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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Intermittent Starting Issue on 2000 Saturn SC2
2000 Saturn SC2
The owner reports intermittent starting issues with a 2000 Saturn SC2. Initially, the vehicle would not start at all, leading the previous owner to se...
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2002 Pontiac Firebird Headlamp Door Module Diagnosis
2002 Pontiac Firebird
The owner reports that when turning off the headlamps, the headlamp door motors continue to run for approximately six seconds. This results in a loud ...
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2000 BMW 740 Oil Smoke on Startup Diagnosis
2000 BMW 740
The owner of a 2000 BMW 740 reports that the vehicle smokes heavily during startup, with oil found on the spark plugs and in the boot. This issue aros...
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1997 Chevy Blazer Not Starting Intermittently
1997 Chevrolet Blazer
The owner of the 1997 Chevy Blazer reports intermittent starting issues. The starter engages, but the engine does not fire. During these no-start occu...
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Brake Pedal Hard to Push and Engine Noise
1994-2004 Chevrolet S10
The owner reported that while driving their Chevy S10, they encountered a hard brake pedal that wouldn't depress when attempting to make a right turn....
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Intermittent Stalling and No Start Condition
1991 Honda Prelude
The owner has a 1991 Honda Prelude with 175,000 miles and a 2.05L fuel-injected engine. They experienced a loss of power while driving, with a top spe...
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Power Steering Difficulty in Cold Weather
2002 Nissan Sentra
The owner of a 2002 Nissan Sentra reports that the power steering feels heavy, especially in cold weather. The issue improves as the car warms up. The...
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2005 Mercedes Benz C240 Engine Not Starting Diagnosis
2005 Mercedes Benz C240
The owner reports that their 2005 Mercedes Benz C240 4MATIC does not crank or roll over, although all dashboard lights illuminate normally. The fan op...
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Oil Pump Replacement Diagnosis for 2007 GMC Yukon XL
2007 GMC Yukon XL
The owner of a 2007 GMC Yukon XL with 90,000 miles reports decreasing oil pressure and a ticking noise from the engine. Further investigation revealed...
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2001 Ford Explorer Cylinder Firing Issue
2001 Ford Explorer
The owner reports a problem with one cylinder on their 2001 Ford Explorer that has spark and fuel but will not fire. Compression checks out at 150 psi...
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2006 Chrysler Town and Country P2308 Code Diagnosis
2006 Chrysler Town and Country
The owner of a 2006 Chrysler Town and Country with a 3.3L V6 engine reports a check engine light illuminated and a P2308 code indicating an erratic si...
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Honda Passport Revving Problem Diagnosis
1994 Honda Passport
The owner of a 1994 Honda Passport is experiencing a significant performance issue where the vehicle cannot rev past 4000 RPM. When accelerating from ...
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1993 Mazda Protege Engine Vibration Diagnosis
1993 Mazda Protege
The owner of a 1993 Mazda Protege reports persistent engine vibrations starting immediately upon ignition. The vibrations intensify significantly when...
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1997 Ford F-150 Engine Operating Parameters Analysis
1997 Ford F-150
The owner of a 1997 Ford F-150 is inquiring about engine operating parameters after noticing that the engine is showing a 20% load at idle and an abso...
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1997 Chevy Suburban Random Multiple Misfire Diagnosis
1997 Chevy Suburban
The vehicle owner reports a random multiple misfire in their 1997 Chevy Suburban with a 5.7L engine. They have replaced the injectors, spark plugs, wi...
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2004 Toyota Corolla A/C Moisture Issue Diagnosis
2004 Toyota Corolla
The owner reports sudden moisture coming from the A/C vents of their 2004 Toyota Corolla, particularly during operation in high temperatures. The mois...
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Timing Issue with 1995 VW Passat GLS 2.0
1995 Volkswagen Passat GLS
The owner has a 1995 VW Passat GLS with a 2.0L engine that runs well but stumbles between 2500 to 3000 RPMs. They noticed the timing mark is about hal...
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Toyota Hilux Surf Cranks but Doesn't Start
1990-1997 Toyota Hilux Surf SSR-G
The owner reports that their Toyota Hilux Surf SSR-G cranks but does not start, despite having replaced the batteries with two new ones and installing...
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