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Step 1
Learn about the possible problems fuel injectors can cause. A dirty fuel injector can cause fuel line problems such as misfiring, hard starting, stalling and hesitation. If you are experiencing any of these symptoms, the fuel injectors may be causing the problems.
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Step 2
Listen for the problems mentioned above and for other possible problems. If there are other sounds, like clanging or high idling, the problem may be something other than the fuel injector. Stick to the obvious symptoms in Step 1 to diagnose a fuel injector problem.
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Step 3
Check for the engine to crank. If it cranks but does not start, the likely problem can be narrowed down to the fuel pump, wiring circuit or pump relay. Bad injector relays could also be the cause. Check to see if the fuel pump runs when cranked; if so, the problem lies in the injectors themselves.
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Step 4
Clean the fuel injectors and examine them for excessive wear and damage. It is important to keep fuel injectors working properly. If you do, they will last you an incredible long time.
