NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE,
SURGES
ENGINE STALLS/QUITS ACCELERATION/CRUISE
ENGINE RUNS ROUGH ACCELERATION/CRUISE
MISSES ACCELERATION/CRUISE
11
BUCK/JERK ACCELERATION/CRUISE/DECELERATION
HESITATION/STUMBLE ACCELERATION
SURGES ACCELERATION/CRUISE
• Engine stops unepectedly at beginning of acceleration or during acceleration.
• Engine stops unepectedly while cruising.
• Engine speed fluctuates during acceleration or cruising.
DESCRIPTION
• Engine misses during acceleration or cruising.
• Vehicle bucks/jerks during acceleration, cruising, or deceleration.
• Momentary pause at beginning of acceleration or during acceleration
• Momentary minor irregularity in engine output
• A/C system operation is improper.
• Erratic signal or no signal from CMP sensor
• Air leakage from intake-air system parts
• Purge solenoid valve malfunction
• IAC valve improper operation
• EGR valve malfunction
• Erratic signal from CKP sensor
• Low engine compression
• Vacuum leakage
• Poor fuel quality
• Main relay intermittent malfunction
• Throttle body malfunction
• Engine overheating
• Spark plug malfunction
• Improper air/fuel miture ratio control operation
• Improper VTCS operation
• Spark leakage from high-tension leads
• Air cleaner restriction
• PCV valve malfunction
• Improper valve timing due to jumping out timing belt
• Restriction in ehaust system
• Intermittent open or short in fuel body pump circuit
• Inadequate fuel pressure
• Fuel pump mechanical malfunction
• Fuel leakage from fuel injector
POSSIBLE CAUSE
• Fuel injector clogging
• Fuel line restriction or clogging
• Pressure regulator malfunction
• TP sensor misadjustment
• Intermittent open or short of MAF sensor, TP sensor and VSS
• ATX malfunction (ATX)
• Clutch slippage (MTX)
• Improper VTCS operation
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair
procedures. Read the following warnings before performing the fuel system services:
• • • • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always
• • • • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or
• • • • Disconnecting/connecting quick release connector without cleaning it may possibly cause
F204
TROUBLESHOOTING
keep sparks and flames away from fuel.
death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete
"BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this
manual.
(See
F17 BEFORE REPAIR
(See
F17 AFTER REPAIR
Caution
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
PROCEDURE.)
PROCEDURE.)
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