I got a question, /o/. My 90 ford ranger is in due of a fixing.

>>17578589
A rear main seal leak is both a common issue and a frequently misdiagnosed issue. It is one of the lowest points on the engine. The oil could be leaking from higher up and dripping down to that area, making it appear to be an rms leak. The leak is also unrelated to your other problems. How much oil are you losing?

You can start with a basic tuneup. New air filter, new spark plugs, etc. Youtube tutorials are your friend.

The idling and hesitation sounds like either a vacuum leak or a stuck EGR valve. It's not OBD2, maybe OBD1 was around back then? It's going to be interesting talking to that old ECU whatever it is.

>>17578765
Well every two months give or take 3 I add 1 quart of oil.
>>17578792
It has obd1 just searched it up

>>17578589
Rear main sales is common a common failure.
The seal itself is cheap and easy to change, once you get to it. You have to remove transmission and flywheel/flexplate to get to it.
For idle issue I'd look at IAC (idle air control valve), but there's too many possible culprits to just throw parts at it.

>>17579062
Well thats not so bad. Manufacures say that engines are "suppose to" burn a quart every 3000 miles, but thats alot of oil to burn.

Pro tip some mazda pick up truck parts will work with your ranger.