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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2005 Volkswagen Golf Black Smoke Diagnosis
2005 Volkswagen Golf
The owner reports excessive black smoke coming from the exhaust when accelerating, both in park mode and while driving. This issue became apparent aft...
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1997 Honda Passport LX Knocking Noise Diagnosis
1997 Honda Passport
The owner of a 1997 Honda Passport LX reports a knocking noise from the engine upon startup. The vehicle has 163,000 miles and the owner is unsure of ...
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Rear-End Jerking and Knocking Sound Diagnosis
2006 Chrysler unknown
The vehicle owner reports a persistent jerking and knocking sound coming from the rear end of their 2006 Chrysler, which they purchased in May 2011. T...
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1996 Buick Park Avenue Check Engine Light Diagnosis
1996 Buick Park Avenue
The owner of a 1996 Buick Park Avenue with a 3.8L engine and around 100,000 miles reports that an employee tampered with the car, causing the check en...
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Timing Belt and Water Pump Replacement Recommendation
1998 Dodge Neon
The owner recently purchased a 1998 Dodge Neon coupe with a 2.0L DOHC engine. It has 69,593 miles now, having increased from 67,108 miles since purcha...
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2007 Dodge Magnum Electronic Throttle Control Issue
2007 Dodge Magnum
The owner reports that after driving for a while, the electronic throttle control light activates, followed by the electronic stability program light....
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Intermittent power loss and low RPM on 2005 Renault Espace
2005 Renault Espace
The owner reports that the 2005 Renault Espace has intermittent power issues. Initially, there is no power during starting, but after a few minutes, p...
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2007 Saturn Vue Hybrid U0120 Code Diagnosis
2007 Saturn Vue Hybrid
The owner reports that the 2007 Saturn Vue Hybrid has triggered the U0120 code, indicating lost communication with the starter/generator. The issue ar...
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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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Power Steering and Sensor Issues Diagnosis
2014 Mazda 3
The owner reports that the power steering is not working on their 2014 Mazda 3. They mentioned that after hitting something while driving on ice, the ...
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2005 Mitsubishi Eclipse Intermittent Noise Diagnosis
2005 Mitsubishi Eclipse
The owner reports an intermittent noise coming from the engine area of their 2005 Mitsubishi Eclipse. The noise occurs sporadically and does not happe...
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2007 Honda Civic Alternator Squeal Diagnosis
2007 Honda Civic
The owner reports a squealing noise from the alternator when starting the vehicle in extremely cold temperatures (around 10 degrees). This noise resem...
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2007 Chrysler Pacifica Stalling Issues
2007 Chrysler Pacifica
The owner of a 2007 Chrysler Pacifica reports that the vehicle starts but dies shortly after, unless gas is applied. It is experiencing sputtering dur...
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2011-2013 Honda Odyssey Flasher Relay Diagnosis
2011-2013 Honda Odyssey
The owner of a 2013 Honda Odyssey is experiencing issues with the turn signals and hazard lights not functioning. Despite the parking lights working, ...
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Ignition Key Stuck: Possible Shifter Interlock Issue
2006 Saturn Ion
The owner of a 2006 Saturn Ion is experiencing a problem where they cannot remove the ignition key after turning off the engine. They suspect that the...
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2006 Mazda 3 Idle Problems Diagnosis
2006 Mazda 3
The owner recently purchased a 2006 Mazda 3 with a 1500cc ZY engine and is experiencing idle problems. The vehicle has an electronic throttle body and...
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2010 Toyota Hiace Engine Vibrates and Excessive Smoke
2010 Toyota Hiace
The owner of a 2010 Toyota Hiace D4D reported that while driving, the vehicle sucked water through the intake manifold after encountering a pool of wa...
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2006 Ford Focus Secondary Air System Low Flow Issue
2006 Ford Focus
The owner of a 2006 Ford Focus ZX3 reports issues with the secondary air intake system, specifically receiving error codes for low flow to the left po...
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