WHEN THE CO PERCENTAGE IS RIGHT AND THE CO2 PERCENTAGE DOES NOT FALL INTO
THE SPECIFIED VALUES, THE LAMBDA VALUE IS ALSO DISTORTED. IF THIS OCCURS, CARE-
FULLY CHECK THE EXHAUST SYSTEM FOR ADEQUATE SEALING.
When the CO percentage is correct and the HC (PPM) value exceeds the maximum limit allowed, check:
- spark plug
- valve clearance
- timing system phase
- outlet valves for sealing
When the control unit is replaced, reset TPS and pre-program the trimmer value of the original control
unit (if available) preventively.
In any case, check the CO value again.
N.B.
WHEN THE CO PERCENTAGE IS RIGHT AND THE CO2 PERCENTAGE DOES NOT FALL INTO
THE SPECIFIED VALUES, THE LAMBDA VALUE IS ALSO DISTORTED.
If this occurs, carefully check the exhaust system for adequate sealing.
When the CO percentage is correct and the HC (PPM) value exceeds the maximum limit allowed, check:
- spark plug
- valve clearance
- timing system phase
- outlet valves for sealing
When the control unit is replaced, reset TPS and pre-program the trimmer value of the original control
unit (if available) preventively.
In any case, check the CO value again.
Circuit leak test
Before performing the checks concerning the sys-
tem pressure, it is necessary to carefully clean all
feeding system components.
To perform the inspections it is necessary to use
the special tooling kit for fuel pressure check.
Specific tooling
020480Y Petrol pressure check set
Before disconnecting any fastener, reduce the system pressure.
Detach the electrical connector from the pump support with the engine running, and wait for the shut-
down.
The engine stops at approximately 1.5 bar.
CAUTION
CAREFULLY DETACH THE HOSE TERMINAL PREVENT ANY POSSIBLE SPRAYING INTO THE
EYES.
Injection Nexus 500 euro 3
INJEC - 222
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