Re: 90 ranger 2.9L Loses oil pressure and runs rough
Need to get an aftermarket gauge on that thing and check the specs. Try and ground the temp sensor wire and see if the temp gauge reads full hot. If pressure is really dropping off, could be pick up clogging up, pump tolerances too loose (worn out), or the engine tolerances are too large (worn out). Hard to say for sure, best to get an opinion from someone with a good ear for engine noises. These engines are notorious for lifter ticks, and the oil system is known to be problematic. The rocker arm shafts tend to plug up as well. Regular maintenance is very critical.
1987 Ford Ranger Short Bed 5.0L/T-5 Project
1988 Ford Ranger Long Bed Parts Truck
1993 Ford Tempo 2.3L OHV HSC Auto - D/D Stock.
1999 Honda Accord VTEC Auto
2002 Dodge Caravan - 3.3L Auto