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 Mitsubishi Endeavor Exhaust Smell & Transmission Issue
2005 Mitsubishi Endeavor
The owner reports a rotten egg smell from the exhaust when the air conditioner is on, especially noticeable after turning off the vehicle, and occasio...
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Intermittent Stalling and No-Start Issues
2006 Pontiac Grand Prix
The owner of a 2006 Pontiac Grand Prix reports that the vehicle suddenly dies without warning while driving. The engine cranks but does not start afte...
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2005 Buick Terraza Hard Cold Start Diagnosis
2005 Buick Terraza
The owner of a 2005 Buick Terraza reported difficulty starting the vehicle in cold conditions. The issue appeared to occur primarily in colder weather...
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2005 Dodge Rumble Bee Stalling and RPM Fluctuation Issues
2005 Dodge Rumble Bee
The owner reports that their 2005 Dodge Rumble Bee experiences stalling when coming to a stop, with RPMs dropping significantly. When the vehicle is c...
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Intermittent Stuttering During Acceleration
2009 Saturn Aura
The owner reports that the 2009 Saturn Aura with a 2.4L engine experiences stuttering while gently accelerating, particularly noticeable between 45-75...
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2007 Hyundai Sonata Intermittent P0018 Code Diagnosis
2007 Hyundai Sonata
The owner of a 2007 Hyundai Sonata with 30,000 miles reports intermittent P0018 codes appearing without noticeable effects on driving performance. The...
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2006 Suzuki Forenza Blue Smoke Issue Under Load
2006 Suzuki Forenza
The owner of a 2006 Suzuki Forenza reports that the vehicle, which runs well without knocking or missing, has started to emit significant blue smoke i...
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Engine Hesitation and Misfire Diagnosis on 2005 Ford Escape
2005 Ford Escape
The owner of a 2005 Ford Escape reports experiencing hesitation while driving in overdrive, particularly after the engine has warmed up. The check eng...
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2007 Chevy Avalanche High Idle Diagnosis
2007 Chevrolet Avalanche
The owner of a 2007 Chevy Avalanche reports a high idle condition after cleaning the throttle position sensor (TPS) in response to a P0121 code. The c...
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2008 Dodge Dakota Passenger Window Issue
2008 Dodge Dakota
The owner reports that the passenger side power window of their 2008 Dodge Dakota rolls down but does not roll back up. They have reversed the motor l...
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2010 Dodge Charger Rough Idle Diagnosis
2010 Dodge Charger
The owner of a 2010 Dodge Charger SXT with 48,000 miles reports a rough idle characterized by a slight vibration felt in the seat while at a stoplight...
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Compatibility Check for 5.7L Hemi Engine Swap
2007 Jeep Grand Cherokee
The owner has a 2007 Jeep Grand Cherokee Overland with a damaged 5.7L Hemi engine. They found a used engine from a Dodge Magnum 5.7L Hemi but have no ...
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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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2005 Saturn L300 Timing Belt Inquiry
2005 Saturn L300
The owner of a 2005 Saturn L300 is inquiring whether their engine has a timing belt or a timing chain. They also want to know how to determine if the ...
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1993 Toyota Cressida Sticking Power Window Diagnosis
1993 Toyota Cressida
The owner reports that the power window on their 1993 Toyota Cressida sticks and does not operate smoothly. The window can go halfway up but then stop...
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1993 Dodge Caravan No Start Diagnosis
1993 Dodge Caravan
The owner reports that their 1993 Dodge Caravan lost all ignition power while driving, leading to a complete failure to start. Currently, the gauges a...
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2006 Ford Freestar Popping Noise and Stalling Issue
2006 Ford Freestar
The owner reports a popping noise near the air intake of their 2006 Ford Freestar, which also experiences stalling or attempts to stall when not given...
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1993 Mazda 626 Won't Start - Comprehensive Analysis
1993 Mazda 626
The owner of a 1993 Mazda 626 reports that the vehicle will not start. It cranks over normally, and there is a good spark at the plugs, but the engine...
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