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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1994 Mazda 626 Rough Running and Stalling Issues
1994 Mazda 626
The owner reports that the 1994 Mazda 626 with a 2.0 V-6 engine has been running rough and missing, especially when the A/C is on. The vehicle shuts o...
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1985 Oldsmobile Cutlass Power Steering Belt Issue
1985 Oldsmobile Cutlass
The owner reports difficulty with the power steering system in their 1985 Oldsmobile Cutlass. They mention that there's a noticeable struggle when ste...
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AC Not Blowing Cold After Stereo Install
2005 Toyota Tacoma
The owner recently installed a new stereo in their 2005 Toyota Tacoma, which required removing the AC control unit. After reinstalling everything, the...
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2000 Kia Sportage - Intermittent No-Start Condition
2000 Kia Sportage
The owner reports that the 2000 Kia Sportage sometimes won't start. The problem occurs intermittently, with no consistent pattern. Previous checks hav...
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Voltage Regulator Location and Diagnosis
1989 Plymouth Reliant
The vehicle owner is seeking information on the location of the voltage regulator in a 1989 Plymouth Reliant with 78,000 miles. They are unsure whethe...
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1991 Chevy Beretta Power Loss When Hot
1991 Chevrolet Beretta
The owner reports that the 1991 Chevy Beretta idles well but experiences severe power loss and cutouts once it reaches normal operating temperature du...
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Speedometer Connection Issues After Engine Swap
2006 Ford Focus
The owner converted a 2006 Ford Focus 2.0 to a 2.3 Lincoln MKC turbo 5-speed. During the conversion, the speed control and AC were removed due to inco...
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Intermittent Starting Issues After Distributor Replacement
1990 Acura Integra
The owner of a 1990 Acura Integra 1.8 with a 5-speed transmission reported starting issues after driving through a deep puddle, which fouled the distr...
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2006 Hyundai Santa Fe White Smoke on Cold Start
2006 Hyundai Santa Fe
The owner of a 2006 Hyundai Santa Fe reports a cloud of white smoke during cold starts in the morning. The smoke lasts for a few seconds and has a die...
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1993 Chevy Blazer Towing and Driveshaft Concerns
1993 Chevrolet Blazer
The owner has a 1993 Chevy Blazer S10 RWD and needs to tow it cross-country using a tow dolly with the front wheels off the ground. They are unsure wh...
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2013 Ford Edge Illuminated Door Sill Plates Installation Issue
2013 Ford Edge
The owner is attempting to install illuminated door sill plates purchased from Ford. The installation instructions indicate tying into a gray/violet w...
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Ignition Coil B Location Inquiry for 2007 Lexus RX350
2007 Lexus RX350
The owner of a 2007 Lexus RX350 is inquiring about the location of ignition coil B, specifically for cylinder #2, after receiving a check engine light...
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Power Outlet Malfunction Diagnosis for 2005 Acura TSX
2005 Acura TSX
The owner of a 2005 Acura TSX reports that both power outlets in the vehicle are not functioning. Initially suspected a blown fuse and replaced it. Af...
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2011 Acura TL Squeaky/Chirping Noise After Oil Change
2011 Acura TL
The owner reports a chirping noise that started after a differential oil change at a shop. The sound resembles a timing belt chirping but is confirmed...
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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 GMC Sierra High Idle After Throttle Body Cleaning
2007 GMC Sierra
The owner reports a check engine light that was addressed by cleaning the throttle body, which improved engine performance. However, the idle speed is...
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2005 Chevy Tahoe Metal Shavings in Engine
2005 Chevrolet Tahoe
The vehicle owner recently took their 2005 Chevy Tahoe for an oil change. During the process, metal shavings were discovered both in the engine oil an...
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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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