TROUBLESHOOTING
FUEL INJECTION SYSTEM
Engine does not start Cranking speed too low Repair starting system or charge or
replace battery so that engine
cranks at a minimum of 150 rpm.
No voltage at glow plug bus If test light shows no voltage at bus
with key at "ON" position, test relay
Glow plug faulty Test and, if necessary, replace glow
Injection pump not delivering fuel If no fuel emerges from a loosened
injection pipe during cranking,
check timing belt and fuel supply
Injection pipes misconnected
Connect pipes in correct location
Injection timing incorrect
Faulty injection Check and, if necessary, replace
Engine mechanical faults, as described
earlier under this heading
Test compression and, if necessary,
Faulty injection pump Try to start engine with new pump
installed. If necessary, replace
Idle speed incorrect or
idle rough or irregular
Loose fuel hose between filter and
Tighten, if necessary, and repair.
Air in fuel system Bleed fuel system.
Inadequate fuel supply owing to clogged
fuel filter, or fuel return line and injection
pipes leaking, dirty, kinked, or squeezed
Inspect and, if necessary, replace
lines and hoses or replace fuel filter
Faulty injection Check and, if necessary, repair or
replace injection injectors.
Injection timing incorrect
Engine mechanical faults, as described
earlier under this heading
Test compression and, if necessary,
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