on the side of the distributor is is rectangle
Could be the ignition module. It's attached to the side of the distributor.
Would be in the distributer or the ignition module
The ignition control module for a 1995 ford f150 is an important part of the drive train. If the module is failing then the engine will run erratically or not start at all.
under the dist. cap
It sounds as if you have a bad ignition control module. It would be located on the distributor. On some of these vehicles, the module was moved over on to the side of the left fender. Ford had a lawsuit against them for these modules, but the time to submit claims against them has expired. It is also referred to as the thick film ignition (TFI)module.
On the distributor
pull the distubartor and have the module checked its more then likely bad i had the same problem in my 90 f150 with the 300 straight 6 i changed it and it fired right up
It has a timing chain.
did you changed your thermostat? You MUST keep around 195 degree thermostat in the vehicle at ALL TIMES due to the computer system. The ignition module usually gets hot due to corroded electrical connections at the ignition module and or the module is HEAT SENSITIVE and needs to be replaced. (plug wires) Ignition misfire can produce a variety of driveability symptoms including hard starting, rough idle, hesitation....
The only other thing you can really do is get a manual from your local parts store or online. The cost is about $20.
behind the passanger glove box on the right side. its a small black box.
Chances are there is no polarity. An ignition coil is simply a wound of wires used to generate high voltage. But you may find a marking on it such as a "+" or a red wire wich would indicate the positive electrode.