1999 Ford F-150 will not start turns over but does not start?

Answer 1

Clogged fuel filter or line. Don't laugh, out of fuel? it has happened to me.

Check the ignition control module. Its usually underneath the distributor. In my 1993 f150 it is located under the hood on the driver's side mounted to the right hand wall.

It looks like a plastic fork. Sometimes it has small metal contacts that look like teeth sticking out one of the sides. It also has a female receptacle on the end that looks like the head of a fork. That would be where the wires that run to the distributor cap connects to. The wires coming from the distributor cap should be a connector with a male end.

Disconnect the ICM. You may need a special tool to do so. The auto parts store should have the tool on hand. Check the ICM for a white chalky substance or corrosion on the metal plate on the ICM as well as the teeth of the forks. First try to clean the corrosion or chalky substance off. Then reconnect the ICM. Try to crank up the vehicle. Sometimes this may be the issue. It was in my case, I simply cleaned it off and reconnected it. If the corrosion is too bad or the vehicle will not start then you need a new ICM. I believe they run from 30 to 70 bucks with a lifetime warranty.

Another issue might be the air intake/intake air sensor. In most vehicles it is located in the engine air cleaner housing where the air filter is or connected to the air housing ducts that lead to the fuel injector. However in the 1993 Ford f150 with a dual gas and propane tanks the air intake sensor is located directly above the exhaust manifold.

Be careful because there is a thermostat located directly in line with the radiator and looks exactly like the air intake sensor. Now the air intake sensor is extremely difficult to remove especially if the vehicle is older and has been exposed to extreme weather conditions. There are plastic tabs that connect the male portion that has wires running from it to the female portion on the end of the air intake sensor. The plastic tabs are extremely fragile and difficult to remove.

Now getting the AIT sensor out on models with dual fuel tanks is difficult. You can just break off the plastic piece on the old AIT and use pliers to remove the AIT. Otherwise I believe you'd need a 5/8 or 7/8 deep socket with an extension to remove the old AIT. If you get the old AIT out in one piece it can be cleaned (very carefully) and re inserted. If not, then you need a new one and they run about $15.99 with a two year warranty.