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Old 11-10-2013, 08:01 PM   #11 (permalink)
The brake pedal is evil
 
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You could have a MPGunio or similar check the injector pulse width against a curve of where engine braking starts and have it turn on a light when it falls below that.

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Old 11-17-2013, 04:35 PM   #12 (permalink)
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In my current and previous car I notice a change in sound in the transmission. When the engine output matches the transmission (rolling) speed I hear a high pitch whine from the gearbox (I presume). I get good mpg figures on the SGII for this period. But it inevitably results in a gradual slowing of the car so it can't be maintained for more than a few minutes.
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Old 11-18-2013, 08:22 PM   #13 (permalink)
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What vehicle is this? On one with dfco, the pulse width would go to zero. When past this threshold, a signal to the IAC would also indicate drag. This assumes braking, not lugging.

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