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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1989 Cadillac Fleetwood FWD 4.5L Starting Issue
1989 Cadillac Fleetwood
The owner reports that when attempting to start the car, the ignition turns on but the starter only clicks once, and the interior lights dim. After re...
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2004 Volkswagen GTI Rattle at Idle
2004 Volkswagen GTI
The owner describes a 2004 Volkswagen GTI with approximately 60,000 miles that produces a rattling noise resembling a diesel engine at idle. The noise...
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2001 Mitsubishi Galant Intermittent Starting Issues
2001 Mitsubishi Galant
The owner reports that after replacing the valve cover gaskets, oil was discovered near the spark plugs, leading to their replacement as well. Now, wh...
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2001 Daewoo Rough Idle After Sitting
2001 Daewoo unknown
The owner reports that their 2001 Daewoo experiences a rough idle after sitting overnight. The vehicle shakes and stutters significantly, occasionally...
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Intermittent Check Engine Light - P0125, P0141, P1811 Codes
1998 Oldsmobile Intrigue GLS
The owner of a 1998 Oldsmobile Intrigue GLS with 167,000 miles reports that the check engine light illuminated. After taking the vehicle to Firestone ...
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1987 Honda Accord Carbureted Misfire and No Start Issues
1987 Honda Accord
The owner has a 1987 Honda Accord with a carbureted engine that started misfiring occasionally while driving. This issue progressed to misfiring even ...
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2003 Nissan Sentra turns over but will not start
2003 Nissan Sentra
The owner reports that the 2003 Nissan Sentra turns over but does not start. They have confirmed that there is no spark at the plugs and have replaced...
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Starter Failure Diagnosis on 2003 GMC Sierra
2003 GMC Sierra
The vehicle owner reports a starter failure on their 2003 GMC Sierra. Initially, the wire from the solenoid to the starter burnt off, prompting a star...
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Intermittent Power Loss with Flashing Check Engine Light
2003 Jeep Liberty
The owner reports that after replacing the thermostat on their 2003 Jeep Liberty 3.7L V6, the check engine light began flashing and the vehicle experi...
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Brake Issues in 1984 Toyota Van LE
1984 Toyota Van LE
The owner of a 1984 Toyota Van LE reports persistent brake issues despite several repairs. The front brake pads and rear shoes have been replaced, and...
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1996 Acura TL 2.5 Running Rough After Timing Belt Change
1996 Acura TL
The owner reports that their 1996 Acura TL 2.5 is running rough after they changed the timing belt, water pump, and spark plugs. Initially, the vehicl...
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Fuel Gauge and Injector Power Testing on 96 GMC Jimmy
1996 GMC Jimmy
The owner reports intermittent stalling issues with the vehicle, primarily at idle and during slowdowns. The check engine light remains solid, but no ...
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1995 Chevy Engine Compatibility with 1999 Suburban
1999 Chevy Suburban
The owner of a 1999 Chevy Suburban, which has a cracked block, is concerned about the compatibility of a 1995 Chevy engine they purchased as a replace...
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Finding Under Size Connecting Rod Bearings for J20A Engine
2000-2005 Suzuki Grand Vitara
The vehicle owner is facing difficulties in sourcing under size connecting rod bearings for their Suzuki Grand Vitara with a J20A engine. The cranksha...
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1996 Ford Contour Rough Idle and Starting Issues
1996 Ford Contour
The owner reports that their 1996 Ford Contour runs very rough and requires some gas to start. Once started, the engine shakes violently at idle and p...
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2000 Ford Contour Rough Idle and Stalling Diagnosis
2000 Ford Contour
The owner reports that their 2000 Ford Contour with a 2.0L engine is experiencing rough idling, especially when the A/C is on, and it stalls under ful...
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2002 Jeep Liberty: Check Engine Light and Black Smoke
2002 Jeep Liberty
The owner reports that their 2002 Jeep Liberty is experiencing a flashing check engine light, accompanied by black smoke from the tailpipe. The vehicl...
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Toyota Hilux Surf Diesel Engine Bogging Down Issues
1990-1997 Toyota Hilux Surf
The owner of a Toyota Hilux Surf (2.4L diesel) reported that after a mechanic replaced the fuel pump and glow plugs, the vehicle now starts fine. Howe...
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