Had that happen once on one of my rangers, it was a 2.9 liter v-6. There are two fuel pumps but if you are getting fuel to the engine I would try the fuel pump relay or the fuel pump reset switch. Of course that's just the starting point it may also be your timing belt.
A check engine light means you have a possible problem with the emission system , you should get the Ranger scanned for trouble codes to diagnose and repair the problem . Once the problem has been repaired the check engine light can be reset.
A clicking noise in the engine of a 91 Ranger could indicate a problem with the valves. A valve lifter in the engine may be worn or stuck.
I have the same problem on my 1998. I just replaced the serpentine belt and it still happens. When I turn on the A/C it gets worse. Any ideas what's causing it?
You will fail emissions. If you dont figure out a way to make that EGR work.
Have vehicle scanned to determine the problem
If white smoke is coming out of the tailpipe when the engine is up to operating temperature it sounds like engine coolant is getting into an engine cylinder from a bad head gasket , a warped or cracked head , or some other problem
Timing chains are not a scheduled maintenance replacement unlike a timing belt. Timing chains usually don't need to be replaced unless there is a problem with the engine itself. Timing chains will last as long as the engine. This is from personal experience.
Is the white smoke coming out of your tailpipe when the engine is warmed up ? If so , it sounds like coolant is getting into an engine cylinder from a bad head gasket , warped or cracked head
O2Sensor.
Never disconnect a battery while an engine is running!
my ranger did the same thing you need to check the wires and the plugs or your o2 sensor behind your cat if ths wont fix the problem you have a serious problem!
I found the problem on my own. The leads to the oxygen sensors where reversed when put back together. Easy to do since my Ranger has 2.