Symptom Diagnosis

WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.

Symptom checks cannot be used properly unless the problem occurs while vehicle is being tested. To reduce diagnostic time, retrieve DTCS from PCM. Ensure QUICK TEST in SELF-DIAGNOSTICS - VILLAGER article has been performed before diagnosing a symptom. Symptoms available for diagnosis are as follows:

ROUGH OR ROLLING IDLE, STALLS, MISSES, HESITATION OR SURGE
HARD START/LONG CRANK
NO-START/NORMAL CRANK
SLOW RETURN TO IDLE
FAST IDLE, DIESELS/RUNS ON
LOW/SLOW IDLE OR STALLS/QUITS ON DECELERATION
BACKFIRES
LACK/LOSS OF POWER
SPARK KNOCK
POOR FUEL ECONOMY
EMISSIONS COMPLIANCE
HISSING SOUND WHEN REMOVING FUEL CAP
EXCESSIVE FUEL ODOR
WARNING INDICATOR LIGHTS
AUTOMATIC TRANSAXLE UPSHIFT, DOWNSHIFT & ENGAGEMENT CONCERNS
HIGH OIL CONSUMPTION
COOLING SYSTEM CONCERNS - ENGINE OVERHEATING
COOLING SYSTEM CONCERNS - ENGINE RUNS COLD
EXHAUST SMOKE OR SMELL
FUEL SYSTEM CONCERNS - ODOR
ENGINE NOISE
CLIMATE CONTROL - LACK OF COOLING, A/C ALWAYS ON OR A/C DOES NOT CUT-OFF UNDER WOT