62
Fault Finding
CHART A11—Engine rpm surges
Cause
Remedy
Fuel level low.
Check/fill fuel tank.
If the condition occurs at idle, the idle speed
is set too low for the accessories.
Check the engine idle rpm setting.
Throttle adjustment incorrectly set or
binding.
Check the engine maximum rpm is as specified in the
Technical
Specifications
section. Check the throttle linkages and cable for
binding etc.
Fuel injection lines leaking.
Inspect and correct as required leaks in the high pressure lines,
fittings injector sealing washers, or delivery valves.
WARNING:
Fine jets of fluid can penetrate the skip. Keep face
and hands well clear of pressurised fluid and wear protective
glasses. If fluid penetrates your skin seek medical help
immediately.
Fuel tank cap vent/breather blocked.
Inspect & rectify as required. Replace cap if necessary.
Fuel is aerated.
Check the fuel system for loose connections and possible air
ingress points. Rectify and bleed the fuel system.
One or more injector worn or
malfunctioning.
Check and externally clean the injector. If the problem still
persists, the injector must be checked by a FIE specialist or replace
with new.
Worn or malfunction fuel injection pump
(FIP). Injection pump not delivering fuel.
Check for operation of the FIP.
The FIP must be taken to a local FIE specialist to have the fuel
delivery timing checked. Ensure that all obvious causes have been
eliminated before removing the FIP. (Needs to be, Delphi DP210
capable agent for mechanical engines and for common rail
electronic engines see Delphi agent or JCB dealer
(www.delphi.com or www.jcb.com)
