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If your vehicle uses a fuel injection system, a fuel pump (FP) is needed to send gasoline from the gas tank to the injectors. It also needs to apply the right amount of pressure in order for your engine to operate efficiently. An insufficient amount of pressure results in too little fuel in the combustion chamber. That leads to a lean mix, which can cause misfires and stalls. Too much pressure, on the other hand, will 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, it must deliver a sufficient volume of gasoline. Like all components, the fuel pump can eventually fail to work properly. This article will provide a few suggestions for troubleshooting and fixing the problem.

When Your Engine Refuses To Start

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

If the ignition system is fine, inspect the timing belt; you may need to remove a cover in order to see it. If the belt appears fine, crank the engine to make sure it turns. If it does, that usually means there's sufficient compression.

If you can rule out your vehicle's ignition system and the level of compression, the only other explanation is insufficient fuel. At this point, the goal is to figure out whether the pump is the problem.

A lack of sufficient fuel can be traced to the pump, the fuel filter (which can be clogged), or a pressure-related issue. Pressure can be affected by a blockage somewhere in the fuel line or too little voltage being received by the pump.

Checking The Pump

Have a friend turn the key in the ignition to crank your engine. While he or she is doing so, listen for the fuel pump being engaged (you'll hear a dampened buzzing sound). Normally, when the key is turned, the powertrain control module (PCM) engages the FP for a few seconds to build pressure. If your engine starts, the FP would continue to operate. In the event your engine refuses to start, the PCM would turn the FP off.

If you are unable to hear the pump working for the first few seconds after cranking your engine, the component has likely died; it will need to be replaced. But suppose you can hear a buzzing sound as the part is engaged. That suggests the problem involves a lack of pressure.

How Much Pressure And Volume Is Being Produced?

Checking the level of pressure generated by your car's fuel pump may require several different tests. These include static, residual, running, and dead head pressure tests. Each procedure requires a special gauge, which is used to assess the amount of pressure in various circumstances. For example, a running fuel pressure test is done while the engine is idling. A residual pressure test is performed several minutes after the engine has been turned off.

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

If you determine that the FP has indeed failed, you'll need to install a replacement. Doing so can be expensive. The pump may cost nearly $250 and the labor can cost another $150 or more. Avoid cutting corners with this part. Use an OEM-certified replacement to ensure it lasts for years.

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Whats the procedure to setting the valve gap on a generator?

Honda EB3800 I seem to recall something about removing the spark plug,insert a probe to know when the piston is in the Intake or exhaust position by pulling gently on the recoil rope..Which is the exhaust& Intake position? i know to loosen small nut then use a feeler guage for settings.. Im told settings are In..15th & Ex. .20th Am I close to knowing how to do this? Thank You in advance! Medeepdiver

It sounds like you are trying to find top dead center (TDC) and then you are trying to reset the valve lash or change out the cam. Your method would and does work, but a much quicker way is to simply look at the engine itself. There should be a harmonic balancer on it and the timing cover (or the engine itself) should have a mark on it to indicate TDC. I'm not really familiar with that particular generator.

As far as adjusting the valve lash itself, there will be an adjustment nut on each valve when you finally tear the head down enough to get to the cam. Since I don't know what you are doing or what the settings should be on that motor, I'm of little help here.

http://ecomodder.com/forum/showthread.php/diy-setting-valve-lash-honda-sohc-motors-949.html

1989 Jeep Grand Wagoneer Not sure. from North America - Comments
When I first got it, I had to replace the brakes, my power steering pump was leaking, and the gaskets form my roof rack leaked. It throws oil. I had a blow out with really bald tires. I had to replace the head liner. Driver side window came off of the track.

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