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Topic: mot failure (emissions) (Read 1048 times) |
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frank.a
Newbie
97 scorpio 2.0 16v
 
Posts: 32
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mot failure (emissions)
« on: Aug 20th, 2008, 6:34pm » |
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my 97 2000 16v failed its mot today on emissions.
can anyone point me in the right direction of what to
do next please . Frank
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: mot failure (emissions)
« Reply #1 on: Aug 20th, 2008, 7:11pm » |
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Hello Frank.
Some more info would help mate, take a look at the test sheet and post the levels of the CO, HC etc.
Most common thing would be lambda sensors but there's a thousand things which could cause high emissions, if you just start replacing stuff on chance basis it'll get expensive for you.
Any chance of getting the car OBD scanned? Whereabouts are you in the UK?
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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frank.a
Newbie
97 scorpio 2.0 16v
Posts: 32
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Re: mot failure (emissions)
« Reply #2 on: Aug 20th, 2008, 7:56pm » |
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Thanks Bruce.
fast idle test
co 0.362 fail max limit 0.300
second fast idle test
co 0.372 fail max limit 0.300
those are only fails on the sheet . hope this helps ?
Frank
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: mot failure (emissions)
« Reply #3 on: Aug 20th, 2008, 8:55pm » |
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Hello Frank. Check your PMs, if you can post the result for hydrocarbons (HC) and lambda it will give the guys more idea what might be wrong.
Would happily do you an OBD scan but I'm miles from you in Essex. Getting it scanned would help find out what's wrong, could be something simple like coolant temp sensor, worn lambda sensor etc.
Hope this helps.
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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frank.a
Newbie
97 scorpio 2.0 16v
Posts: 32
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Re: mot failure (emissions)
« Reply #4 on: Aug 20th, 2008, 9:13pm » |
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thank bruce sorry for messing you about with pms 
fast idle test
hc 54 pass max limit 200
lambda 0.999 pass max limit 1.090
second fast idle test
hc 50 pass max limit 200
lambda 0.998 pass max limit 1.090
im afraid this means nothing to me ! 
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kev2scorps
Newbie
Posts: 27
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Re: mot failure (emissions)
« Reply #5 on: Aug 20th, 2008, 9:21pm » |
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Hi,
I had similar figures on my 2L 16V a couple of years ago. Ended up having to replace the catalytic converter.
Kev.
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2L 16V, 2.3 GHIA SALOONS,2L 8V GHIA EST 2L GRANNIE
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: mot failure (emissions)
« Reply #6 on: Aug 21st, 2008, 2:34am » |
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Have you tried injector/fuel system cleaner ?....It may help  .....Put it in the tank a week before the test so it can all run through
Also, on the way to the test, take it for a decent drive & if you can, give it a bit of welly on the local arterial road to really warm the engine up. A nice hot engine has lower emissions than a cold engine
Also, replace the air filter if it's dirty
Hope this helps
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martin_rowe
Full Member
I love YaBB 1G - SP1!
Posts: 879
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Re: mot failure (emissions)
« Reply #7 on: Aug 21st, 2008, 8:35am » |
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emissions are good, looks like cat had not 'lit up' or cat is in poor condition, hard fast road test befor re check (70mph in 3rd gear if poss) got to get the cat purged & up to temp.
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frank.a
Newbie
97 scorpio 2.0 16v
Posts: 32
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Re: mot failure (emissions)
« Reply #8 on: Aug 21st, 2008, 2:36pm » |
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thanks guys.
i did put a bottle of wynns clean burn emissions reducer
in the tank but it was only 2 days before the test.
i also had had the car on the motorway just before the test.
any idea of the prices for a cat (if i should need one ?)
cheers.
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: mot failure (emissions)
« Reply #9 on: Aug 23rd, 2008, 6:56pm » |
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Hello Frank. I know a few people who've used cats direct but haven't used them myself, just mentioning.
If it was mine I'd probably also change the lambda sensor(s) while I was doing the cat just in case but it depends how much you want to spend. Changed the lambda on the Mondeo because it was getting a bit slow and it gained me about 6mpg.
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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carmow
Junior Member
Converted !
Posts: 55
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Re: mot failure (emissions)
« Reply #10 on: Aug 24th, 2008, 11:14am » |
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this might help.. Jan this year my 2.3 failed in a very similar way to yours, I took it back 3 times having heated the engine, added all manner of cleaners etc and was just .02 out but they still wouldn't pass it. I finnally took it to an independant Ford agent in desperation and although the test fee was double the car passed - what he told me was, that with ALL electrical items on (lights, heater, radio, etc etc ) the engine works harder and thus burns cleaner lowering the emissions, how well do you know your tester? Ask if he can try it and see what happens!
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2.3 ultima auto saloon
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mr._floppy
Junior Member
Posts: 100
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Re: mot failure (emissions)
« Reply #11 on: Aug 25th, 2008, 12:18am » |
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As for warming up the engine for emissions testing. I believe the official line for MOT testers is to let the car idle till the radiator fans kick in.
Which, to me, is a reasonable indication that the engine is at operating temp.
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martin_rowe
Full Member
I love YaBB 1G - SP1!
Posts: 879
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Re: mot failure (emissions)
« Reply #12 on: Aug 26th, 2008, 9:18am » |
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that just means the coolant is up to temp, the 'cat' may take considerably longer, in fact it may be almost impossable to get a poisoned or contaminated cat up to the correct temp with out a hard road test, an emission reading of Llambda 1.00 mens the emissions are correct, so if Llambda is 1.00 & CO is over 0.3% it usually means all is ok, but indicates a cat fault, either u/s, contaminated or not up to temp.
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mr._floppy
Junior Member
Posts: 100
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Re: mot failure (emissions)
« Reply #13 on: Aug 26th, 2008, 6:45pm » |
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<<<< in fact it may be almost impossable to get a poisoned or contaminated cat up to the correct temp with out a hard road test >>>>
Which is a good enough reason to fail it then I'm afraid.
The Cat(s) should be fully operational at a reasonable time after start up and shouldn't really require a 30 min. thrash down the M6 at 100 mph to get it "heated up". 
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carmow
Junior Member
Converted !
Posts: 55
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Re: mot failure (emissions)
« Reply #14 on: Aug 29th, 2008, 9:31pm » |
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I agree in principle with Mr Floppy, however, we are realists... our cars are available in some quarters for peanuts and to add the cost of a cat to the equation far too many Good cars would be scrapped. Lets keep them going any which way we can !
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2.3 ultima auto saloon
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martin_rowe
Full Member
I love YaBB 1G - SP1!
Posts: 879
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Re: mot failure (emissions)
« Reply #15 on: Aug 30th, 2008, 8:31am » |
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Normally it takes a cat approx 2 miles to 'lite up', they will seldom get hot enough left ticking over, in fact will may cool don enough to stop working. even a new one. any vehicle that only travels short distances / low load will eventually poison the cat, hence a good hard road test.
correct when carrying out the emission test (bet test) it is acceptable to do it with a hot radiator (cooling fan cut in) but that deffinatly dose'nt mean the cat is hot enough, in real life many cats are replaced with out being faulty, or correct diagnosis carried out, check out how many cats some of the fast fits fit. but what do I know.
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frank.a
Newbie
97 scorpio 2.0 16v
Posts: 32
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Re: mot failure (emissions)
« Reply #16 on: Aug 30th, 2008, 12:47pm » |
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Thanks for all the replies guys.
had a new cat fitted and it sailed through the
emissions test 0.002 CO
The old cat was broken to bits inside !
Once again thanks Frank
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