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Author Topic: Using Live Data  (Read 1196 times)

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Proz

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Using Live Data
« on: 21 February 2009, 15:37:28 »
Im trying to find out why i have constant P0170 lean exhaust and constant MIL light on.  So if i have live data and my laptop what sort of things should i be looking for ie O2 sensor values , maf values etc ......I've seen lots of pretty numbers but they mean nothing to me  :-[

Thanks
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Kevin Wood

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Re: Using Live Data
« Reply #1 on: 21 February 2009, 16:32:49 »
The fuel trims (long term and short term) would be interesting, Lambda sensor voltages (see if there's activity) and, if you can get someone with a known good MAF sensor to provide some figures for comparison, the MAF voltage &/or volume.

Air and coolant temperatures - make sure they're plausible.

Kevin
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Proz

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Re: Using Live Data
« Reply #2 on: 21 February 2009, 16:43:23 »
Ok thanks .... i'll go out and play tonight or tommorrow with pen and paper and write things down  :y
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Proz

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Re: Using Live Data
« Reply #3 on: 21 February 2009, 17:53:32 »
Should my readings be taken at idle or a various throttle settings.
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feeutfo

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Re: Using Live Data
« Reply #4 on: 21 February 2009, 17:59:37 »
Quote
Should my readings be taken at idle or a various throttle settings.
Would be good to see difference when maf swapped with a known one , as said.
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Proz

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Re: Using Live Data
« Reply #5 on: 21 February 2009, 18:52:40 »
I cant think of anyone even remotely near me with a 2.2 roughly the same year  :-/
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Re: Using Live Data
« Reply #6 on: 21 February 2009, 20:29:40 »
Maybe someone here will be able to take some readings if MAF is suspect. I would be inclined to take some readings at idle and a fast idle, say 2500 RPM with a fully warmed up engine and compare with another car.

Kevin

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Proz

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Re: Using Live Data
« Reply #7 on: 21 February 2009, 20:40:50 »
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Maybe someone here will be able to take some readings if MAF is suspect. I would be inclined to take some readings at idle and a fast idle, say 2500 RPM with a fully warmed up engine and compare with another car.

Kevin

 

Ok thanks for that .... will try and find time to do it tomorrow  :y
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