18
Troubleshooting Guide
GASOLINE VEHICLE - TROUBLESHOOTING
AND ELECTRICAL SYSTEM
GASOLINE POWERTRAIN
_
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Spark plug is partially fouled or in poor
condition
Clean or replace
Spark plug is damaged or loose
Replace or tighten
Incorrect spark plug gap
Adjust gap
Spark plug wire is damaged or loose
Replace or reconnect
Loose or bad wire connection at ignition coil,
EFI sensors, or ECU
Test Procedures 14 –
or 15
or 4 –
Intermittent ignition coil failure
Test Procedures 14 –
and 15
Low fuel level in fuel tank
Refill
Fuel line pinched or clogged
Clean or replace
Poor fuel quality or contaminated fuel
Replace
Fuel pump malfunction; fuel pressure to
throttle body too low
Section 21 — Gasoline Vehicle - Fuel System
Water or dirt in the fuel system and/or throttle
body/fuel injector; dirty or clogged fuel filter
Section 21 — Gasoline Vehicle - Fuel System
Throttle body dirty or improperly adjusted
Clean or adjust. Section 21 — Gasoline
Low cylinder compression
Section 20 — Gasoline Vehicle - Engine
Cylinder head bolts not tighten properly
Check and retighten. Section 20 — Gasoline
Intake or exhaust valve not sealing
Repair. Section 20 — Gasoline Vehicle -
Incorrect valve clearance
Adjust. Section 20 — Gasoline Vehicle -
Vacuum leak
Retighten hardware or replace gasket(s)
Engine does not start easily.
Starter/generator belt is slipping
Belt Tension Adjustment for EFI Engines on
Spark plug is fouled or in poor condition
Section 20 — Gasoline Vehicle - Engine
Spark plug wire is damaged or loose
Section 20 — Gasoline Vehicle - Engine
Intermittent ignition coil failure
Test Procedures 14 –
and 15
Water or dirt in the fuel system and/or throttle
body/fuel injector; dirty or clogged fuel filter
Section 21 — Gasoline Vehicle - Fuel System
Engine starts but does not run smoothly.
Fuel pump malfunction; fuel pressure to
throttle body too low
Section 21 — Gasoline Vehicle - Fuel System
TABLE CONTINUED ON NEXT PAGE
Page 18-4
2019 Precedent Villager 2 Maintenance and Service Manual
Summary of Contents for Precedent Villager 2
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