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M.O.T failure
http://classiccamaroclub.mfatw.com/viewtopic.php?f=6&t=3351		 Page 1 of 1
Author:  SS Camaro UK [Mon Aug 19, 2013 5:26 pm ]
Post subject:  M.O.T failure
As the title says, my car failed its MOT today :( There were 2 issues, the first is the lambda reading was too high and the second was the passenger side parking brake was insufficient.

I fitted an SLP Loudmouth earlier this year, does anyone think the Loudmouth has affected emissions or has an o2 sensor gone bad, I'm open to other suggestions as well?

As for the parking brake, I had to remove the brake disc to put in a new wheel stud, I didn't touch the parking brake but does removing the disc mean it should need attention?

Any assistance would be most appreciated.

Thanks in advance.
Author:  sportsroof [Mon Aug 19, 2013 7:02 pm ]
Post subject:  Re: M.O.T failure
MOTs 'R' me so I'll try to help.
High Lambda usually means a leak in the exhaust, check it thoroughly. Small leaks are usually not a problem but larger ones will.
Weak disc brake effort is often a caliper issue, parts siezed up like slider pins, pads in the carrier, cable etc. Sorry but you'll just have to pull it apart and look for trouble and check it's all working as it should. Does your park brake operate the caliper or a drum inside the disc, I think it does but just remind me.
Sometimes if the effort is just a bit low, driving the car and hammering the brakes can help quite a bit with the heat. HTH
Cheers, Martin
Author:  chevy-stu [Mon Aug 19, 2013 8:37 pm ]
Post subject:  Re: M.O.T failure
I think the 4th gens have a brake shoe for handbrake inside the disc, so it's possible you may have dislodged something when the disc came off. No idea if they're supposed to be self adjusting or not.
Author:  SS Camaro UK [Mon Aug 19, 2013 9:17 pm ]
Post subject:  Re: M.O.T failure
It's a drum inside disc, as chevy-stu says.

Could a leak be anywhere along the exhaust to cause this? The only places I can think of at the moment are the joins at each section of the Loudmouth.

What's the best way of plugging those gaps?
Author:  Z28DUNC [Tue Aug 20, 2013 11:49 am ]
Post subject:  Re: M.O.T failure
Have you used this garage before? Sometimes they can be a bit over the top on yanks. Handbrakes on these are crap anyway.
Author:  SS Camaro UK [Tue Aug 20, 2013 5:04 pm ]
Post subject:  Re: M.O.T failure
It's my regular garage, I've been using them for years.

I did find online how to adjust the parking brake, so I'll give that a go.
Author:  maudyZ28 [Wed Aug 21, 2013 12:44 pm ]
Post subject:  Re: M.O.T failure
If the loudmouth has 2 exits in the exhaust did the tester block one up. Must always be done as only a single pipe into exhaust. But check for leaks too. If you have access to a data logger that would tell you how O2 sensors are behaving. Not sure if the ebay specials will do it, i've got the full tuning suite so keep trak of everything that way.

The parking brake is easy. Jack up and get caliper and disc off (let the handbrake off and chock the front wheels) Check the shoe is central. Then at the bottom there is a cylinder with a nurled ring bit. This moved to open up the shoe or close it. Just try adjusting that a bit and then it should be a bit tighter, dont go overboard or you wont get the disc back on :)

Pull the handbrake up and down a few times at it has a sell adjusting mech in it too. As DUNC said, they are crap handbrakes and i've driven about before not knowing mine is on :O
Author:  SS Camaro UK [Fri Aug 23, 2013 7:45 pm ]
Post subject:  Re: M.O.T failure
Passed MOT today. :D

Tester didn't put probe in past the tail pipe and into main exhaust last time, this time he did and got an almost perfect lambda reading.
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