Bucko

Hi Gareth,

How old is the trailer? Do you have any pictures? Also, where are you based?

Thanks

Rick

New lambda sensor fitted and emissions are back to acceptable conditions, mot passed.

Thanks all for your advice.

I'm interested 

Rick

I'm currently out of the country, so unable to swap the Lambda sensor. Unfortunately I'll not get to it for another couple of weeks now, I will post a reply once its sorted.

Had a poke around today and all plugs were equally as sooty and all the coils seem to be ok. So as it seems to be a common fuelling issue and not restricted to a particular cylinder, I've opted to change the lambda sensor.

I've gone for a Bosch 0-258-003-229, as I've found reference to this sensor elsewhere on the forum. Hope it's right as it does appear different to the one fitted and google is not coming up with anything referring to the number on the lambda sensor that's currently fitted (P463P).

I suspected the lambda sensor and checked the wiring plug connection as the first and easiest place to check first. It just seems hard to imagine a sensor like that failing with so few miles.

Cheers James, that's very helpful. I'll check the plugs, connections, etc. I may just replace the lambda sensor too, just to rule out.

I'm beginning to suspect a faulty coil, although I would of expected some signs of hesitance or misfire, there's the normal lumpy cold running and then it seems to run just fine once warmed up. Is it possible to diagnose a faulty coil?

Rick

The fast idle results are:

CO - 11.37%    HC - 1405ppm    Lambda - 0.7

I believe the limits are:

CO - 0.3%    HC - 200ppm    Lambda - 0.97-1.03

I don't have any previous results, this is the first mot in my ownership. I had just refitted the cat for the mot as I have had a decat pipe fitted, so I don't think the cat will be shot as it hasn't really been used.

Rick

Hi,

My 420R has just failed the mot on the emissions in cataclysmic style. It's so far out that I don't think replacing the cat will make any difference. There must be an underlying issue yet there doesn't seem to be any misfiring or rough running, I do intend to check the plugs and leads, etc first of all but was wondering if anyone could offer some advice? 
 

I'd like to check to see if there's any faulty codes present that would point me in the right direction. Could anyone recommend an obd reader to check, diagnose and reset fault codes?

What a lovely example of an early unmolested defender. I hope you get what you want for it, although I can't imagine why you'd want to sell it