2003 Mazda B4000 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Mazda B4000
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2003 Mazda B4000 ProblemsCrank but No Start Condition and No Fuel Pressure
If the engine cranks but does not start, it may be caused by a tripped inertia switch. Switch the key to "ON" and the fuel pump should be heard running for a second or two. Listen at the gas filler if necessary. The inertia switch is located on the firewall and can be tripped when the parking brake is set too hard and then released. The inertia switch should be reset, and will click when it is reset.
The engine may fail to start due to an electrically shorted sensor. Some of the sensors may internally short and not blow any fuses. A technician may find no spark and no operation of the fuel injectors in the diagnosis. One way a technician may isolate the defective sensor is by disconnecting sensors one by one to see if the engine starts.
A dirty, or contaminated mass airflow sensor (MAF) can cause the engine to run poorly. The Check Engine Light may or may not illuminate. MAF sensor related fault codes P0102 and/or P0103 may be stored. In some cases, carefully cleaning the sensor element will fix the problem. If not, replacement of the sensor may be required.
2003 Mazda B4000 QuestionsI need to know what size belt to by pass ac compressor. (1 answer)
My a/c bearing is bad. I want to by pass the a/c compressor pully. I will replace the a/c in a few months. The truck is a manual and it is stalling and making a loud noice.