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fuel pump not coming on
Posted: Sun Sep 27, 2009 5:54 pm
by Scotty Dont
this is on a msii v3.0 board and when the ecu is powered up the fuel pump wire has no voltage. Am I missing a setting here, I thought ms was supposed to switch on the relay aslong as Prime pulse was greater then zero.
Re: fuel pump not coming on
Posted: Sun Sep 27, 2009 7:37 pm
by Dennis930
MS provides a ground circuit for energizing a fuel pump relay, whether you use a factory relay or add a relay to control the fuel pump. So, you will not see voltage at pin 37 of the DB37 connector because it reads to ground when the fuel pump signal is energized during priming pulse or when MS receives tach signals.
-Dennis
Re: fuel pump not coming on
Posted: Mon Sep 28, 2009 12:24 am
by Scotty Dont
HAHA thanks for the quick reply, I changed the relay to a switched ground turned the key and she fired right up
