Mechanics

NO START

1987 Ford F-150 • 4.9L 6 cylinder 2WD Automatic • 196,301 miles

My truck will not crank and it won't crank with starting fluid I found out after buying a few things that
The truck isn't getting any spark at the plugs or coil I've replaced the coil, distributor cap, rotor button, battery, fuel pump relay, fuel injector relay, both fuel pumps, solenoid, spark plugs, and wires I even replaced the starter after all that I gave up and had my mechanic work on it after I got it back it ran for a month then the same thing again I called the mechanic he said to get a crank sensor and I can change it myself but I can't find it and he won't tell me where it's at. Is the crank sensor my problem or something else. Please help
Avatar
Walkingdead54
March 1, 2014.




Hello,

Ok, If there is a Crank Position Sensor it should be located somewhere around the Crank Shaft Pulley, Looking at for that year I don't see one.

Is you engine light on? If so pull codes.

To check for codes without buying a code reader is simple. If your EEC is wired correctly, the engine light works, and thereare not any electrical faults in the vehicle you can get the codes out of your EEC.

1. Turn key to OFF.
2. Get a length of wire that can connect the STI tothe negative battery terminal or body ground.
3. Ground the Self-Test Input.
4. Get some paper and a pen.
5. Get comfortable in the drivers seat.
6. Try to keep your self from getting distractedfrom here on.
7. Turn key to RUN.
8. You will hear some relays engage and the fuel pumps prime the system. This is the EEC beginning the test.
9. When the fuel pumps stop be ready to count!

If you are a lost soul that does not have a working engine light, or did not install a light into your dash don't fret. You canstill get the codes. You still need that wire to ground out the STI. Now you will need one of the following tools; digital voltmeter, analog volt meter, test light, or you can hook up any other 12 volt light that does not draw more than 0.5 watts max.

1. Turn key to OFF.
2. Get a length of wire that can connect the STI to the negative battery terminal or body ground.
3. Ground the Self-Test Input.
4. Attach one side of the test device to the Self-Test Output (STO).
5. Attach the other lead to the positive side of the battery.
A) If you are using a digital voltmeter you'll want to use the continuity setting.
B) If you are using an analog voltmeter you'll be counting the meter make sweeps.
C) If you are using a cheep light you'll count like the rest of us.
6. Get some paper and a pen.
7. Get comfortable in the drivers seat.
8. Try to keep your self from getting distracted from here on.
9. Turn key to RUN


Obxautomedic
Mar 8, 2014.


AD