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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2002 Toyota Landcruiser Cranks but Won't Start
2002 Toyota Landcruiser
The owner reports that their 2002 Toyota Landcruiser occasionally cranks but fails to start, with occurrences happening at least once a month. The veh...
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2002 BMW 525 Engine Smoke Diagnosis
2002 BMW 525
The owner reported that after an oil change, their 2002 BMW 525 began emitting a significant puff of white-blue smoke from the exhaust upon accelerati...
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Engine Misfire and Shaking Diagnosis for 2004 Chevy Cavalier
2004 Chevrolet Cavalier
The owner reports that their 2004 Chevy Cavalier makes a funny sound and shakes upon starting, as if it wants to stall but doesn’t. After having the s...
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Stalling in Cold Weather Conditions
2001 Nissan Maxima
The owner reports that their 2001 Nissan Maxima experiences stalling issues specifically in cold weather conditions. There have been no warning lights...
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Speedometer Malfunction in 1968 Ford Mustang
1968 Ford Mustang
The owner of a 1968 Ford Mustang with a 200ci 6-cylinder engine reports that the speedometer is not functioning correctly. The speedometer needle does...
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1989 Dodge Daytona Starting Issue Analysis
1989 Dodge Daytona
The owner reports that their 1989 Dodge Daytona does not want to start, particularly in cold weather. A recent tune-up was performed without issues. H...
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1994 Dodge Spirit White Smoke on Acceleration
1994 Dodge Spirit
The owner reports that their 1994 Dodge Spirit runs well except when idling for more than a minute. During this time, it emits white smoke from the ta...
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2001 Oldsmobile Bravada Cranks but Won't Start
2001 Oldsmobile Bravada
The owner reports that their 2001 Oldsmobile Bravada cranks but does not start. They mentioned that when gas is added directly into the throttle body,...
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Oil Pressure Fluctuation Diagnosis on 1997 Ford Explorer
1997 Ford Explorer
The oil pressure gauge on my 1997 Ford Explorer has been fluctuating between a low reading and the middle of the gauge for the past six months. A prev...
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1998 Chevy Lumina 3.1L Cuts Out When Accelerating
1998 Chevrolet Lumina
The owner describes a 1998 Chevy Lumina 3.1L that starts fine after sitting for a few days but cuts out severely when accelerating. The vehicle strugg...
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Intermittent Stalling Issue on 2001 Chevy Camaro
2001 Chevrolet Camaro
The owner reports that their 2001 Chevy Camaro starts well but shuts off within 10 to 20 seconds. They have tried holding the RPM at 3000 but the engi...
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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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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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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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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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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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