What conditions need to be met before the fuel injectors fire?
doing some early morning brain storming before i try and work on my car again tonight, im trying to diagnose why my primary injectors wont fire
-My fuel pump primes
it builds 3 bar of pressure
-I have fuel in the rail, i checked when i pulled the primary rail, primed pump, fuel poured out
-I applied power to each primary injector, they click and were even squirting the small amount of fuel left in the rail.
-I used a multimeter and placed the leads in the fuel connector harness side in both connections, had a friend crank it, and the mutimeter would read voltage, ex: crank,crank,6v,4v,12v,8v repeat itsself, so this means i have power coming to the harness.
-egi fuse is good.
-i have spark, power fc turns on, etc, just wont squirt fuel.
But with the rail in, when i crank the car no fuel squirts out, how exactly do they fire, is there constant power to them all the time?
does the ecu just add a ground to complete the connection causing it to fire?
does this mean i have a bad ground somewhere if every other condition is good?
and where does the injector harness ground itsself,/ any other related grounding points.
Thanks in advance!