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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1999 GMC Sonoma Engine Performance Issues
1999 GMC Sonoma
The vehicle owner describes ongoing performance issues with their 1999 GMC Sonoma. Despite visiting two different repair shops, the vehicle continues ...
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Excess Gas in Cylinder Head Diagnosis for Mazda 626
1998-2002 Mazda 626
The vehicle owner reports an issue with excess gasoline in the cylinder head of a Mazda 626. Previous repairs included fixing the head, replacing the ...
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2003 Audi A4 Engine Power Fades Under Load
2003 Audi A4
The owner of a 2003 Audi A4 2.0L petrol model reports that the engine power fades while driving, particularly when the engine exceeds 2000 RPM. The ve...
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Smoke from Engine Near Silver Component
1995 Geo Prizm
The owner of a 1995 Geo Prizm reports that the brake pedal is slowly sinking to the floor, prompting the addition of brake fluid, which has temporaril...
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1996 Plymouth Voyager Won't Fire After Repair Attempts
1996 Plymouth Voyager
The owner reports that their 1996 Plymouth Voyager with a 3.3L engine was initially running fine but began stalling and then died completely. The vehi...
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1996 Toyota Camry Backfiring Diagnosis
1996 Toyota Camry
The owner recently reassembled the engine after fixing the transmission. The car started backfiring, and while the timing belt is correctly installed,...
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Speedometer Malfunction in 1968 Ford Mustang
1968 Ford Mustang
The owner of a 1968 Ford Mustang with a 200ci 6-cylinder engine reports that the speedometer is not functioning correctly. The speedometer needle does...
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1997 Saturn Alarm Malfunction Diagnosis
1997 Saturn unknown
The owner of a 1997 Saturn reports that while all functions of the vehicle work, including the engine starting, the factory alarm system is not functi...
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2004 Pontiac Grand Am Stalling Issue
2004 Pontiac Grand Am
The owner reports that their 2004 Pontiac Grand Am with a 3600 V6 engine has been hard to start lately and requires keeping the RPMs up to prevent sta...
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Cadillac Concours Oil Pan and Valve Cover Gasket Repair
1997-2002 Cadillac Concours
The vehicle owner is inquiring about the necessity of removing the transmission to replace the oil pan gasket and valve cover gasket on their Cadillac...
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Setting Timing Belt on 1989 Honda Civic LX 1.5L
1989 Honda Civic
The owner of a 1989 Honda Civic LX 1.5L is seeking guidance on how to properly set the timing for the timing belt. They are particularly interested in...
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K&N Cold Air Intake Installation for 2000 Toyota Solara
2000 Toyota Solara
The vehicle owner is inquiring about the feasibility of installing a K&N cold air intake system on their 2000 Toyota Solara with a 2.2L 4-cylinder eng...
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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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2001 Daewoo Nubira Head Valve Replacement Procedure
2001 Daewoo Nubira
The owner has already removed the cylinder head from the 2001 Daewoo Nubira and possesses a valve spring compressor. However, they are struggling to a...
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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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Chevy Small Block Engine Knocking Issue
1973 Chevrolet C/K Pickup
The owner has a 1973 Chevy truck that was stored for about 1.5 years. Upon attempting to start the engine, it started knocking. After removing the val...
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Coolant Contamination in Oil - 2001 Chrysler Concorde
2001 Chrysler Concorde
The owner reports that while driving, the power steering failed, the brakes became hard, and smoke began to emerge from the engine. Upon inspection, m...
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Loud Grinding Noise from Saturn SL2 Timing Cover
1999 Saturn SL2
The owner reports a very loud vibrating and grinding sound from the Saturn SL2, suggesting a possible issue with the power steering pump. However, the...
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