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 Cadillac El Dorado Stalling Issue Diagnosis
1994 Cadillac El Dorado
The owner reports that the 1994 Cadillac El Dorado runs well for several days but suddenly stalls when the accelerator is pressed, resulting in a loss...
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Power Steering Hose Leak Diagnosis and Repair
2006 BMW X5
The owner of a 2006 BMW X5 4.4i noticed oil leaking from hoses connected to the power steering reservoir marked 'ATF OIL ONLY.' This issue was identif...
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1990 Subaru Legacy Injector Power Issue Diagnosis
1990 Subaru Legacy
The owner reports that their 1990 Subaru Legacy was running with a misfire. After using a scope to listen to the injectors, it was found that two of t...
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Oil Type Recommendation for 2006 Saturn Ion
2006 Saturn Ion
The owner of a 2006 Saturn Ion 2 is inquiring about the suitability of using Fred's SAE 20W-50 premium motor oil in their vehicle. They are confused a...
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2006 Subaru Liberty Engine Noise Diagnosis
2006 Subaru Liberty
The vehicle owner recently replaced the power steering pump due to a loud rattling noise from the engine when accelerating. However, the noise persist...
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1996 Pontiac Grand Prix Intermittent Stalling Issues
1996 Pontiac Grand Prix
The owner reports that their 1996 Pontiac Grand Prix SE with a 3.1L V6 engine intermittently stalls while driving. The stalling occurs suddenly withou...
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2001 Buick Century Ignition Issue with Code 1374
2001 Buick Century
The owner reports a hard starting issue with their 2001 Buick Century, experiencing a rough idle and operation once started. At times, the engine runs...
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Intermittent RPM Fluctuation After Throttle Body Replacement
1994 Ford Probe
The owner recently replaced the throttle body on their 1994 Ford Probe due to low idle issues that caused the engine to die while driving. After the r...
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1994 Ford Taurus Oil Pressure Light Diagnosis
1994 Ford Taurus
The owner of a 1994 Ford Taurus is experiencing an oil pressure warning light illuminated on the dashboard. Despite the light being on, the engine is ...
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1995 Lincoln Continental Does Not Start
1995 Lincoln Continental
The owner reports that their 1995 Lincoln Continental was running perfectly until it was turned off. Upon attempting to restart the next morning, the ...
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1997 Ford Escort Engine Power Loss on Right Turns
1997 Ford Escort
The owner of a 1997 Ford Escort reports experiencing significant engine power loss during right turns. The issue occurs intermittently, particularly w...
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2005 Dodge Neon Engine Knock Diagnosis
2005 Dodge Neon
The owner of a 2005 Dodge Neon SXT reports an engine knock occurring during acceleration, but no noise is present at idle. The vehicle shows no troubl...
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2003 Ford Taurus Won't Start After Stopping
2003 Ford Taurus
The owner reports that the 2003 Ford Taurus starts fine when cold but fails to start after being turned off for a short period, such as when running e...
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1989 Ford Probe No Spark Diagnosis
1989 Ford Probe
The owner reports that their 1989 Ford Probe has no spark despite performing several actions. They confirmed that the relays are functioning as they c...
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1997 GMC Jimmy Ignition Switch and Check Engine Light Issues
1997 GMC Jimmy
The owner of a 1997 GMC Jimmy reports that the check engine light intermittently illuminates. To reset the light, they remove the ECM battery fuse, wh...
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Intermittent Misfire and Oil Pressure Issues in 98 GMC 1500
1998 GMC 1500
The owner reports an intermittent service engine light on their 1998 GMC 1500 with a 5.7L Vortec engine, approximately 98,000 miles. The vehicle shows...
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1998 Jeep Grand Cherokee Won't Start - No Spark or Gauges
1998 Jeep Grand Cherokee
The owner of a 1998 Jeep Grand Cherokee with 104,000 miles reports that the vehicle will crank but not start. Battery has been charged, but there is n...
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Intermittent Stalling at Stops - Jeep Cherokee
2000-2005 Jeep Cherokee
The owner reports that their Jeep Cherokee turns off when coming to a stop at traffic lights. The RPMs drop from about 500 to 0 before the engine stal...
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