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Factory map sensor voltage range? 

 

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Posted: Mon Jul 17, 2006 9:32 pm 
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if it was running fine id ignore it, but at the same time as the AFR is going between rich/lean there is a very definite power increase/decrease

 

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Posted: Mon Jul 17, 2006 9:34 pm 
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Have you run diagnostics on the ecu?

 

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Posted: Mon Jul 17, 2006 9:35 pm 
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yeh, had a workshop do that, they said there was nothing.

 

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Posted: Mon Jul 17, 2006 9:37 pm 
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JOSE wrote:
yeh, had a workshop do that, they said there was nothing.


I would try it again yourself.

 

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Posted: Mon Jul 17, 2006 9:48 pm 
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stockstandard wrote:
arm79 wrote:
If you truely want to measure the AFR's, you'd have to get a wideband O2 sensor and the appropriate reader and see what its doing as your driving. From memory general driving and cruising should be 12/13:1's, lean cruise will be around the 14.2/3:1, WOT will be in the 11/12:1 mark, idle should be at the 13 to 13.5:1 mark.


As a rough guide you want 14.5-15.5 (stoich to slightly lean) at cruise, 14-14.7 (stoich to slightly rich) at idle, and 12-13 at WOT (rich)


I realise roughly what you want, I'm just reporting what I remember seeing last time my car was having some fun on the dyno with a factory ECU which has a tendancy to run rich.

JOSE wrote:
yeh, had a workshop do that, they said there was nothing.


We did a test after the motor was installed to do the timing and s**t, and it reported nothing...
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Posted: Mon Jul 17, 2006 9:52 pm 
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arm79 wrote:
I realise roughly what you want, I'm just reporting what I remember seeing last time my car was having some fun on the dyno with a factory ECU which has a tendancy to run rich.


The stock ecu only runs rich at WOT. At idle and cruise they usually run stoich to lean (At least on the ones ive put a WBO2 on).

 

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Posted: Mon Jul 17, 2006 9:56 pm 
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I do have an XR... So it may be a difference in tune as well. :?
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Posted: Tue Jul 18, 2006 1:41 pm 
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VAC gauge reports nothing funny - so now im left with 3 options:
Dizzy/coil
fuel line problem
wiring problem

 

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