Ford Repair Questions? Ask a Mechanic for Answers ASAP
DOes the check engine light come on with the key on?
WHat is the fuel pressure at currently?
It sounds to me like the computer is not coming on. The computer is supposed to turn the check engine light on when the key is turned to the on position.
This would also make sense that you do not have communication with the computer.
TO verify this, we should check the reference voltages under the hood to the tps sensor and maybe even the egr sensor.
With the key on, we should have some sort of reference voltage to most of the sensors under the hood.
Start with the tps sensor.
I will be waiting!
If no reference voltage to any of the sensors, check all computer fuses, powers and grounds!
WHat is fuel pressure at when you turn the key on?
DO you have fuel trigger?
Well there are a few things. Let me get you a wiring diagram.
We just have to figure out which signal is staying on. Here is some info about the fuel pump relay.
OPERATION When the ignition switch is turned ON, the Electronic Engine Control (EEC) power relay is energized, providing power to the fuel pump relay for 1 to 2 seconds through the Powertrain Control Module (PCM) and an Inertia Fuel Shutoff (IFS) switch.
Fuel pump power is provided through the fuel pump relay contacts, if the PCM does not receive an ignition signal within approximately one second after the ignition switch is turned to the "ON" position. A timer circuit in the PCM will open the ground circuit to the fuel pump relay, causing the fuel pump relay contacts to OPEN. This action stops the power supply to the fuel pump.
When the ignition switch is turned to the "START" position, the PCM closes the ground circuit to the fuel pump relay, resuming operation of the fuel pump.
After the ignition switch is returned to the "ON" position, power to the fuel pump is supplied through the fuel pump relay.
The PCM monitors engine speed and opens the fuel pump relay ground circuit if the engine speed drops below 120 rpm.
UNDERHOOD VIEW Left side of safety wall.
Well I can definitely walk you through this. You might need some diagnostic tools
I would like to check fuel trigger, as well as fuel pressure. In addition, I would like to find out why the fuel pump continues to run.
DO you need the procedure for pulling codes? wOuld that help you?