Quote:
Originally Posted by steffen707
WOW!, I suppose you could hook up a fuel pressure gauge to the fuel line to test this, although if the 3% directly compares to 3% less fuel pressure, then it will be hard to tell unless you have a really acurate gauge.
I'm wondering if the same thing is happening to me, because monitoring my voltage while driving with the alternator on, it will go for miles without going above 12 volts, then it shoots up for some reason. On the highway today I noticed that it almost always stayed at 13-14 volts even with a low accessory load. I don't know if that's because the injectors and ignition were using a lot more electricity on highway use, or if it figures at higher speed you can charge faster?
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That's the ELD circuit. Electrical Load Detection. Search for it here on ecomodder; we've had some discussions over the past year. You'll find it in the threads on Civic alt cut via switches. The ELD circuit reduces (or eliminates) alternator output when it determines that [primarily]: the battery is topped up and demand for electrical power is low. It does NOT disable the alt if coasting in gear, or if speed is over 50 mph.