Engine System Fault Analysis Cases
Comprehensive collection of engine system fault analysis cases. Get detailed diagnostic solutions for starting issues, performance problems, ignition system faults, and cooling system failures.
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2001 Isuzu Trooper Engine Stalls with A/C On
2001 Isuzu Trooper
The owner reports that the 2001 Isuzu Trooper runs fine until the air conditioning is turned on. At that point, the vehicle may initially run well but...
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Locating Air Compressor Relay on 2003 Lincoln Navigator
2003 Lincoln Navigator
The owner of a 2003 Lincoln Navigator is experiencing frustration trying to locate the air compressor relay. They looked behind the passenger headligh...
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96 Chevy S-10 Cranks but Won't Start
1996 Chevrolet S-10
The owner of a 1996 Chevy S-10 reports that the vehicle cranks but does not start. It will start if gas is added to the carburetor and will run after ...
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1995 Pontiac Grand Prix Won't Start After Repairs
1995 Pontiac Grand Prix
The owner reports that their 1995 Pontiac Grand Prix SE (3.1L V6) has not started since October. After some repairs, including checking the timing, re...
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Low Idle and Stalling After Flooded Streets
2005 Honda Accord
The owner of a 2005 Honda Accord 2.4L reports experiencing low idle at cold start, around 600-700 RPM, which leads to stalling after warming up. The i...
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1991 Chevy S-10 No Start When Hot
1991 Chevrolet S-10
The owner reports that their 1991 Chevy S-10 with a 4.3L engine starts normally when cold but fails to start when hot. They noted that fuel is not inj...
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Engine Stalls After Minor Collision
SE 4-door Jeep Cherokee
The owner reports that after a minor collision with another vehicle, their Jeep Cherokee SE 4-door starts but will not stay running unless the acceler...
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Speedometer Malfunction After Radio Installation
1997 Chevrolet Cavalier
The owner reports that after installing an aftermarket radio in their 1997 Chevy Cavalier, the speedometer stopped working. They discovered a wire in ...
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2002 Honda Civic Slow to Start Diagnosis
2002 Honda Civic LX
The owner reports that their 2002 Honda Civic LX is slow to start after turning the key. The engine turns over but does so slowly. A dealer previously...
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1998 Chevrolet K1500 Truck Won't Start Intermittently
1998 Chevrolet K1500
The owner describes intermittent starting issues with their 1998 Chevrolet K1500 pickup equipped with a 5.7L engine. Initially, the truck would occasi...
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Intermittent Starting Issues When Warm
1973 Buick Centurion
The owner of a 1973 Buick Centurion with a 455 engine reports that the car starts without issue when cold. However, after running and warming up, star...
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1999 Oldsmobile Intrigue Power Window Electrical Issue
1999 Oldsmobile Intrigue
The owner of a 1999 Oldsmobile Intrigue reported that the power windows are not functioning. They checked the window fuse, which appeared to be good, ...
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1996 Chevy Cavalier Idling Issues After Warm-Up
1996 Chevrolet Cavalier
The owner describes that the 1996 Chevy Cavalier with a 2.2 OHV engine starts and idles normally until it warms up. Once it enters closed loop operati...
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1997 Buick Park Avenue Security System Issue After Engine Swap
1997 Buick Park Avenue
The owner swapped the engine from a 1999 Buick Park Avenue Ultra into a 1997 Buick Park Avenue Ultra, but the vehicle won't start due to the key secur...
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No Spark Issue Diagnosis for 1991 Lincoln Town Car
1991 Lincoln Town Car
The owner reports a no-spark condition in their 1991 Lincoln Town Car after it sat unused for about 8 months during body work. They replaced the coil ...
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1989 GMC C3500 Engine Won't Start After Thermostat Replacement
1989 GMC C3500
The owner replaced the thermostat on their 1989 GMC C3500, but now the engine won't start. They reported that after the thermostat installation, the e...
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1998 Ford Ranger Persistent Idle and Power Issues
1998 Ford Ranger
The owner reports that their 1998 Ford Ranger with a 2.5L 4-cylinder engine idles roughly and exhibits low idle speeds, nearly stalling. After startin...
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2000 Acura Integra Throttle Cable Grounding Issue
2000 Acura Integra
The owner of a 2000 Acura Integra reports issues after an engine swap. When turning the key, the RPMs spike to 8, and the throttle cable heats up, pre...
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