Question about 1995 Chevrolet Blazer

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When start my car, it will run in good condition, after 10 to 15 Minutes , I am hearing the sound of fuel pump, become noisy, when i put the headlight or ac on, the sound of fuel pump become different, during running the engine stop slowly, some time the engine will not run, then start the engine again, the car work well, after sometime the problem will come again,my e/mail is ghazi389@hotmail.com

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Change the fuel pump, is bad,

Posted on Aug 05, 2009

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C230 2005 will not start


If it fails to turn over then check on battery condition and on battery connections (do full beam headlights stay consistently bright for ten minutes). If Ok then check on wiring to and from starter motor and on condition of starter motor brushes. If turning over can you hear the fuel pump running; whirring sound when key at position prior to 'start'. If no fuel pump check on fuse for pump relay, check on relay, check on voltage at pump. If pump supplied with voltage but not running give it knock to see if you can get some kind of response from it. If completely dead replace pump and filter assembly.

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How do you start a engine of a 97 Buick Century Limited after its been flooded?


Your car has an electric fuel pump installed the gas tank. Pressing the gas pedal does not bring gas into the engine like the cars fitting with mechanical pumps connected to the engine.

To start your car after running out of gas, simply turn the key from the "Off" position to the "Run" position. You should hear the pump running (whirring / buzzing sound) for 5 seconds or so if you listen closely; then return the key to the "Off" position. Repeat this 3, 4 or 5 times to allow the pump to prime and flood the all the fuel lines, filter, etc. between the tank and engine.

If you can not hear the pump, have someone crouch down low near the tank while your turn the key (remember - only turn from the "Off" to the "Run" position - not all the way to the "Start" position each time). If they can not hear the pump, the fuse for the pump may have blown. Check your manual for the location of the fuel pump fuse and replace if bad. If still not hearing the pump, it may have failed when you ran out of gas as the fuel in the tank acts as a coolant for the pump. If this is the case, the pump will needed to be replaced.

Finally, you may have luck rapping sharply on the exposed tank with a rubber mallet of block of wood (do NOT use a steel hammer or tool as any spark could be disasterous) when the pump should be running. If the pump is simply hung up on sediment, etc. the vibrations *may* cause enough movement to allow the debris to become dislodged - allowing the pump to run once again.

I hope this helps and good luck!

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one good way to check that the fuel pump is running to listen. take the gas cap of and put you ear the the fuel tank fill neck. have a freind turn the key from the off position to the on position, but do not start the crank the engine over. you should hear a huming or wizzing sound for a few short moments. if you hear that sound the pump is running and more thatn likely pumping fuel.

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The fuel pump on my 1988 crown victoria runs constantly when the engine is running and pump is very noisy. When i turn the key on, the pump runs then stopps but runs constantly when engine is running. Why?


The fuel pump is supposed to run constantly when the engine is running. It is pumping fuel to the engine which is in constant need of fuel. It is starting when the ignition is turned on and then shuts down after a few seconds if you do not start the engine. This is exactly what it is supposed to do. You have no problem except for the pump being noisy. On a car that is 22 years old, I would suspect the fuel pump is failing and the noise you hear is it's death nil. Change the fuel filter and if the noise continues be prepared to have the pump replaced. It may fail suddenly or it may become hard to start. If you have never had it replaced just go ahead and do so, to prevent being stranded and a towing fee when it does fail.

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sounds like your fuel pump has retired on you,running you car low on gas is hard on pump,they are cooled by the gas an are lubercated by the gas, I hope this helps you

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That noisy pump bothers me, and that's why I question if it's not breaking down once it gets warm/hot, and starts feeding low fuel pressure. Personally, I'd confirm that first before beating my head against the wall, and finding out it was that all along.

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I would advise diagnosing this problem when its in this no-start condition. I would not overlook ignition problems and the loss of spark as modules can break down and stop working once heated up,then work again once cooled off. Key on engine off will run the fuel pump for 3 seconds and you can hear the fuel pump running.I generally get concerned if it sounds abnormal like louder and whining which means the pump is failing.Bottom line this engine needs air/fuel/spark to run so check for these items while in the no start condition...good luck

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Yes, if you got a good ear. It is common to hear the fuel pump running without the engine. The running sound should come from directly over the fuel tank like it's almost underneath the rear sear. If it is abnormally noisy, ie you can hear it over the engine running, I suggest you install a new fuel pump. This one is probably headed for a failure soon in that case. Regards, Doug

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