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check the firing order of the plug leads as they may have become crossed during the plug change. Check that the coil wire is firmly in the distributer cap.
Injectors get their power from the main relay and get their ground signal from the computer. The power to the injector wire is BK/W , The input power wires to the relay are blue. Jump these two wires to bypass the relay. The blue wire gets it's power from the EGI fuse in the engine compartment fuse box. If fuse is ok, jump a 12 volt source wire to terminal on relay to repair problem.
Capri main relay
This Mercury Capri main engine control relay is located under/behind the LH headlight (bucket) and interfaces with the PCM/ECU. this is a double relay.... one set of contacts according to the wiring diagram. runs just the injectors.. the other set run a bunch of other devices on the motor.
According to the manual the STO (self test output) of the ecu/pcm....when tested...is supposed to read STO low or 0 volts and if anything would be wrong the needle on an analog V ohm meter will sweep back and forth from low to 12 volts to spell out the
code for the problem. When it stays at 12v would that indicate that the PCM is bad??
Check the main relay that is located behind the drivers side headlight can but to do so remove the coolant overflow bottle. In the process of testing, check for corrosion on the blue wire that goes into the green three wire connector.repair any brakes in the wires
Go to your local auto store and get the Hanes auto manual for this care and they should have a wiring schematic for you to follow also you can look your new stereo up on the web and find out what each colored wire goes to what!!! Good luck
Vehicles involved in the recall include the following:
1998-2002 Ford Ranger 1992-1997 Lincoln Town Car 1992-1997 Ford Expedition 1992-1997 Mercury Grand Marquis 1993-1998 Lincoln Mark VIII 1993-1995 Taurus SHO 1999-2001 Ford Explorer 1999-2001 Mercury Mountaineer 2001-2002 Ford Explorer Sport 2001-2002 Ford Explorer Sport Trac 1992-1993 E150-350 Vans 1997-2002 E150-350 vans 1993 Ford F-Series pickups 1993 Ford Bronco 1994 Mercury Capri 2003-2004 Ford F0150 Lightning 1995-2002 Ford F53 motor homes.
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