Voltage Comp
FIScot at aol.com
FIScot at aol.com
Wed Jul 26 00:17:58 GMT 1995
Subj: Re: Voltage Comp
From: elansi01 at ctlw3908.mpg.gmpt.gmeds.com (Ed Lansinger)
> Full-open injector flow is not affected by voltage per se. Fuel pump
> flow is, so you've still got to correct the full-open time. EFI fuel
> pump manufacturers characterize their pumps at a range of supply
> voltages. You could start there or measure things yourself.
This seems like it would only apply if the fuel pressure fell below the
regulated preset. I don't know how much over capacity the fuel pump
has, but with today's eye on bottom line, I imagine that it is not a
large margin. It would seem a good idea to lower the RPM limiter when
voltage is low. This might stop high RPM lean-out and the sometimes
disastrous results..... And make the owner take the car to the repair
shop to get it fixed. I see a new error code coming... Low RPM limiter
due to low volts or fuel pressure....
Scot Sealander FIScot at aol.com
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