Bcs sports cat failed mot

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HEAVYD
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Bcs sports cat failed mot

Post by HEAVYD » Sun Dec 03, 2017 9:53 pm

Is it normal for such a large outlay, that my car cannot pass an mot with one of your sports cat fitted? I have had to pay to get it removed and have the original cat put back on the car to pass emissions, which it did with flying colours after the bcs was removed.
I guess you don’t always get what you pay for these days...

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Re: Bcs sports cat failed mot

Post by Blind Pugh » Sun Dec 03, 2017 9:59 pm

HeavyD

You are in minority - did you take the car out for an “Italian tune up” just prior to the MOT ?

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Re: Bcs sports cat failed mot

Post by HEAVYD » Sun Dec 03, 2017 10:03 pm

Yes, certainly did! The emission readings were ridiculous with the cat in. Just drove it normally to the garage with the oem cat on, the mechanic said the readings were in a different league. Gutted, as the car sounds nowhere near as good anymore, don’t want to pay out again for the same to happen again though. Should have just bought a de-cat....

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Re: Bcs sports cat failed mot

Post by Blind Pugh » Sun Dec 03, 2017 10:30 pm

HEAVYD wrote:
Sun Dec 03, 2017 10:03 pm
Yes, certainly did! The emission readings were ridiculous with the cat in. Just drove it normally to the garage with the oem cat on, the mechanic said the readings were in a different league. Gutted, as the car sounds nowhere near as good anymore, don’t want to pay out again for the same to happen again though. Should have just bought a de-cat....
Did your BCS DP have the spacer/elbow pre-installed on 2nd / lower O2 sensor port ?
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Re: Bcs sports cat failed mot

Post by HEAVYD » Sun Dec 03, 2017 10:32 pm

I’ve got a pwg. It passed last year with it on, but not this year. I’ll have a look tomorrow

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Re: Bcs sports cat failed mot

Post by HEAVYD » Tue Dec 05, 2017 8:19 pm

Hasn’t got the spacer

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Re: Bcs sports cat failed mot

Post by Blind Pugh » Wed Dec 06, 2017 7:02 am

HEAVYD wrote:
Tue Dec 05, 2017 8:19 pm
Hasn’t got the spacer
Fit one and I’d lay short odds yr car’s next mot, with BCS DP insitu, will be fine.

How many miles has yr BCS DP covered ?
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Re: Bcs sports cat failed mot

Post by andyjhatton » Wed Dec 06, 2017 7:08 am

The spacer is only there to help the car's own lambda probe deal with increased flow.

I can't see how they'd affect the exhaust as measured at the tailpipe by an external 4 gas analyser
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Re: Bcs sports cat failed mot

Post by sootyvrs » Wed Dec 06, 2017 10:43 am

Did you use the same not testing station as last time?

Could the second time around test was done using different equipment?

I had a BCS sports CAT on my previous M135 and was always a little concerned if it would pass mot as I've read of other cars with sports cat (not necessarily BCS or mlites) having issues.. I didn't keep it 3 years so will never know now..

One reason I'm not bothering with downpipe changes this time around regardless of the potential power and sound benefits

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Re: Bcs sports cat failed mot

Post by Blind Pugh » Wed Dec 06, 2017 11:09 am

sootyvrs wrote:
Wed Dec 06, 2017 10:43 am
Did you use the same not testing station as last time?

Could the second time around test was done using different equipment?

I had a BCS sports CAT on my previous M135 and was always a little concerned if it would pass mot as I've read of other cars with sports cat (not necessarily BCS or mlites) having issues.. I didn't keep it 3 years so will never know now..

One reason I'm not bothering with downpipe changes this time around regardless of the potential power and sound benefits

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Mine passed 2 mots with BCS 200cpi DP. Emissions were well in spec on 1st mot
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Re: Bcs sports cat failed mot

Post by sootyvrs » Wed Dec 06, 2017 12:00 pm

Blind Pugh wrote:
Wed Dec 06, 2017 11:09 am
Mine passed 2 mots with BCS 200cpi DP. Emissions were well in spec on 1st mot
How about the 2nd MOT BP as per OP?
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Re: Bcs sports cat failed mot

Post by Blind Pugh » Wed Dec 06, 2017 3:20 pm

sootyvrs wrote:
Wed Dec 06, 2017 12:00 pm
Blind Pugh wrote:
Wed Dec 06, 2017 11:09 am
Mine passed 2 mots with BCS 200cpi DP. Emissions were well in spec on 1st mot
How about the 2nd MOT BP as per OP?
Sooty - IDK detail of 2nd MOT as sold the car just before it was due but new owner confirmed car sailed thru mot wo any advisories. BP
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Re: Bcs sports cat failed mot

Post by HEAVYD » Wed Dec 06, 2017 5:34 pm

I took it to the same mot place. I was under the impression the spacer was for the lambda sensor putting a emissions fault on the dash. It has a JB4 fitted, so didn’t need the spacer.

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Re: Bcs sports cat failed mot

Post by Blind Pugh » Wed Dec 06, 2017 6:07 pm

HEAVYD wrote:
Wed Dec 06, 2017 5:34 pm
I took it to the same mot place. I was under the impression the spacer was for the lambda sensor putting a emissions fault on the dash. It has a JB4 fitted, so didn’t need the spacer.
HvyD

Correct re spacer.

Did you remove JB4 / set to map zero for mot ?

BP
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Re: Bcs sports cat failed mot

Post by HEAVYD » Wed Dec 06, 2017 6:59 pm

I had the jb4 in map 2, then map 4, then 0, all failed emissions

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