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Old 08-27-2008, 03:20 PM   #1 (permalink)
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SG shows 0.04 GPH during EOC

Shouldn't it read 0.0 GPH and 9999 MPG like during DFCO?
Instead I get 0.04 GPH. Which isn't much, but MPG's go to 1K or less, depending on speed, of course.
Does this mean I have a leaking injector?
But if I did, would I still get the maxed readings during DFCO?

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Old 08-27-2008, 06:01 PM   #2 (permalink)
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Tango Charlie -

(I have an old-school-ugly SGI)

I don't think you have a leaky injector. Even 9999 MPG is technically wrong. My theory is that there is some kind of divide by zero failsafe leading to the 9999 MPG, which should otherwise be infinite.

When I EOC, my MPG is 10 times my MPH. Soooooo, If I am coasting at 45 MPH, the SG reads 450 MPG.

The 0.04 GPH and sub-1K MPG sounds similar to mine. The next time I do an EOC, I will check on my GPH and tell you what it is.

On a similar note, when I EOC, the engine RPM should be reporting 0. However, on my 1999 Saturn SW2, it reports 61 RPM. This leads me to believe that either :

1 - There is "noise" in the RPM sensor.
2 - The ECU/PCM is reporting 61 RPM even though it is "seeing" 0 RPM from the sensor.

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Old 08-27-2008, 06:24 PM   #3 (permalink)
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it is cause of the % of correction, i have 10.1% correction and see .05 on the sg when eocing, but i am still getting the exact fuel in the tank as it says. if it says 12.2 gallons till full it usually takes 12.2xx gallons

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