Just failed MOT
10 March 2015, 06:19 PM
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Just failed MOT
On CO %vol
Fast idle
CO 1.235 Max limit 0.200
HC 56
Lambda 0.986
Second fast idle
CO 0.851 Max limit 0.200
HC 63
Lambda 0.997
Natural idle
CO 0.611 Max limit 0.300
Any suggestions?
Last edited by Cpt Jack Sparrow; 10 March 2015 at 06:53 PM .
10 March 2015, 06:30 PM
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Quote:
Originally Posted by
Cpt Jack Sparrow
On CO %vol
Fast idle
CO 1.235 Max limit 0.200
HC 56
Lambda 0.986
Second fast idle
CO 0.851 Max limit 0.200
HC 63
Lambda 0.997
Natural idle
CO 0.611 Max limit 0.300
Ant suggestions?
2.5 if I'm correct..............head gasket/piston ring failing
10 March 2015, 06:33 PM
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more details required
cat/sportscat/ no cat
standard ecu/mapped ecu/aftermarket ecu
10 March 2015, 06:38 PM
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Quote:
Originally Posted by
p1junkie
more details required
cat/sportscat/ no cat
standard ecu/mapped ecu/aftermarket ecu
all standard, all Cats present
only thing that is not, is the PO fitted a Japspeed cold air intake, however this has not caused an issue for the last two MOTs
10 March 2015, 06:38 PM
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Quote:
Originally Posted by
the shreksta
was expecting that reply... or " should have bought an STi"
10 March 2015, 06:50 PM
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10 March 2015, 06:52 PM
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Quote:
Originally Posted by
fat-thomas
Knackered lambda
That was my first reaction, but it been replaced in the last year and he said all the reading from the Lambda are spot on...
Last edited by Cpt Jack Sparrow; 10 March 2015 at 06:53 PM .
10 March 2015, 06:54 PM
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Quote:
Originally Posted by
Cpt Jack Sparrow
That was my first reaction, but it been replace recently and he said all the reading from the Lambda are spot on...
Just check it all,lambda,air filter clean,air leak somewhere even spark plugs but I doubt it would be that.
10 March 2015, 06:55 PM
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I assume it's a denso lambda and not a cheapo jobbie?
10 March 2015, 06:56 PM
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Quote:
Originally Posted by
fat-thomas
Just check it all,lambda,air filter clean,air leak somewhere even spark plugs but I doubt it would be that.
They are going to take it for the day and sort it tomorrow.
Plugs are 6 months old, air filter replaced last week.
so Lambda, leak will be prime suspects....
MAF ????
10 March 2015, 06:57 PM
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Quote:
Originally Posted by
fat-thomas
I assume it's a denso lambda and not a cheapo jobbie?
Yeah its a Denso, had a couple once...just like MAFS lol
10 March 2015, 06:58 PM
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If it was a non genuine lamb sensor, my money would be on that. They just don't last.
10 March 2015, 07:00 PM
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Grrrr bloody maf!!
Unlikely though I'd say
10 March 2015, 07:05 PM
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What was the oil temeprature? It "should" be measured for the MOT test (although can be bypassed).
Has it had an Italian tune up immediately before the test? Or was it just left idling to get up to temeprature?
The latter will gaurantee a fail on a scoob.
10 March 2015, 07:34 PM
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Quote:
Originally Posted by
ALi-B
What was the oil temeprature? It "should" be measured for the MOT test (although can be bypassed).
Has it had an Italian tune up immediately before the test? Or was it just left idling to get up to temeprature?
The latter will gaurantee a fail on a scoob.
It had a 50 mile run before the test, but then had to wait 1/2 hour before emmisions test so had cooled down alot
10 March 2015, 08:43 PM
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pre turbo vac leak. I'll wager a shiney penny.
10 March 2015, 10:11 PM
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Quote:
Originally Posted by
Cpt Jack Sparrow
It had a 50 mile run before the test, but then had to wait 1/2 hour before emmisions test so had cooled down alot
As the Lambda reading is good, I'd look at possible cat failure. However first I'd try some fresh VPower followed by a damn good thrashing with emissions tested immediately after, without standing for half an hour.
10 March 2015, 10:17 PM
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Quote:
Originally Posted by
brendy76
pre turbo vac leak. I'll wager a shiney penny.
Sounds interesting, where would I look for pre turbo leaks
10 March 2015, 11:06 PM
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follow the turbo turbo intake pipe - look for all the vac lines coming off it and check to make sure they are connected on both ends
10 March 2015, 11:43 PM
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Cat isn't hot enough, Noticed on the 2nd fast idle it had come down a touch. cats getting hotter. the cat is likely to be a little less efficient over the years, or it just stood to long
11 March 2015, 09:02 AM
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I've put a car through the mot before with a barely warmed cat, 95 fuel etc. that on its own doesn't usually lead to the car being quite a bit over the thresholds. To fail emissions, there is usually something more physical like a split vac pipe/loose from solenoid etc or in the occasional case a dud sensor.
11 March 2015, 09:11 AM
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Quote:
Originally Posted by
brendy76
I've put a car through the mot before with a barely warmed cat, 95 fuel etc. that on its own doesn't usually lead to the car being quite a bit over the thresholds. To fail emissions, there is usually something more physical like a split vac pipe/loose from solenoid etc or in the occasional case a dud sensor.
With most cars, especially newer ones they easily pass MOT emissions with a cold engine. Old/ageing scoobs on the other hand its s different story. Especially if it's had one of the two cats removed or has a non-genuine cat (which definetly have shorter lifespans). Which is very often case as these cars have often been through at least several owners and the current one may not know what's been messed with in the past.
11 March 2015, 09:56 AM
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Well its just gone back in to see what they can do.. find.
fingers crossed
11 March 2015, 10:59 AM
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Just out of curiosity were your 2 previous MoTs done at the same place/same tester? I know it shouldn't make any difference, but you never know
11 March 2015, 11:15 AM
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Quote:
Originally Posted by
Blue by You
Just out of curiosity were your 2 previous MoTs done at the same place/same tester? I know it shouldn't make any difference, but you never know
Yep, always done at Orbit in Rushden...
Anyhow, just had a call
It's Passed
Off to pick it up now
11 March 2015, 11:41 AM
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Glad to hear that Paul. Make sure you ask them what they had to do to get a pass.
11 March 2015, 11:49 AM
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Blue by You
Glad to hear that Paul. Make sure you ask them what they had to do to get a pass.
yeah aside from charging you a small fee no doubt!
11 March 2015, 12:12 PM
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Quote:
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Blue by You
Glad to hear that Paul. Make sure you ask them what they had to do to get a pass.
Heat in the CAT, took it for a run first
11 March 2015, 12:13 PM
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Quote:
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bludgod
yeah aside from charging you a small fee no doubt!
Nope
11 March 2015, 12:16 PM
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glad to hear it! Far too many hoods out there trying to get a double dip in your pockets for horsing you car around the countryside