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 Kia Injector Problem Diagnosis
1998 Kia Sephia
The owner reports their 1998 Kia Sephia runs fine when cold but stalls after about 10 minutes of warm-up at idle. It restarts immediately but dies wit...
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1991 Ford Explorer No Spark Diagnosis
1991 Ford Explorer
The owner reports that while driving their 1991 Ford Explorer, the vehicle suddenly shut off and would not restart. Now at school for auto class, they...
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2009 Toyota Yaris Intake Air Temperature Sensor Analysis
2009 Toyota Yaris
The owner of a 2009 Toyota Yaris is experiencing issues related to the intake air temperature sensor. They discovered that the vehicle does not have a...
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1995 Dodge Intrepid No Start Diagnosis
1995 Dodge Intrepid
The owner's 1995 Dodge Intrepid with a 3.5L engine and approximately 175,000 miles suddenly died. There is fuel pressure, and the ignition coil checks...
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2000 Lincoln Continental Stalling Issues Diagnosis
2000 Lincoln Continental
The owner reports that their 2000 Lincoln Continental has been stalling while driving, particularly in the morning when accelerating. After a stall, t...
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Intermittent Engine Whine Diagnosis
unknown Pontiac unknown
The owner reports a constant electric whine sound coming from under the hood of their Pontiac. The noise increases in intensity when turning the vehic...
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1994 Buick LeSabre Power Steering Fluid Lines Diagnosis
1994 Buick LeSabre
The owner reports that the power steering fluid lines on their 1994 Buick LeSabre are leaking. The leak appears to be coming from the high-pressure li...
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Intermittent Horn Blast When Starting 2001 Audi TT
2001 Audi TT
The owner reports that after replacing the rack and pinion in their 2001 Audi TT, the horn intermittently blasts when starting the car. They are conce...
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Intermittent RPM Fluctuation and Stalling in 1988 Toyota Supra
1988 Toyota Supra
The owner reports that their 1988 Toyota Supra struggles to maintain a steady RPM, fluctuating between idle and 2000 RPM. They replaced the air manifo...
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1999 Lincoln Town Car Firing Order and Cylinder Identification
1999 Lincoln Town Car
The owner is trying to identify the firing order and which cylinder is number 5 on their 1999 Lincoln Town Car. They have recently replaced the spark ...
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1986 Toyota Camry No Fire to Plugs Diagnosis
1986 Toyota Camry
The owner reports that their 1986 Toyota Camry lost power while driving, began bucking, and then died without restarting. Previous checks included rel...
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1977 Jeep CJ7 Turn Signals Not Functioning
1977 Jeep CJ7
The owner reports that the turn signals on their 1977 Jeep CJ7 are completely non-functional. While the tail lights and parking lights work fine, the ...
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1996 Buick Park Avenue Oil and Coolant Leak Diagnosis
1996 Buick Park Avenue
The owner reports that the 1996 Buick Park Avenue has engine oil mixing with coolant, and coolant is leaking from the upper intake manifold only when ...
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Ignition Key Won't Turn Due to Steering Lock
2001 Saturn L100
The owner of a 2001 Saturn L100 experienced a situation at the gas pump where the ignition key would not turn. The steering wheel was locked with limi...
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1992 Buick Century Limited Stalling and Restarting Issues
1992 Buick Century
The owner reports that the 1992 Buick Century Limited starts fine but experiences jerking during driving, followed by the temperature light turning on...
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2003 Dodge Intrepid Timing Issue Diagnosis
2003 Dodge Intrepid
The owner recently replaced the water pump and timing chain on their 2003 Dodge Intrepid with a 2.7L engine. After the repair, the vehicle starts but ...
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1996 Ford Contour Rough Idle and Starting Issues
1996 Ford Contour
The owner reports that their 1996 Ford Contour runs very rough and requires some gas to start. Once started, the engine shakes violently at idle and p...
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1999 Dodge Caravan High Idle Speed on Start Up
1999 Dodge Caravan
The owner reports that after changing the spark plugs on their 1999 Dodge Grand Caravan with a 3.3L engine, they are experiencing a high idle speed, r...
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