fuel pump trouble
08-05-2009, 07:55 AM
#11
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
check the R/BK wire it should be hot switched 12v......O/LB= HOT ALL THE TIME.......pk/bk HOT with vehicle in crank or running or breifly for 2 sec when switched ignition on and the T/lg wire is the ecm ground for the windings and out under the hood by eec connector is the VIP self test connector for FP ground it and it should make pump work..if it works that'll tell you the relay, inertia switch and wiring are all good and that the prop is either with a faulty pip signal or ecm not performing the ground function....LUK
08-05-2009, 07:55 AM
#12
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
check the R/BK wire it should be hot switched 12v......O/LB= HOT ALL THE TIME.......pk/bk HOT with vehicle in crank or running or breifly for 2 sec when switched ignition on and the T/lg wire is the ecm ground for the windings and out under the hood by eec connector is the VIP self test connector for FP ground it and it should make pump work..if it works that'll tell you the relay, inertia switch and wiring are all good and that the prop is either with a faulty pip signal or ecm not performing the ground function....LUK
08-06-2009, 12:01 AM
#13
1st Gear Member
Thread Starter
Join Date: Aug 2009
Location: new hampshire
Posts: 54
if the inertia switch is not tripped then you need to see why the ecm is not grounding the relay coil for the f relay....there should be a larger gauge wire hot and the one that becomes hot when relay windings are pulled in which then makes the wire to FP hot hence FP operation....the two smaller wires = 1 switched 12 for relay windings and the other is the ecm ground for windings = controlled by ecm when PIP is seen, PIP is generated/filtered by the tfi on the dizzy, stator in the dizzy Id's tdc and tfi transmits info to ecm where it is all interpereted as inputs and from there ecm performs output functions such AS grounding the windings to the fp relay
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