Pressure Regulator
WARNING: This page is about a different car, the 1995 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.
- Install fuel pressure gauge on fuel rail. Use care when installing fuel pressure gauge, as fuel lines are under pressure. Disconnect vacuum hose at pressure regulator.
- Start engine and note fuel pressure. Ensure vacuum supply exists at vacuum line. Reconnect vacuum hose. Fuel pressure should decrease slightly. Replace regulator if pressure does not change.
NOTE:
Malfunctioning pressure regulator VSV may set Code 25 or 53. For additional testing, see TESTS W/CODES - 3.2L
article.