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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1998 Chevy Lumina Rear Spark Plug Replacement Procedure
1998 Chevrolet Lumina
The owner is seeking guidance on replacing the rear spark plugs in a 1998 Chevy Lumina with a 3.1L engine. They have a Haynes Repair Manual that advis...
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1996 Plymouth Voyager Won't Fire After Repair Attempts
1996 Plymouth Voyager
The owner reports that their 1996 Plymouth Voyager with a 3.3L engine was initially running fine but began stalling and then died completely. The vehi...
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Saturn SL1 EGR Valve and Vacuum Leak Diagnostics
1994 Saturn SL1
The vehicle owner reports an intermittent check engine light that activates occasionally. Upon diagnostic checks, the vehicle was found to have troubl...
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Intermittent Smoke on Startup in 1993 Ford Probe 2.0
1993 Ford Probe
The owner reports that their 1993 Ford Probe 2.0 smokes heavily on startup. They replaced the valve seals with cheaper aftermarket ones from eBay but ...
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2002 Mitsubishi Galant Check Engine Light Diagnostics
2002 Mitsubishi Galant
The owner of a 2002 Mitsubishi Galant is frustrated with a recurring check engine light. The vehicle experienced stalling and has had multiple parts r...
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2000 Hyundai Accent Engine Performance Issue
2000 Hyundai Accent
The owner of a 2000 Hyundai Accent reports that the vehicle frequently revs up unexpectedly, causing erratic engine performance. This issue tends to o...
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No Spark Issue on 1967 Volkswagen Beetle
1967 Volkswagen Beetle
The owner reports that their 1967 Volkswagen Beetle is not starting despite attempts to troubleshoot. They have replaced the fuel pump, spark plugs, a...
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2001 Isuzu Rodeo Random Misfire Diagnosis
2001 Isuzu Rodeo
The owner of a 2001 Isuzu Rodeo with a V6 engine and automatic transmission reports sporadic activation of the check engine light. Each occurrence tri...
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