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 Chevrolet Caprice Timing Issue Diagnosis
1994 Chevrolet Caprice
The owner describes their 1994 Chevrolet Caprice Classic with an LT1 engine as having run without a water pump and crank pulley. After reinstalling th...
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1994 Toyota A/C Stops Working After 1.5 Hours of Use
1994 Toyota Other Models
The owner reports that the air conditioning system in their 1994 Toyota stops working after about 1.5 hours of driving on a hot and muggy day. Initial...
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1993 Dodge Ram Engine Runs Irregular When Warm
1993 Dodge Ram
The owner reports that their 1993 Dodge Ram runs smoothly when cold but exhibits irregular behavior once warmed up, including hesitation, stalling, an...
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1994 Pontiac Grand Prix Starts but Won't Stay Running
1994 Pontiac Grand Prix
The owner replaced the steering column from a salvage yard, after which the car starts but immediately dies after one second. They noticed the plugs w...
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1990 Dodge Caravan Belt Tensioner Replacement
1990 Dodge Caravan
The owner of a 1990 Dodge Caravan with a 3.3L engine reported that the belt tensioner snapped off completely. They are unsure how to proceed with the ...
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1992 Oldsmobile 98 Starter Not Engaging
1992 Oldsmobile 98
The owner reports that their 1992 Oldsmobile 98 won't start at all. When the ignition is turned on, there are no sounds from the starter—no clicking o...
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Dodge 2.5 Engine Compatibility and Head Gasket Issues
1990 Dodge Daytona ES
The owner has a 1990 Dodge Daytona ES equipped with a 2.5-liter engine, suspecting a blown head gasket. Instead of replacing the head gasket, they are...
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1994 Saturn SL2 Power Window Adjustment Issue
1994 Saturn SL2
The owner replaced the power window assembly in their 1994 Saturn SL2, but now the window does not move up and down evenly, causing it to jump off the...
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1993 Plymouth Colt Idle Surge Diagnosis
1993 Plymouth Colt
The owner of a 1993 Plymouth Colt reports an idle surge occurring after the engine warms up. The idle speed fluctuates between 1100 RPM and 1900 RPM. ...
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1993 Oldsmobile Ciera Engine Will Not Run
1993 Oldsmobile Ciera
The owner reports that the 1993 Oldsmobile Ciera engine will not run despite replacing the fuel filter and the computer. The engine starts only when s...
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1993 Oldsmobile Achieva Engine Performance Issues
1993 Oldsmobile Achieva
The owner reported that after replacing the cylinder head (GMC#24573087 on GMC#24574468), the engine began to run poorly. The first and third cylinder...
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Intermittent Engine Stalling in Gear
1993 Oldsmobile Cutlass Ciera
The owner reports that the engine of their 1993 Oldsmobile Cutlass Ciera runs smoothly in park but stalls when put into gear. The stalling occurs inte...
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1992 Oldsmobile Regency Won't Start Diagnosis
1992 Oldsmobile Regency
The owner reports that their 1992 Oldsmobile Regency will not start, despite the battery being fully charged. All battery connections are clean and ti...
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1992 Chevy S-10 Performance Issues Diagnosed
1992 Chevrolet S-10
The owner of a 1992 Chevy S-10 reports engine performance issues, primarily a lack of power and difficulty starting. The vehicle seemed to improve aft...
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1992 Cadillac Deville Brake and Idle Issues
1992 Cadillac Deville
The owner reports that their 1992 Cadillac Deville's brakes are completely unresponsive, causing the vehicle to accelerate unexpectedly when shifting ...
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1992 Toyota Celica Engine Misfiring After Warmup
1992 Toyota Celica All-Trac
The owner reports that their 1992 Toyota Celica All-Trac with a 2.0L turbo engine experiences misfiring after warming up. This issue has persisted for...
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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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Intermittent Stalling and Backfiring during Shifts
1992 Chevrolet S10
The owner of a 1992 Chevy S10 with a 2.5L engine reports intermittent stalling and backfiring during transmission shifts, particularly from 1st to 2nd...
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