Another failed MOT!

[mrpbailey]

Car failed MOT today on emissions and near side hand-brake 'recording little or no effort'.
Emissions failed both fast idle tests on lambda readings, CO & HC levels were fine.

Lambda limits 0.970-1.030
1st fast idle = 1.146
2nd fast idle = 1.144

Is this just the lambda sensors? Or could it be exhaust / manifold problems?? Car had not been out the garage for previous 3 months but gave it a good couple of hours run before the test.

Also front tyres are worn on the inside edge a lot more than rest of the tyre, plan on getting the laser alignment done for this, any other advice?

Thanks

Paul

[mrpbailey]

anybody???

[YellowShed]

mrpbailey said:

Emissions failed both fast idle tests on lambda readings, CO & HC levels were fine.

Lambda limits 0.970-1.030
1st fast idle = 1.146
2nd fast idle = 1.144

Is this just the lambda sensors? Or could it be exhaust / manifold problems??

Paul

Could be either/both. That much air is a lot of lean running. Quite likely to be both dead lambda sensors and cracked manifolds.

YellowShed

[joolski]

mrpbailey said:

Car failed MOT today on emissions and near side hand-brake 'recording little or no effort'.
Emissions failed both fast idle tests on lambda readings, CO & HC levels were fine.

Lambda limits 0.970-1.030
1st fast idle = 1.146
2nd fast idle = 1.144

Is this just the lambda sensors? Or could it be exhaust / manifold problems?? Car had not been out the garage for previous 3 months but gave it a good couple of hours run before the test.

Also front tyres are worn on the inside edge a lot more than rest of the tyre, plan on getting the laser alignment done for this, any other advice?

Thanks

Paul

Paul,

Before you get your emissions tested, give the car a good spanking to get the cats nice and hot.

I've had to do this pretty much every time it's been MOT by 'non noble' people.

The reason the tires wear this way is due to the camber. Perfectly normal.


--Jools

[mrpbailey]

Dead lambda's and cracked manifold, oh no, not what i wanted to hear!!
Jools - I did take her out for a good run beforehand but are them readings not a bit high to hope a good blowout will clear it up? Glad to hear about the tyres!

Is there anything i can check at home?

[daddysumo]

[/quote]


The reason the tires wear this way is due to the camber. Perfectly normal.


--Jools



[/quote]

Camber ? What camber on a standard setup, mine had about 1/2 deg neg
Maybe a combination of camber and excessive toe !

[NobleGuy]

I also have wear on the inside fronts much more than outside. when I changed the fronts last year it turns out they were the orginals (5+ years old). Rears are not so durable

I had cracked manifolds but passed emmision tests this year.