The issue with your 1983 Subaru GL losing oil pressure when the accelerator is not engaged and nearing overheating at idle could be due to a failing oil pump, which may not be providing adequate pressure at lower RPMs. Additionally, a clogged oil filter or low oil levels might contribute to poor oil circulation. The overheating could indicate a malfunctioning thermostat, a blocked radiator, or a failing water pump, which impairs coolant flow. It's advisable to check both the oil system and cooling system components for proper function.
Perhaps you have not engaged the clutch? The accelerator is designed to increase the RPMs. If you provide no resistance it will rev until it explodes.
Does the engine rev when you press on the accelerator? If it does check to make sure the emergency brake is not engaged. Is the car an automatic or a standard transmission? You have to make sure it is in gear.If it is a standard the problem is the cluch apparatus, pressure plate etc. If automatic you have to check the level of fluid in the automatic transmission.
Your radiator might have a small pinhole in it, causing it to not build up pressure.
Check the anti-freeze canister for a hairline crack or have pressure tested. Common problem.
Overheating and high boost pressure typically are signs of an EGR problem.
Check fuel pump/filter. Sounds like pressure problem. If you are asking about a accelerator pump on a carburetor equipped engine then it is not spraying fuel either because there is no fuel available at the pump or the pump diaphragm is busted.
You need to have the cooling system pressure tested.
hardware problem hardware problem
Tranny problem.
Your truck is overheating because it needs a new radiator. I had the same problem, after I installed the new radiator and flushed out my remaining cooling system I never had a overheating problem since.
Bring to a shop and have system pressure tested to find where problem is originating
i have the same problem. i have good fuel pressure and new filter. it could possibly be related to airflow sensor or vacuum lines.