TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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FI/EFI System73 / 126
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EFI SYSTEM — Fuel System — MK3 Supra EFI System, page 73
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SST F11649 SST F04231 SST Disconnect F11650 SST Reconnect F11651 (l) Turn the ignition switch ON. (m) Measure the fuel pressure. Fuel pressure: 7M-GE 2.7 — 3.1 kg/cm² (38 — 44 psi, 265 — 304 kPa) 7M-GTE 2.3 — 2.8 kg/cm² (33 — 40 psi, 226 — 275 kPa) If pressure is high, replace the fuel pressure regulator. If pressure is low, check the following parts: • Fuel hoses and connection • Fuel pump • Fuel filter • Fuel pressure regulator (n) Remove the SST. SST 09843-18020 (o) Start the engine. (p) Disconnect the vacuum sensing hose from the fuel pressure regulator and plug the hose end. (q) Measure the fuel pressure at idling. Fuel pressure: 7M-GE 2.7 — 3.1 kg/cm² (38 — 44 psi, 265 — 304 kPa) 7M-GTE 2.3 — 2.8 kg/cm² (33 — 40 psi, 226 — 275 kPa) (r) Reconnect the vacuum sensing hose to the fuel pressure regulator. (s) Measure the fuel pressure at idling. Fuel pressure: 7M-GE 2.1 — 2.6 kg/cm² (30 — 37 psi, 206 — 265 kPa) 7M-GTE 1.6 — 2.1 kg/cm² (23 — 30 psi, 157 — 206 kPa) If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator. (t) Stop the engine. Check that the fuel pressure remains 1.5 kg/cm² (21 psi, 147 kPa) or more for 5 minutes after the engine is turned off. If pressure is not as specified, check the fuel pump, pressure regulator and/or injector. (u) After checking fuel pressure, disconnect the battery negative (—) cable and carefully remove the SST to prevent gasoline from splashing. SST 09268-45012