90 Ford Ranger 2.9L loses oil pressure, etc...
I am working on a 1990 Ford Ranger 2.9L 4WD.
After driving 20 minutes or so it starts running rough and looses oil pressure, it does have a constant ticking/tapping (Valve/Lifter/Pushrod), I am pretty sure it is pinging when the issue occurs, the truck is very loud (exhaust, or lack there of....lol) but I can hear the the pinging over the exhaust. Not sure if it is overheating, temp guage doesn't work along with the fuel level guage.
Any ideas, suggestions, etc....
P.S...I did see someone else had this issue on yahoo or answer.com but no solution was posted.