Heidi Marcum Electronics.

Sound Module

If your vehicle uses a fuel injection system, a fuel pump (FP) is required to send the fuel tank gas to the injectors. It must also apply the right amount of pressure for your engine to operate efficiently. An insufficient amount of fuel pressure results too little in the combustion chamber. This leads to a lean mixture, which can cause misfires and stalls. Too much pressure on the other hand, not to waste gasoline, generate pollution and cause your engine to run rough.

The FP is responsible for two jobs. First, as mentioned, it must deliver fuel under pressure, and it must do so between a certain range. Second, he must deliver a sufficient volume of gasoline. As all components, fuel pump may be failing to function properly. This article offers some suggestions for troubleshooting and problem resolution.

When your engine will not start

When the PS dies, it can prevent your engine from starting (even if it cranks). The problem is, there are other factors that can produce the same result, including issues in the ignition system and engine. To refine the guilty, use spark plug tester (you can buy one at most auto supply stores) to test for spark.

If the ignition system is well to inspect the timing belt, you may need to remove a cover to see it. If the belt looks good, run the engine for sure it turns. If so, it usually means there is sufficient compression.

If you can not exclude ignition system of your vehicle and the compression level, the only other explanation is not enough fuel. At this stage, the objective is to determine if the pump is the problem.

A lack of sufficient fuel can be attributed to the pump, fuel filter (which can be plugged), or a matter related to the pressure. The pressure can be affected by a blockage somewhere in the fuel or too little voltage to be received by the pump.

Pump control

Have a friend turn the key in the ignition to start the engine. Even if he or she is doing, listen for the fuel pump being engaged (you hear a ringing wet). Normally, when the key is turned, the control module powertrain (PCM) is committed in the PS for a few seconds to apply pressure. If your engine starts, the PF would continue to operate. In case your engine fails to start, PCM would turn off FP.

If you can not hear the pump working for the first few seconds after you start your engine, the component has probably been killed, it must be replaced. But suppose you can hear a buzz that the party is engaged. This suggests that the problem implies a lack of pressure.

How much pressure and volume during production?

Controlling the level of pressure generated by pump Fuel your car can take several different tests. These include static, residual, running and testing dead head pressure. Each procedure requires a special gauge that is used to estimate the amount of pressure under different circumstances. For example, a test fuel pressure is running when the engine is idling. A residual pressure test is performed within minutes after the engine has been off.

If the fuel pump to produce a sufficient amount of pressure, it is still possible that it is sending an insufficient volume of gas. For this reason, you may need to do a volume test. This test is performed using a fuel flow meter is connected to the pipe fuel.

If you determine that the PF has indeed failed, you'll need to install a replacement. This can be costly. The pump can cost nearly $ 250 and labor can cost another $ 150 or more. Avoid cutting the corners of this part. Use a certified OEM replacement to ensure it lasts for years.

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