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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1994 Pontiac Grand Am Engine Noise and Oil Pressure Fluctuation
1994 Pontiac Grand Am
The owner recently purchased a 1994 Pontiac Grand Am for their grandson, finding that the engine had been disassembled but not properly repaired. The ...
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1993 Cadillac El Dorado Intermittent Stalling Issue
1993 Cadillac El Dorado
The owner describes an intermittent stalling issue with their 1993 Cadillac El Dorado. The vehicle sometimes restarts after cutting out, but other tim...
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1991 Toyota 4Runner Won't Start - Diagnostic Analysis
1991 Toyota 4Runner
The owner of a 1991 Toyota 4Runner V6 reported that after a weekend of heavy driving, the vehicle wouldn't start the next morning. The engine cranks b...
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1992 Saturn SL1 Hard Starting and Idle Issues
1992 Saturn SL1
The owner reports that the 1992 Saturn SL1 with a 1.9L engine has a hard starting issue, regardless of temperature. The vehicle requires the accelerat...
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Fuel Cutoff Light On, Engine Won't Start
1994 Ford Probe
The owner describes that after the car sat idle for over two years, they replaced the timing belt, water pump, fuel and air filters, and added fresh f...
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1992 GMC Jimmy No Electrical Power Diagnosis
1992 GMC Jimmy
The owner reports that their 1992 GMC Jimmy has no power to the electric windows, fan blower, and dash instrument panel. They have checked all fuses a...
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1993 GMC C1500 No Fire Issue Analysis
1993 GMC C1500
The owner reports that their 1993 GMC C1500 shut down unexpectedly while driving and failed to restart afterward. They have checked the ignition fuse,...
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1991 Mazda B2200 Pickup Excessive Smoke at Startup
1991 Mazda B2200
The owner of a 1991 Mazda B2200 Pickup with a 2.2L four-cylinder engine reports excessive smoking upon startup, persisting for at least 15 minutes of ...
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1994 Chevy Cheyenne Exhaust Leak Diagnosis
1994 Chevrolet Cheyenne
The owner of a 1994 Chevy Cheyenne with a 5.7L engine reports an exhaust leak after replacing the driver side exhaust manifold without using a gasket....
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1990 Toyota 4Runner Low Idle Speed Issue
1990 Toyota 4Runner
The owner reports that the idle speed of their 1990 Toyota 4Runner starts at about 800 RPM but drops to 500 RPM when the engine heats up. This low idl...
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1993 Plymouth Laser Engine Lurches When Cold
1993 Plymouth Laser
The owner has a 1993 Plymouth Laser with a 1.8L engine and a 5-speed manual transmission. After replacing the transmission due to a hole causing loss ...
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1991 Jeep Cherokee Rough Idle and MAP Signal Fault
1991 Jeep Cherokee
The owner of a 1991 Jeep Cherokee with a 4.0L automatic transmission went off-roading and took on water. After initially running rough for 5 minutes, ...
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1992 Pontiac Sunbird Tensioner Pulley Removal Diagnosis
1992 Pontiac Sunbird
The owner of a 1992 Pontiac Sunbird SE with a 3.1L V6 reported that the vehicle was misfiring and running poorly, akin to only firing on five cylinder...
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1992 Pontiac Sunbird Sputtering and Acceleration Issues
1992 Pontiac Sunbird
The owner reports that their 1992 Pontiac Sunbird experiences sputtering when accelerating, unable to exceed 20 mph even with the gas pedal fully pres...
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1990 Jeep Laredo Rear End Jerking Issue
1990 Jeep Laredo
The owner reports that the 1990 Jeep Laredo drives smoothly when accelerating gently. However, when they apply more throttle, the rear end jerks viole...
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1994 Mazda Miata White/Grey Smoke on Initial Take Off
1994 Mazda Miata
The owner's 1994 Mazda Miata emits a puff of white or grey smoke during initial take off from a stop. This occurs intermittently after the engine has ...
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1992 Chevy Truck Loss of Power Diagnosis
1992 Chevrolet Truck
The owner reports that their 1992 Chevy Truck is experiencing a significant loss of power, with rough idling and occasional stalling. The vehicle back...
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2008 Mitsubishi Lancer Water Leak Diagnosis
2008 Mitsubishi Lancer
The vehicle owner reports water leaking from the front driver's side of the car. Upon inspection, the leak appears to be coming from a hole located ce...
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