Club 80-90 Forums

Just looking at my Log book and noticed it doesnt tell me the emissions for my 2.1 dj does anyone have this infomation to hand?
Cheers Jonny

It's in Haynes, you have got a Haynes haven't you?

2% +/- 0.5%

I do! Just not sure where it is!

Can i get the Co- g/Km Reading please Itchy its just for my work for fuel expenses!?

nonny112i wrote:Can i get the Co- g/Km Reading please Itchy its just for my work for fuel expenses!?

sorry no idea.
maybe never measured for old vehicles.

There's no correlation between % CO and g/km. The test parameters are unknown, so one cannot directly convert one to the other, even if you knew the mpg figure.
NB I didn't really understand the original question. Is this g/km figure on the V5 of newer vehicles? I've never seen the V5 of a vehicle newer than 2001! And the irony struck me that the OP refers to a "log book"

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Figures from Autodata are

CO idle speed @ tailpipe Vol % CO 2.0 +/- 0.5
HC idle speed ppm 300
CO2 idle speed Vol % CO2 13-16
O2 idle speed Vol % O2 0.5-2.0

Hope this helps.

nonny112i wrote:Can i get the Co- g/Km Reading please Itchy its just for my work for fuel expenses!?

This is a tax question.

Your T25 is pre 2001 so there is no tax relevant emissions data for your vehicle, but those emission numbers are only used for setting the car tax (old tax disc) thing and company car benefit for an employer provided vehicle.

For business miles in an employee owned vehicle your employer will likely be using the approved mileage rates of 45p / mile for the first 10,000 miles, 25p after that. They then need to know what fuel and engine size you have so the can make the appropriate VAT reclaim.

If your employer has decided to include this on their forms then they don't know what they are doing or it's not for tax purposes

https://www.gov.uk/expenses-and-benefit ... es-for-tax

Thanks for all your Replys. Great help Cheers

Is % CO Vol reading low an indication that the mixture is too rich or too lean? My MOT reading was 0.1%

I have asked my mechanic to tune the carb so hopefully it will be in spec when I get it back...

That's lean to the point it would likely start to display symptoms of poor uneven combustion, raising HC levels. Commonly healthy figures would be anywhere between 0.8-2% CO, and HC of 200-700ppm at idle.

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While on subject:
Can someone tell me on 2.1 WBX
CO (mixture) adjusting screw. Which direction for lean/rich?

Assuming you mean an injection WBX (digijet/fant), and are referring to the adjuster on the AFM:
CW closes the bypass thus forcing more air past the flap, opening it more and increasing the fuelling. Therefore, CW richer, ACW leaner.

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Yes that's the one thanks . I have recently fitted a rebuilt engine and possibly not unsurprisingly am having difficulty setting up the slow running. I found and fixed what I believe to be all the main suspects for air leaks including the injector seals one of which seemed to affect tick over when wiggled. Although the idle speed adjusting screw still needs to be screwed in too far for my liking. To be honest I haven't really taken too much interest in the injection system in the past apart from resetting the throttle valve switch and cleaning the idle speed control valve. Back to square one I guess although I have ordered a Exhaust Gas CO Meter. Need to do the test around the idle system in detail.

ajsimmo wrote:That's lean to the point it would likely start to display symptoms of poor uneven combustion, raising HC levels. Commonly healthy figures would be anywhere between 0.8-2% CO, and HC of 200-700ppm at idle.

Thanks Andrew. Strangely HC levels are very low too at 50ppm. No issues with power - 50mph up hill in 4th etc.I'm beginning to think that the CO analyser results are incorrect. It will be interesting to see what the post-adjustment test says.