Air Conditioning Problems Analysis Cases

Analysis of AC system failures, cooling problems, and HVAC performance issues.

Oil Pump Replacement Diagnosis for 2007 GMC Yukon XL
2007 GMC Yukon XL
The owner of a 2007 GMC Yukon XL with 90,000 miles reports decreasing oil pressure and a ticking noise from the engine. Further investigation revealed...
oil pump low oil pressure engine noise
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1997 Chevy Suburban Random Multiple Misfire Diagnosis
1997 Chevy Suburban
The vehicle owner reports a random multiple misfire in their 1997 Chevy Suburban with a 5.7L engine. They have replaced the injectors, spark plugs, wi...
Chevy Suburban misfire
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1997 Ford F-150 Black Smoke at Idle Diagnosis
1997 Ford F-150
The owner recently purchased a 1997 Ford F-150 with a 4.6L V8 engine and noticed a faint amount of black smoke at idle. The vehicle has had its cataly...
Ford F-150 Black Smoke
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1990 Honda Accord Driver Side Power Seat Belt Issue
1990 Honda Accord
The owner of a 1990 Honda Accord is facing an issue with the driver side power seat belt, which does not retract. The passenger side works fine. Altho...
Honda Accord power seat belt
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1998 Honda Accord Clunking Noise Diagnosis
1998 Honda Accord
The owner reports a clunking noise from the suspension after recently replacing both front upper control arms, all four struts, and sway bar end links...
suspension clunking noise Honda Accord
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87 Chevy S-10 Truck 2.8 Compression Issue After Gasket Replacement
1982-1993 Chevrolet S-10
The owner recently replaced the intake manifold gaskets on their 1987 Chevy S-10 truck with a 2.8L engine due to a significant leak at the rear. After...
Chevrolet S-10 compression
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1993 Honda Prelude Cooling Fan Diagnosis
1992-1993 Honda Prelude
The owner reports that the radiator cooling fan is continuously running, regardless of whether the air conditioning or heater is in use. The fan remai...
Honda Prelude Cooling Fan
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Fuel Filter Location and Replacement Guidance
1998 Chrysler Concorde
The vehicle owner is trying to locate the fuel filter on their 1998 Chrysler Concorde. They do not see a filter under the car and are uncertain whethe...
fuel_system Chrysler_Concorde maintenance
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1999 GMC Sierra Acceleration Problems and Diagnostics
1999 GMC Sierra
The owner reports that their 1999 GMC Sierra is experiencing acceleration issues. When the gas pedal is pressed, the vehicle sputters and backfires, b...
GMC Sierra acceleration issues
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Engine Light and Heater Issues in Peugeot 307
2001-2008 Peugeot 307
The owner of a Peugeot 307 1.4 petrol reports that the engine management light began flashing upon purchase, indicating issues with the catalytic conv...
Peugeot 307 engine light
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2000 Saturn LS2 Idle Issues After MAF Replacement
2000 Saturn LS2
The owner of a 2000 Saturn LS2 with a 6-cylinder engine reports intermittent low idle after replacing the mass air flow (MAF) sensor. Initially, the M...
Saturn MAF sensor idle issues
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1994 Chevy Lumina Acceleration Hesitation and Stalling
1994 Chevrolet Lumina
The owner reports a 1994 Chevy Lumina with a 3.1L engine and 208,000 miles experiencing significant hesitation and stumbling during acceleration, occa...
Chevrolet Lumina acceleration hesitation PCM issues
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2004 Chevy Tahoe 4WD Actuator Diagnostic
2004 Chevrolet Tahoe
The owner reports intermittent 'service 4WD' light activation on their 2004 Chevy Tahoe. The 4WD system sometimes works, but often it won’t engage whe...
Chevrolet Tahoe 4WD
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Intermittent Stalling While Driving - 95 Infiniti J-30
1995 Infiniti J-30
The owner of a 1995 Infiniti J-30 reports intermittent stalling while driving, particularly when slowing down or turning. The vehicle starts right bac...
Infiniti J-30 stalling
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2005 Chevy Trailblazer Rear Heater Diagnostic
2005 Chevy Trailblazer
The owner reports that the rear heater vents in their 2005 Chevy Trailblazer only blow cold air, while the front heater system works correctly. The en...
Chevy Trailblazer HVAC
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1996 Ford Taurus Engine Light After Cam Sensor Replacement
1996 Ford Taurus
The owner reports that the check engine light illuminated after replacing both cam sensors on their 1996 Ford Taurus. Despite the replacement, the tro...
Ford Taurus camshaft sensor
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1999 Chevy Monte Carlo HVAC Flow Intermittent Issue
1999 Chevrolet Monte Carlo
The owner of a 1999 Chevy Monte Carlo reports intermittent airflow issues from the vents. At times, the airflow diminishes significantly, but it will ...
HVAC blower motor intermittent airflow
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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...
Daewoo rough idle fuel system
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