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 Stalling and No-Start After Warming Up
1991 Acura Integra GS
The owner of a 1991 Acura Integra GS reports that the vehicle starts and runs for a short period before stuttering and eventually stalling. After it d...
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1994 Buick LeSabre Power Steering Fluid Lines Diagnosis
1994 Buick LeSabre
The owner reports that the power steering fluid lines on their 1994 Buick LeSabre are leaking. The leak appears to be coming from the high-pressure li...
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1993 Dodge Dynasty Alarm Reset Issue
1993 Dodge Dynasty
The owner of a 1993 Dodge Dynasty reports that the factory-installed alarm was activated and had to disconnect the battery to turn it off. After recon...
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2005 Dodge Ram 1500 Starting Issues and Gear Indicator Lights
2005 Dodge Ram 1500
The owner reports that recently the dashboard gear indicators light up as if the truck is in all gears when starting. When the brake is applied and th...
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1992 Mercedes Benz 560SEL Power Loss and Gauge Fluctuation
1992 Mercedes Benz 560SEL
The owner reports experiencing power loss in their 1992 Mercedes Benz 560SEL, accompanied by fluctuating meter readings on the dashboard. These sympto...
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2005 Kia Optima Power Loss Diagnosis
2005 Kia Optima
The owner reports that their 2005 Kia Optima sputters and jumps when cranking, with a tendency to die in reverse and sometimes in drive. Acceleration ...
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1990 Nissan Stanza Crank No Start Diagnosis
1990 Nissan Stanza
The owner describes their 1990 Nissan Stanza as having run fine one day but failing to start the next. Despite replacing the starter, solenoid, rotor,...
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2005 Cadillac STS Throttle Problem Diagnosis
2005 Cadillac STS
The owner reports that when accelerating by pressing the gas pedal, the vehicle slows down instead of speeding up. They suspect the issue may be relat...
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Starter Location and No-Start Diagnosis for 1990 Lexus LS400
1990 Lexus LS400
The owner of a 1990 Lexus LS400 V8 reports that after driving, the vehicle fails to restart for approximately three hours, indicating a possible elect...
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1994 Saturn SL1 Cruise Control Diagnosis
1994 Saturn SL1
The owner of a 1994 Saturn SL1 reports that the cruise control system is inoperative. They have noticed this issue primarily during highway driving wh...
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A/C System Not Functioning - 1993 Buick Riviera
1993 Buick Riviera
The A/C service light is illuminated in a 1993 Buick Riviera. The owner checked all fuses and found only the cigarette lighter fuse blown, which was r...
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2005 Dodge Truck Won't Start - Diesel Engine Issue
2005 Dodge Truck
The owner reports that their 2005 Dodge Diesel Truck starts fine in the morning but struggles to start later in the day. It cranks over but doesn't fi...
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1992 Buick Roadmaster Power Window Issues
1992 Buick Roadmaster
The driver side power windows in the 1992 Buick Roadmaster do not operate when the control is pressed, while the passenger side windows function prope...
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1990 Ford Tempo Lurching and Loss of Power Diagnosis
1990 Ford Tempo
The owner of a 1990 Ford Tempo with a 2.3L 4-cylinder engine is experiencing sudden lurching and loss of power while driving. This issue began on Sept...
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1992 Chevrolet Corsica Rough Idling and Speedometer Issues
1992 Chevrolet Corsica
The owner reports a rough idle that feels like the engine might stall when stopped at lights or stop signs. The issue has not yet led to the engine dy...
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1993 Ford Aerostar Won't Crank - Diagnostic Analysis
1993 Ford Aerostar
The owner recently purchased a 1993 Ford Aerostar and replaced the starter, battery, and fuel filter. The vehicle was cranking and driving fine yester...
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1993 Chevrolet Truck Surging Idle Diagnosis
1993 Chevrolet K1500
The owner has a 1993 Chevrolet K1500 with a 5.7L TBI engine experiencing surging idle, fluctuating between 350 and 1000 RPM at all temperatures. They ...
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1992 Cadillac Deville Stalling and No Start Issue
1992 Cadillac Sedan Deville
The owner has a 1992 Cadillac Sedan Deville with a 4.9L engine and approximately 190,000 miles. After a long drive, the car suddenly died while drivin...
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