Mechanical Inspection: Compression
WARNING: This page is about a different car, the 1990 Subaru XT6, 1990 Subaru XT, 1990 Subaru Loyale, and 1990 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Check engine mechanical condition with a compression gauge, vacuum gauge or an engine analyzer. See engine analyzer manual for specific instructions.
WARNING:
DO NOT
use ignition switch during compression tests on fuel injected vehicles. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate the engine's oiling system.