Deceleration Fuel Shut-Off

Checking Deceleration Fuel Shut-Off

Requirement

Engine oil temperature minimum 80°C

Fuel shut-off will occur only when:
Throttle is closed
Coolant temperature is above 50°C (122°F)
Engine speed is above 1250 RPM
Engine speed was above 2600 RPM






- Bridge connections in connector 2 with square side of double adapter VW 1490 and give slight amount of gas

Engine RPM must vary (surge, then deceleration fuel shut-off begins)

If Not check for:
Break in wiring
Temperature sender for engine temperature defective
Control unit defective