Deceleration Shut-Off Check
- Start engine and bring it to operating temperature. Make sure control valve on fuel gauge is open. Briefly increase engine speed to 2500 RPM. As engine speed drops, lower chamber pressure should increase by 5.8 psi (.4 kg/cm2 ).
- Fuel delivery should start again at 900 RPM. If either pressure or engine speed reading is not correct, test throttle valve microswitch, test control current to differential pressure regulator, test ECU and test TD ignition signal.