I ran out of gas while driving my truck and it hasn't started since. I replaced the fuel pump, ignition coil, and the relay module battery. The solenoid might also need a wiring harness.
Hello and thanks for the question. That is a lot of good information you have shared, and its always a good idea to pass along any information that may help the mechanic. However, I would recommend having a mechanic, such as one from YourMechanic, inspect your truck, determine the reason for your no start, and test each part in that system to verify proper operation.
How to Identify and Fix Common car Problems ?
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The most common reasons a Ford F-150 won`t start are a dead battery, an alternator problem, or failed starter.
The fuel pump relay on the 1986 Ford F-150 should be mounted in the engine compartment against the left side fender apron.
Once the vehicle determines the systems are safe, then the vehicle allows you to restart. The fuel pump shut-off switch is located behind an access panel on the right side of the luggage compartment. The fuel pump shut-off switch has a red reset button on top of it.
The 1988 Ford F150 fuel pump relay location is in the fusebox underneath the hood of the vehicle. Simply pop the hood, look for a black plastic box in the rear-right of the engine compartment, and you`ve found the fuse box. From there, pop the tabs on the fusebox and flip the lid over.
The cause of this problem is usually one of 3 things – a failed starter motor, a bad connection between the battery and starter motor, or a blown fuse (if present) in line between the starter and the battery.
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
The electric fuel pump on a vehicle with a spark ignition engine is controlled by a fuel pump relay. The engine control module (ECM) activates the relay when operating conditions are correct. For safety purposes, the fuel pump relay is only activated when an engine speed signal is received by the ECM.
The fuel passes through a Venturi tube in the nozzle, which changes the speed and pressure of the fluid passing through. This creates a vacuum that pulls on the valve and shuts it off when there`s no more air passing through.
The fuel pump shut off switch is designed to disengage the power to the fuel pump when a vehicle comes to an instant stop. Most vehicles today have an inertia switch near the main air bag module with a reset button.
There is three.. don`t listen to that other guy.. my 88 regular cab had one in each tank and an inline pump near the diverter valve underneath the drivers side door in the frame rail. 10 people think this is helpful.
Best Answer. its a relay,the relay box for your fuel pump relay shoud be under tha hood close to the fire wall on drivers side,if a remember corectly there is a green one and a brown one.
And if that`s faulty or the fusible links are damaged, your car wont start. A damaged or blown fuse can prevent power from reaching the starter relay, which is needed to provide the spark, the ignition, and the power to move your vehicle.
Quite rarely but surely enough a bad throttle position sensor can create a no-start condition where you may be able to just crank the engine and not turn it over.
The crankshaft position sensor is the most important of all engine management sensors, and the engine will absolutely not run without it.
If either due to a faulty crank sensor, or ecu, the crank sensor signal is not being read, the ignition and fuel pump systems will not power up.
Find the fuel pump relay in your vehicle`s fuse box
The main fuse box is usually located underneath the hood near the front of your vehicle, but there may be a smaller fuse box under the steering column inside your vehicle as well.
Without this relay, the engine would not receive fuel while starting. The pump that delivers fuel to the engine while the engine is running requires electricity in order to operate. This electricity is created by an oil pressure device in the engine.
You can use one of the ME ECUs Slow/Relay Low Side (LS) drivers to drive the fuel pump. Note this must be done via an automotive four-pin relay as fuel pumps can draw 20+ Amps. If you do not have enough Relay Low Sides, then you can of course use a PWM Low Side instead.
If you there is no power to the fuel pump or the relay, then there may be a possible electrical issue with the vehicle. I would first verify that the main EFI, fuel pump, and ignition fuses are not blown, as these can sometimes cut off power to the fuel system.
A poor connection can cause enough resistance to lower the amount of voltage reaching the pump. This causes the pump to turn more slowly than it should, and can shorten the life of the pump. Replacing the vehicle side connector should solve the issues with poor connections, but sometimes causes another problem.
The fuel pump relay plays an integral role in getting fuel to your engine for combustion. Powered by the ignition and/or powertrain control module (PCM), the fuel pump relay`s main function is to provide the fuel pump with enough power. When the fuel pump relay isn`t working, then the fuel pump cannot either.
when you switch the ignition on, the fuel pump situated inside the fuel tank starts pumping fuel to the engine. so yes, it DOES run even when the engine is off, when the ignition is on.
Fuel pump failures tend to be sudden and unpredictable, with few symptoms to warn the motorist that trouble is brewing. And the higher the mileage on the vehicle, the greater the risk of a fuel pump failure.
In typical designs, the volume of fuel pumped is controlled by a Flow Control Valve (FCV) located on the inlet of the pump. The valve is electronically controlled by the engine control unit to regulate fuel rail pressure.