'89 4x4 turns over, but won't start
So I've been working on my truck on and off for a while now. it used to start and run pretty decently, but had suspension issues (which i fixed). after sitting for a short time, it decided to quit running. it would click and grind when i turned the key. so i replaced the solenoid. then it would click but not grind. then i re-replaced the starter solenoid (first one cracked) and put in a good battery. now it will crank over, but unfortunately, it still still wont start.
i havent figured out if it is an electrical/spark issue or a fuel issue.
i have yet to try starting fluid - where exactly do i spray it? (i'm a total novice..)
Secondarily, how do i check for spark? Do I check at the ignition coil, which I think is located on the drivers side front fender area? And what is the process for checking the spark?
Also, is it possible this is a starter problem? or would i not even get the engine to crank if it was the starter?
edit: ps. it's an '89 ranger 4x4 V6 2.9