Question about 1997 BMW 318

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Fuel consumbtion i have BMW 523i 1997 the fuel consumption is very high and when i refill the tank it starts to leak from i dont where the previous owner for the car changed the fuel pump,so i think ther is aproblem assmbling the fuel pum any body help me to disasimble and assimble the fuel pump correctly?

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Hey, I read an article about this. Your BMW may be suffering from any one of nine of these causes, including bad spark plugs. See the list and explanations:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Uses_Too_Much_Gas.htm

Posted on May 25, 2009

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Why dose my b m w 523i 1997 boil when i have replaced the radiator water pump thermo stat all hoses it pushes the water back into the coolant tank and no oil in the engine


You will need to bleed the system of air .It will boil over after refill .Let it do this leave it cool down over night ,top up next morning .You have air in the system you need to purge it .of air air..And In you hand book it will tell you how to go about it. Dont let it get to hot it will warp the cylinder head..

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I have a 3s 2000cc egine, the problem is high fuel consumption. Imagin 1lt only going for 6km. Please help.


Hi there,

As you have not stated the vehicle MODEL or Year of Manufacture, I will provide a 'general' solution:

There could be numerous causes for high fuel consumption, but if you have used this amount of fuel in such a short journey, there would have to be leaking fuel somewhere.

However, the only true method to measure "ACTUAL" fuel consumption (disregard trip computer) is:

- Completely fill tank to a pre-determined point inside the fuel tank filler tube.
- Set your cluster Trip Meter to: 0000
- Drive vehicle for 6 - 15km and return back to the same gas station pump used previously.
- Completely fill tank to the same point inside the fuel tank filler tube, where filled previously.
- Note the quantity of litres required to fill to that same point in the filler tube.
- Divide the litres used, by the total Km travelled on your Trip Meter.
- If the value calculates less than 20 (carburettor engine); less than 15 (EFI engine), then consumption is acceptable.

Note: if value is above these numbers, then you have a fuel leak, or a problem with your vehicle's carburettor adjustment. EFI engines can have numerous causes, including electronic sensor faults etc.

Cheers,

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Will the Pioneer AVH-P3100DVD fit the 1997 bmw 523i e39


Yes, I just installed one today. You will have to remove the tape deck and the 6 disk changer to make it fit.

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1 Answer

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My 1997 bmw 523i has an off on hissing and pumping sound every time i try to start it. i replaced the fuel pump and filters and even cleaned the fuel lines but the pumping sound is still there.


Every time you turn the ignition key on the fuel pump is activated and will make a humming sound. This is totally normal. If it is not a "hummmmmmmm" sound than you should have a mechanic look at it.

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50 miles reduction in the conditions mentioned means that your economy is about right
there is a small hose back from the tank to under the cap to release air trapped when filling
koses can get loose , crack or break
tank sender units gaskets can break down
look around the tank area for the leak /smell
a damp patch in the dust is a good give away

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ok the fuel in your tank is expanding and vaporising constantly, because you live in such a warm climate it pressurises the tank too much and the cap vents, you could try a new cap, but honestly unless you are feeling light headded when you pull up to the lights cause of all the fumes i wouldnt worry, just dont block the breather youll pop your tank.

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