Question about 2005 Ford Focus

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After the garage fitted a new petrol pump, the fuel gauge has been inaccurate. It is going back next week for the fouth time. Is it just trial and error, or are they doing something wrong. It is only obvious when I fill up, then they make me wait until it is almost empty before I take it back.

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Sounds Like When They Changed The Pump They May Have Messed Up The Fuel Sending Unit They Are Very Fragile

Posted on Jul 16, 2009


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1 Answer

How can I check the fuel presure in Toyota tacoma engine 2.4

Sorry am not sure whether Tacoma engine is petrol or diesel, what age it is or what fuelling system but assuming it is a conventional petrol injection system, the fuel pressure test is just one of four tests carried out when a problem with fuel delivery is suspected and begins with fitting the appropriate adaptors to the fuel line and then fitting a pressure gauge.

It is not just the correct fuel pressure(s) needed for satisfactory engine performance but also sufficient fuel volume.

Before carrying out the tests is is usually necessary to fit a switch in place of the fuel pump relay so the pump can be started with an open line and the engine switched off. The amount of fuel delivered into an appropriate container in a set time is measured and compared with specs.

The next test is the peak pressure test - a momentary test with a closed fuel line to test the mechanical strength of the pump and lines.

The next test is the regulated pressure test with the fuel line again connected to the engine and the enriched pressure recorded and compared with specs and finally the engine is started or vacuum applied to the regulator valve with a hand pump and the lean or normal pressure is recorded.

With some older engines it is possible to easily install a pressure gauge with universal adaptors but as later engines tend to use quick release fittings an number of special adaptors will be needed.

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How do i check fuel pressure without a gauge

You can't know the correct pressure. But you can get a good idea by removing the return hose from the fuel rail , fit a length of hose to the rail and into a container start the engine, and fuel will flow into the container if the regulator and pump are ok.

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Fuel gauge just stopped working.Had new petrol pump fitted 2 weeks ago. My question is : is their a fuse relating to fuel guage or do I need a new gauge ? I would appreciate some feedback .

There is no separate fuse for the gage--it uses the same power as the others. The fuel level sending unot is integral with your new pump. This leads one to wonder if the new pump has a defect or perhaps was not installed correctly. Let me know if you have more questions.

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Fuel gauge inaccurate & warning light always on.

Hi. the inaccurate fuel gauge is easily fixed by replacing the fuel guage sending unit that is located in the fuel tank. this sending unit sends the appropriate signal the the gauge on the dash. all calculations are configured by the sending unit and if this device is malfunctioning, it will not send an accurate reading to the fuel gauge. simply replacing this device will fix the fuel guage issue you are having at this time.

Concerning the Amp drain after two days. this is caused by some sort of energy drain that can be in a faulty vacuum pump that isn't shutting off or, some sort of defect in the ECM. you could also have a faulty fuel pump relay that isn't shutting of and this will slowly drain energy from the battery within a two day period as well.

You can narrow down the battery drain by using a volt meter(needle) or multimeter. open the fuse box located on the drivers side below the dash. pull the fuse box door and expose the entire fuse box. you will need to pull each individual fuse independently to test if the actual slot is being used with the ignition switch in the off position.

Use the fuse slots contact prongs for testing the current level if any. with the ignition switch off, test all slots for live current feed. each slot that is dead is not affected and you may reinsert the respective fuse but, if you run across a live slot that is receiving a current while the ignition switch is in the off position, this specific slot will be the affected device that is draining the battery.

Test all fuse box slot accordingly. you will find the drain with this procedure.

Please rate and god bless:)

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sounds like the float is either got a hole in it and is full of fuel, or the whole float assembly is seized in the empty position.
was the car left for 5 weeks empty of fuel?

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