We bought this used a few months ago. At first there was no noise except a quick click. The engine seemed stuck as well.
since then, we've got it unstuck, changed the spark plugs, coil pack, fuel pump, fuel filter, cam and crank sensor, starter, and checked all fuses!
Right now it will crank but won't start! Any ideas before I give up?
Also, there are no codes coming up!!

 

Welcome to the forum

Stop changing parts
Except for the spark plugs and starter motor, the rest were a waste of money and now THEY have to be tested

2002 Ranger which engine?
2.3l, 3.0l or 4.0l?

General test for all vehicles any engine
Turn on the key
CEL(check engine light) should come on, that means the computer has booted up, no CEL = no computer, and no start
Turn key to START
If engine spins then CEL should go OFF, that means computer is getting a valid timing signal from Crank Sensor, if CEL stays on the computer will not start spark or injectors


If CEL comes on with key on and then goes OFF when engine is spinning, but no start, then do 50/50 test
Also for any engine, lawn mower to V12, carb or injected
Spray fuel into the engine manually, gasoline, quick start(ether), carb cleaner, ect.....
Try to start
If it starts, runs and dies spark is OK but no fuel into intake
If it doesn't start then no spark or no compression
50/50 instant results on where to look next

Try 50/50 test and also include engine model

 

When I turn the vehicle on the check engine light shows, but when I go to crank it it does shut off. I just rented a compression check tool from AutoZone and it looks like the whole right side (when in vehicle) has absolutely no compression. It shows zero (cylinders 1,2,3). When I do the left side, cylinders four five and six, they all show 90 PSI. Where do I go from here, any suggestions?
Also, it's a 4.0

 

Bummer

You have a 4.0l SOHC engine in a 2002 Ranger, it has 2 long timing chains, one or both have slipped
The engine will need to be pulled out to fix these

But you will replace all 4 chains and their guides while engine is out, there is a kit for this

1997-2002 4.0l SOHC engines had faulty tensioners, Ford redesigned them but didn't make it in until 2003 model years
But most owners updated the 2 long chain tensioners by 2000 when problem was found, I guess not in this case
Loads of videos on doing the timing chains on these engines
The two long chain tensioners need to be changed, regardless of year, every 100k miles