Jason Fletcher
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| posted on 30/7/08 at 10:41 AM |
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HC reading of -986 ??
Hi Guys, I'm still trying to get my reading down for a SVA test and I have a HC reading of -0986. What does the - sign mean? have I actually go
a reading of 986 parts per million ?
The tester is a Protech Flux 5000 made by Kasama.
thanks
Jason
[Edited on 30/7/08 by Jason Fletcher]
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adithorp
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| posted on 30/7/08 at 11:46 AM |
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Yoy can't have a negative HC reading (unless its some sort of anti-matter generator). If the reading was 900+ you'd have a missfire or an
extremly rich mixture (HC is unburnt hydro-carbons). Sound more like a duff reading. Whats the CO?
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Jason Fletcher
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| posted on 30/7/08 at 12:12 PM |
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I recon it was a duff reading... it was reading about 300 in fresh air..
I reset the machine and now I have managed to get it so it will pass sva. The only problem I have now is that the exhaust heat has taken the paint
off the side skin. Bugger!
Jason
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Agriv8
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| posted on 30/7/08 at 01:27 PM |
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Not sure on this machine but on the MOT ones i have played with they calibrate ( get a base reaeding before the test ).
I suspect that yours has calibrated its self while seeing a lot of HC ( possibly if it was calibrating while you were starting the engine cld ect ect
) as those drop after startup you have got through into the - figures.
regards
Iain
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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Jason Fletcher
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| posted on 30/7/08 at 05:19 PM |
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Ian
yes I think you are right on the button there. I must have calibrated it with some exhaust gas up the spout.
jason
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