the lambda,CO and HC tests at high idle. In the last three tries over the past two weeks , one or two of them failed and the remaining one or two would be up. The same item does not fail all the time.Everything else is ok.
Having read the operators manual and supporting documentation for the MOT re the UK regulations ,the above engine would fly through mainly because the engine was not fitted out with any advanced emissions control systems when being manufactured. Eg, catalytic convertor. Age is also a consideration. For example ,an engine first used up to 31/August / 2002 could pass the MOT test for CO and HC at low idle especially if it never had a cat fitted. It is not tested at high idle.
On page 15 of the LCV (light commercial vehicle) testers manual ( for the Irish test ) -an RSA production- point 3 states
:-
" For vehicles first registered on or after 1st day of January 1994, a further check of the carbon monoxide content of the exhaust gasses is required at an engine speed of 2500 rpm or at a speed
specified by the engine manufacturer. The air/fuel ratio (Lambda) value should also be checked at this engine speed"
Notes on the same page state that:-
"Where it can be established that the vehicle manufacturer's recommendations on exhaust emissions are higher than those listed in the reasons for failure, then the manufacturer's figure should be the criteria used when deciding whether or not a vehicle passes"
The official "Peugeot J5 Factory Workshop Manual" for my type engine specifies a speed of 800+- 50 rpm and a CO% of 1% to 2%. There is absolutely no mention of any other speed or any other advanced emissions control mechanism apart from the carburettor.
I wonder if the Irish manual meant the same processes as it's UK counterpart , in principal, except that the UK one in spelt out in much greater detail.
The LCV tester I'm dealing with has never come across this situation but will accept a letter re the page 15 Manu specs. And that is the core of my problem ie getting that letter as the original manufacturer has been taken over a few times, infro not on computer databases , company HQ changed, etc.
I would dearly love to hear from anyone out there who has any experience of the above for ANY engine re the Irish test,and especially if they got that letter. Here's hoping. This test hassle is taking the good out of something that my family and I should be enjoying.
As an aside , those UK MH owners do not know how lucky they are with their MOT -the 4 wheeled one not the two legged one this time. Also it would be that bit more informative if, in principal and where relevant ,all topics indicated the MH type and age, UK or Ireland based and specify test type ie MOT (UK) or CRW(Irl)
Suirview
