x-chip runs rich? Bad MAF could cause abnormal boost?
05-06-2004, 07:44 PM
#1
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x-chip runs rich? Bad MAF could cause abnormal boost?
Does the x-chip run rich? I had an earlier post today about having low boost readings so I took it to my Audi mechanic.
He checked it out, hooked up his diag. tool, and found that I was running rich. Since my car was under warranty, he said I could probably get the MAF replaced free of charge.
He thought that a bad MAF could possibly cause the low boost levels. Any truth to this?
He checked it out, hooked up his diag. tool, and found that I was running rich. Since my car was under warranty, he said I could probably get the MAF replaced free of charge.
He thought that a bad MAF could possibly cause the low boost levels. Any truth to this?
05-07-2004, 06:16 AM
#4
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ummm, I think the Bosch -vs- Hitachi MAFs send opposite signals 0-5V & 5-0V
So a failing MAF on each of those might show Rich/Lean depending on MAF. I'm not certain, but I'd investigate it first.
But then again, if a failing MAF means that it's telling the car there is less air flowing then there actually is, then yes, it'll run lean. I just don't recall if both MAF's fail like that.
But then again, if a failing MAF means that it's telling the car there is less air flowing then there actually is, then yes, it'll run lean. I just don't recall if both MAF's fail like that.
05-07-2004, 08:06 AM
#7
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So it seems when they both fail, they both report lower voltages
With the Bosch, that corresponds to lower than actual readings = Lean.
With the Hitachi, that corresponds to higher than actual readings = Rich.
With the Hitachi, that corresponds to higher than actual readings = Rich.
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05-07-2004, 01:15 PM
#8
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I wonder what the increments are per volt or mV for each MAF is?
If the two are the same, it may be possible to invert the signal and run a Hitachi in place of a Bosch!?!
I guess there is more to it that just inverting the signal not that I think about it.
I guess there is more to it that just inverting the signal not that I think about it.
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