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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1988 Pontiac Sunbird Intermittent Dying at Startup
1988 Pontiac Sunbird
The owner reports that their 1988 Pontiac Sunbird has been experiencing intermittent issues at engine startup. Sometimes the engine will start and idl...
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Ford Motorhome Backfiring and Loss of Power Diagnosis
1995 Ford Other Models
The owner has a 1995 Ford motorhome with a 460 motor that experienced backfiring and power loss after about 15 miles of driving. It idled fine but str...
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1998 Buick Lesabre Engine Stopped Running Diagnosis
1998 Buick Lesabre
The owner reported that while driving, the engine check light illuminated, and the engine began to perform poorly. Previously, the vehicle had no issu...
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O2 Sensor Adjustment for 1979 Jeep CJ5
1979 Jeep CJ5
The owner of a 1979 Jeep CJ5 with a carbureted engine is experiencing performance issues related to the O2 sensor located in the exhaust just past the...
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1995 Jaguar XJ6 Overfilled with Oil and Grinding Noise
1995 Jaguar XJ6
The vehicle owner reports their 1995 Jaguar XJ6 was overfilled with oil, resulting in potential damage to engine seals. Initially, there was a grindin...
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2004 Ford E-Series Van Vibration Diagnosis
2004 Ford E-Series Van
The owner reports a severe vibration in the steering wheel of their 2004 Ford E-Series Van occurring between 2000-2100 RPM or at 72 MPH. The vibration...
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Intermittent Engine Whine Diagnosis
unknown Pontiac unknown
The owner reports a constant electric whine sound coming from under the hood of their Pontiac. The noise increases in intensity when turning the vehic...
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1996 Dodge Caravan Won't Start After Multiple Repairs
1996 Dodge Caravan
The owner reports that their 1996 Dodge Caravan has been experiencing starting issues after multiple repairs over the past three months. The check eng...
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2003 Chevy Impala Stalling, Rough Idle, Misfire
2003 Chevrolet Impala
The owner reports that their 2003 Chevy Impala experiences consistent stalling after about ten minutes of driving. Restarting is difficult; it only re...
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High Idle Speed Issue Diagnosis for 1987 Mazda Truck
1987 Mazda Truck
The owner reports that after warming the engine to normal operating temperature, the idle speed doesn't settle down below 1100-1200 RPM. They suspect ...
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1999 Ford Windstar Check Engine Light Issue
1999 Ford Windstar
The owner reports that the Check Engine light and brake light on their 1999 Ford Windstar remain illuminated. Despite the car running normally, it fai...
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1996 Plymouth Breeze Cruise Control Engine Stall Issue
1996 Plymouth Breeze
The owner reported that the 1996 Plymouth Breeze experiences engine stalling after the cruise control is engaged for a while. The issue first appeared...
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2002 Jaguar XK8 Intermittent No-Start Condition
2002 Jaguar XK8
The owner reports that their 2002 Jaguar XK8 intermittently stops running and fails to start. Despite having a new battery and replacing the starter s...
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1998 Jeep Cherokee Rough Idle & Engine Dying Issues
1998 Jeep Cherokee
The owner reports that their 1998 Jeep Cherokee is experiencing rough idling and occasional engine stalling. These symptoms occur intermittently, with...
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1989 Mercedes Benz 300SL Intermittent Hot Start Issues
1989 Mercedes Benz 300SL
The owner reports intermittent hot starting issues with their 1989 Mercedes Benz 300SL. The problem occurs mainly after the vehicle has been driven an...
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2000 Oldsmobile Alero Misfire and Exhaust Smoke Issues
2000 Oldsmobile Alero
The owner reports thick white smoke from the exhaust that smells like gasoline, with significant loss of power when accelerating. The engine shakes, e...
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2000 Nissan Maxima Engine Knocking and Pinging Issues
2000 Nissan Maxima
The owner reports that their 2000 Nissan Maxima GLE experiences engine pinging and knocking noises during normal acceleration, similar to a diesel eng...
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Valve Cover Replacement for 2000 Dodge Stratus
2000 Dodge Stratus
The owner noticed engine misfiring that started as a minor issue but worsened at high speeds. Upon inspecting the spark plugs, they found the wells fi...
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