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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2003 Honda Civic VTEC Gutless Acceleration Issue
2003 Honda Civic
The owner of a 2003 Honda Civic EX with a VTEC engine is experiencing gutless acceleration, along with the key light, check engine light, and seat bel...
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1999 Isuzu Rodeo Loud Engine Noise Diagnosis
1999 Isuzu Rodeo
The owner reports that during a road trip, the engine suddenly became very loud, producing a heavy wind sound. This occurs when pressing the accelerat...
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1996 Mazda Protege Rough Idling When Engine is Warm
1996 Mazda Protege
The owner reports that their 1996 Mazda Protege experiences rough idling when the engine is warm. This issue is present regardless of whether the tran...
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1993 Dodge Ram Engine Runs Irregular When Warm
1993 Dodge Ram
The owner reports that their 1993 Dodge Ram runs smoothly when cold but exhibits irregular behavior once warmed up, including hesitation, stalling, an...
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Thermostat Installation Alignment Direction
2001 Nissan Sentra
The owner is replacing the thermostat in their 2001 Nissan Sentra due to a P0128 fault code indicating that the coolant temperature is below the therm...
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1996 Chrysler Concorde High Idle and Sensor Issues
1996 Chrysler Concorde
The owner reports that their 1996 Chrysler Concorde is idling at an excessively high RPM of 2500. They recently replaced the MAP and TPS sensors but s...
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Engine Shaking Diagnosis for 1994 Nissan Sentra
1994 Nissan Sentra
The owner reports that the engine shakes regardless of whether it is cold or warm. The problem persists even after replacing spark plugs and ignition ...
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1997 Chevy S-10 Ignition and Accessory Failures
1997 Chevrolet S-10
The owner reports that their 1997 Chevy S-10 has no warning lights illuminating when the key is turned on. The vehicle can shift gears without pressin...
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1988 Ford Thunderbird Engine Won't Start Diagnostics
1988 Ford Thunderbird
The owner reports that their 1988 Ford Thunderbird will not start. When attempting to crank the engine, there is no response, although the test light ...
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1996 Subaru Outback Won't Start When Hot
1996 Subaru Outback
The owner of a 1996 Subaru Outback with 175,000 miles reports that the vehicle starts reliably when cold. However, after multiple stops and starts dur...
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2005 Chevy Tahoe Metal Shavings in Engine
2005 Chevrolet Tahoe
The vehicle owner recently took their 2005 Chevy Tahoe for an oil change. During the process, metal shavings were discovered both in the engine oil an...
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Suzuki Vitara No Spark Issue After Stalling
1995-2005 Suzuki Vitara
The owner reports that their 1995-2005 Suzuki Vitara with a 2.0L engine stalled while driving and has not started since. They confirmed that there is ...
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1991 Honda CRX Won't Start - Electrical Issue
1991 Honda CRX
The owner reports that their 1991 Honda CRX won't start after washing the engine. The vehicle was running perfectly before the wash. After the wash, t...
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1997 Chevy Lumina 3.1 V6 Rough Start and Smoke Issue
1997 Chevrolet Lumina
The owner reports that their 1997 Chevy Lumina with a 3.1 V6 engine runs roughly at startup and emits a lot of smoke from the tailpipe. The engine doe...
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1994 GMC 1500 Transmission Swap Analysis
1994-1995 GMC 1500
The owner intends to swap the engine, transmission, and transfer case from a 1995 GMC 1500 into a 1994 GMC 1500 pickup. They are seeking guidance on t...
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2001 Jeep Grand Cherokee Laredo Idle Fluctuation Issue
2001 Jeep Grand Cherokee Laredo
The owner of a 2001 Jeep Grand Cherokee Laredo with a 4.0L engine reports an issue where the engine almost stalls when at a stop. Initially, after the...
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1995 Chevy Truck Code 32 Diagnostic Analysis
1995 Chevrolet Pickup
The owner has a 1995 Chevy 454 one-ton pickup that consistently triggers a code 32. They've replaced several components including the MAP sensor, EGR ...
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Volvo Timing Belt Adjustment Guidance
1990 Volvo Wagon
The owner has a 1990 Volvo wagon with a 4-cylinder, single overhead cam engine, which has had a head replacement. They need to set the timing belt cor...
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