having failed my SVA retest on emissions (03 r1) I am trying to work out where the powercommander mapping is wrong - my readings are

co = 4
hc = 4
lamda = forgot to ask

in real terms what do these figures mean the engine is doing and how do I get them nearer the correct reading?

I did take the car to a rolling road for an SVA map so was hoping the emissions would be fine. As this failed I am looking at tweaking things myself but need to understand the whole emissions thing first to make sure I follow the correct path

thanks for any help

didnt the sva tester give you the printout from the emissions test?

quote:

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Originally posted by Davey D
didnt the sva tester give you the printout from the emissions test?

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Sorry, but those numbers don't mean a lot!

Test is

Fast idle (2500-3000rpm).
CO <= 0.3%,
HC <= 200ppm,
Lambda between 0.97 - 1.03

Idle test(450 - 1500prm),
CO <=0.5%

Hard to know what your is. If that CO figure is 4% it's rich and/or the cat's not working/up to temp (Been covered several times so do a search in IVA/legal). Can you get it to an MOT station and ask them to do a BET's test on the emmisions (same as IVA test)? Have you tried phoning the test station and asking for a copy of the test result?

adrian

I am happy to send across the SVA map which my 03 R1 passed with, it was a map from someone else but it failed on my car, so I tweaked it a bit

the tester didnt record the actual figures as the readings were so far out - it was that bad that the testing machine stopped working so he tried another machine and that broke too !!!

I did ask for the figures at the end of the test and thats when he told me 4% and said that all 3 failed (CO, HC and lambda).

I had thought that I had got the cat upto temp (part of the testing equipment melted during the test) but will look at it again

I will try and get my hands on a gas analyser so that I can spend time on doing tests myself to see if I can identify the problem

spdpug98 - thanks for the offer of the map but will hold off until I can see if I can trace the problem in case my own map is ok

your running very rich, i broke one machine and melted another at mot test stations trying to get them sorted for sva

quote:

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Originally posted by markyb
the tester didnt record the actual figures as the readings were so far out - it was that bad that the testing machine stopped working so he tried another machine and that broke too !!!

I did ask for the figures at the end of the test and thats when he told me 4% and said that all 3 failed (CO, HC and lambda).

I had thought that I had got the cat upto temp (part of the testing equipment melted during the test) but will look at it again

I will try and get my hands on a gas analyser so that I can spend time on doing tests myself to see if I can identify the problem

spdpug98 - thanks for the offer of the map but will hold off until I can see if I can trace the problem in case my own map is ok

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Get to your local MOT centre, and ask to use their machine for some beer tokens. Just don't melt their probe (still awiaitng a bill from my local mot centre!).

Remember, you can now drive it to somewhere to get this sorted. As others have said, it sounds like it is rich - can you borrow a wideband lambda sensor to check? I found once I had the lambda spot on (lambda = 1, afr = 14.7) , the emissions dropped well within limit.

all mot centres in Northern Ireland are state run so dont think anyone would risk their job for a few beer tokens - I will try a few local garages to see if they have the right machine and work from there.

I do have a few different maps from a while back so will compare them to my rolling road map to see if they are anyway close