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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1985 BMW 325 Engine Stalls When Warmed Up
1985 BMW 325
The vehicle runs well in the morning but stalls and sputters when the engine reaches around 150 degrees Fahrenheit. The owner has replaced the coolant...
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1995 Acura Integra Poor Acceleration After Radiator Replacement
1995 Acura Integra
The owner reports that their 1995 Acura Integra starts and idles normally but experiences severe lag when attempting to accelerate. The vehicle only r...
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1999 Volvo S70 Hard Starts Diagnosis
1999 Volvo S70
The owner reports hard starting issues with their 1999 Volvo S70. Initially replaced the oxygen sensor and mass air flow meter after a P1142 code was ...
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2000 Dodge Intrepid Won't Crank Over Diagnosis
2000 Dodge Intrepid
The owner reports that their 2000 Dodge Intrepid won't crank over. The ignition switch may be faulty, as the vehicle only starts intermittently when m...
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2005 Subaru Forester Low RPM Vibration Diagnosis
2005 Subaru Forester
The owner of a 2005 Subaru Forester reports a noticeable vibration occurring at low RPM, particularly when stopped or moving slowly (under 3-4 mph). I...
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2002 Mazda Tribute Uphill Weak Power Diagnosis
2002 Mazda Tribute
The owner reports that their 2002 Mazda Tribute runs well except when driving uphill, where it fails to accelerate effectively. They have noticed that...
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Timing Marks for 2010 Hyundai 1.6 DOHC Timing Belt Replacement
2010 Hyundai 1.6 DOHC
The vehicle owner is attempting to replace the timing belt on a 2010 Hyundai 1.6 DOHC engine. They have set the crankshaft to top dead center (TDC) an...
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2007 BMW 530i Catalytic Converter Performance Issue
2007 BMW 530i
The owner reports an engine performance issue related to the catalytic converter on their 2007 BMW 530i. They mentioned that they sent the exhaust man...
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1977 Dodge 440 Engine Pinging Diagnosis
1977 Dodge 440
The owner reports that their 1977 Dodge 440 engine experiences severe pinging after warming up, especially noticeable after driving about 10 miles. Th...
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Intermittent Stalling Issue in 1997 Dodge Caravan
1997 Dodge Caravan
The owner reports that the 1997 Dodge Caravan runs well for a while but then behaves as if it has run out of fuel. To reset it, the owner disconnects ...
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1990 Lincoln Continental Won't Start Diagnosis
1990 Lincoln Continental
The owner reports that their 1990 Lincoln Continental will not start. They replaced the battery a year ago, but now the vehicle shows no signs of star...
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Harmonic Balancer Removal Issues on 2006 Kia Sportage V6
2006 Kia Sportage
The owner is attempting to remove the harmonic balancer on a 2006 Kia Sportage with a V6 engine. They report that there are no threads on the balancer...
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2002 Mazda Protege5 Intermittent Starting Problem
2002 Mazda Protege5
The owner of a 2002 Mazda Protege5 reports intermittent starting issues. The vehicle sometimes makes an attempt to start when the key is turned, but i...
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1992 Plymouth Acclaim High Idle Issue Diagnosis
1992 Plymouth Acclaim
The owner reports that their 1992 Plymouth Acclaim idles too fast, behaving as if the gas pedal is pressed even when parked. They mention being able t...
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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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Smoke and Stalling Issue in 1992 Chevy Cavalier
1992 Chevrolet Cavalier
The owner of a 1992 Chevy Cavalier Z24 with a 3.1 MPFI engine reports persistent loping and stalling problems. Despite replacing the fuel pressure reg...
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2009 Nissan Drive Belt Change Instructions
2009 Nissan Other Models
The vehicle owner is seeking written instructions for changing the drive belt on a 2009 Nissan model. They have received guidance on how to use the au...
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2005 Subaru Forester Excessive Oil Consumption Diagnosis
2005 Subaru Forester XT
The owner reports excessive oil consumption in their 2005 Subaru Forester XT with 135,000 miles. They've owned the car since new, maintaining it dilig...
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