Fuel System Fault Analysis Cases
Comprehensive fuel system diagnostics including fuel pump failures, delivery issues, fuel economy problems, and injection system faults.
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2000 Chevy Blazer Code P0452 Diagnostics
2000 Chevrolet Blazer
The owner reports a persistent P0452 EVAP code on their 2000 Chevy Blazer. They have replaced the fuel pump, fixed a previous vacuum leak, and replace...
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1989 Chevy Camaro Fuel Delivery Issue Diagnosis
1989 Chevy Camaro
The owner reports that their 1989 Chevy Camaro won't pass gas to the fuel filter. They have replaced the fuel pump, fuel filter, and fuel pump relay, ...
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1986 Ford F-150 Rough Idling Diagnosis
1986 Ford F-150
The owner reports that their 1986 Ford F-150 with a 302 V8 engine is experiencing rough idling. Initially, the issue included stalling at stoplights, ...
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1990 Ford Crown Victoria Trouble Codes 42 & 92 Analysis
1990 Ford Crown Victoria
The owner installed a 1990 Ford 5.0L 302 EFI engine in a 1941 Ford with a C-4 automatic transmission. After rebuilding the engine and replacing all se...
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1990 Geo Storm Power Loss Diagnosis
1990 Geo Storm
The owner of a 1990 Geo Storm reports a loss of power while driving. The vehicle has been experiencing performance issues, particularly noticeable dur...
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1996 Ford F-250 Fuel Injector Issues and Diagnostics
1994-1997 Ford F-250
The owner of a 1996 Ford F-250 with a 7.3L diesel engine reports intermittent no-start conditions and reduced power. The owner has tested fuel pressur...
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1992 Subaru Loyale Fuel Pump System Diagnosis
1992 Subaru Loyale
The owner reports that after replacing the fuel pump and relay, the fuel system on their 1992 Subaru Loyale wagon still does not operate. They suspect...
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Gas fumes in passenger compartment when A/C on
2003 Saturn Ion
The owner of a 2003 Saturn Ion reports a strong gasoline smell entering the passenger compartment specifically when the air conditioner is on. They me...
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Poor Gas Mileage and Engine Vibration Diagnosis
2000 Toyota Celica
The owner of a 2000 Toyota Celica reports significantly poor gas mileage and excessive engine vibration, especially noticeable while idling at stoplig...
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1989 Ford Bronco Won't Fire - Electrical Diagnosis
1989 Ford Bronco
The owner reports that their 1989 Ford Bronco won't start. The engine cranks but does not fire. Previous attempts to diagnose the issue included check...
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1995 Oldsmobile Ciera Fuel Pump Power Issue
1995 Oldsmobile Ciera
The owner reports that the fuel pump is not receiving power. After checking the wiring to the pump and the fuse, the owner confirmed that power is pre...
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1998 Jeep Wrangler Fuel Pump Diagnosis
1998 Jeep Wrangler
The owner replaced the fuel pump and sending unit on their 1998 Jeep Wrangler due to a code for bad fuel level. After the replacement, the vehicle won...
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2007 Honda Civic A/C Intermittent Cooling Issue
2007 Honda Civic
The owner reports that the A/C in their 2007 Honda Civic intermittently blows hot air instead of cold. When functioning properly, the A/C blows cold a...
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1991 Pontiac Firebird Fuel Pump Stays On
1991 Pontiac Firebird
The owner reports that the fuel pump in their 1991 Pontiac Firebird continues to run even when the ignition key is removed. They have already checked ...
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1991 Buick Skylark V6 3300 Won't Run Diagnosis
1991 Buick Skylark
The owner reports that their 1991 Buick Skylark with a V6 3300 engine won't run after sitting for two years. The car cranks but immediately shuts off....
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Vapor Lock Issue on 1940 Ford with Chevy 502 Engine
1940 Chevrolet 502 Engine
The owner of a 1940 Ford Deluxe with a Chevy 502 crate engine is experiencing stalling issues when the engine temperature gauge reads 195-200°F. Despi...
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1987 Chevy Blazer Fuel Delivery Issue
1987 Chevrolet Blazer
The owner reports that their 1987 Chevy Blazer was initially not delivering fuel to the engine. After replacing the fuel pump, fuel flow was restored,...
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1998 Chevy Blazer Stalling and Sputtering Issues
1998 Chevy Blazer
The owner of a 1998 Chevy Blazer reports experiencing intermittent stalling while driving and during warm-up periods. The vehicle does not completely ...
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