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Home >> Isuzu >> 1991 >> Impulse RS >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Fuel System Pressure Release

Fuel System Pressure Release

WARNING: ALWAYS relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact electrical parts while testing fuel system components.
NOTE: Fuel pump relay is located on left fender panel, behind battery.
  1. Loosen fuel filler cap to relieve tank pressure. Remove fuel pump relay from underhood fuse/relay box.
  2. Start engine and allow to run until it stalls. Loosen hose clamp of fuel line on side of pressure regulator coming from fuel line inlet distributor pipe.
  3. Cover fuel hose with a shop towel and slowly pull hose from pressure regulator to relieve fuel pressure. When fuel stops leaking, reinstall hose and clamp.