3000GT Convertible V6-2972cc 3.0L DOHC Turbo 24 Valve (1996)
Fuel Pressure Regulator, Vacuum Control Line Removed
9. Disconnect the vacuum hose from the Fuel Pressure Regulator, and then measure the fuel pressure while using a finger to plug the end of the hose.
Standard value: 295 - 315 kPa (43 - 45 PSI) at curb idle
10. Check to be sure that the fuel pressure during idling does not decrease even after the engine is raced a few times.
11. Use a finger to gently press the fuel return hose while repeatedly racing the engine, and check to be sure that there is fuel pressure in the return
hose also.
NOTE: There will be no fuel pressure in the return hose if there is insufficient fuel flow.
12. If the fuel pressure measured in steps 8 to 11 deviates from the standard value range, check for the probable cause by referring to the table above,
and then make the appropriate repair.
13. Stop the engine and check for a change of the value indicated by the fuel pressure gauge. The condition is normal if there is no decrease of the
indicated value within two minutes.
If there is a decrease of the indicated value, monitor the speed of the decrease, and, referring to the table below, determine the cause of the
problem and make the appropriate repair.
14. Reduce the internal pressure of the fuel pipes and hoses.
15. Disconnect the fuel pressure gauge and the special tools from the delivery pipe.
CAUTION: Because there will be some residual pressure in the fuel pipe line, use a shop towel to cover so that fuel doesn't splatter.
