Question about 1991 Yamaha FZR 250 R

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Fuel system is not complete.

We need a diagram to see what is missing

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Http://www.manualz.info/ try here for a manual


hope this helps

Posted on Jan 07, 2009

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No juice going to fuel pump


Are you having more than one issue? With engine cranking, if no fuel pump, no fuel injector pulse--and no spark at the plugs, I usually check for missing rpm signal. These system may operate a little differently depending on year-- make and model.

What is your year--make--model?

As far as checking fuses, your owners manual should tell you what fuses for fuel pump and or fuel pump relay and where fuses are located. Your fuel pump needs voltage and ground. If you want me to post a wiring diagram, I need year--make--model, only vehicles sold in the US.

Click on the comment link for diagram. The gray wire carries voltage to fuel pump, when relay is energized. You see the ecm bat fuse, not only check the fuse, check the fuse circuit for voltage, hot all the time.

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2005 ford focus, the car will start and run for a few seconds then stop. The fuel pump does not come on


Are you missing anything else?
Engine cranking, do you have spark at the plugs and fuel injector pulse? The reason I ask, if your missing all three, have to check for rpm signal, comes from crank sensor.
As far as just the fuel pump, could be the pump--voltage and or ground circuit--could be problem with inertia switch--fuse.
Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader.
I don't think it is your security system, my info says your security system will disable starter motor among other components. Make sure battery has a full charge.

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1 Answer

Looking for fuel system diagram


Chances are its what is called the fuel pressure regulator is the problem.
These other systems have vents and valves and are disgined them selves .
The pressure regulator deals with the fuel injecters mainly back pressure feed back to the tank .
The vehicle will run OK but when you shut it off you smell gas vapor it has to get out .

Mar 26, 2015 | Cars & Trucks

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What make, model and year is the bike you need a diagram for??

Sep 13, 2014 | Motorcycles

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Vaccum diagram 2003 chevy impala


Try billionautoparts.com. It's a parts buying site, but they have pretty complete exploded diagrams that show all parts of different systems. You don't have to buy anything, just see if the diagrams help. Then, if you are missing any parts, you'll know what to buy. I don't recommend buying from billion, unless you want brand-authentic parts, as they are suppliers for dealers and everything is straight retail. But, you will have the correct part number to use when you buy from somewhere cheaper.
Billion Auto Parts

Jun 07, 2014 | 2000 Chevrolet Impala

1 Answer

When does the spark plugs needs to be change


Usually you know when you need sparkplugs when it starts to miss. That is it runs smooth then kinda skips, runs smooth, then skips. Spark plugs will not cause your engine to cut off completly. Could be a coil problem or a fuel system problem. I would check fuel filter or fuel pump.

Dec 05, 2013 | 2002 Jeep Liberty

1 Answer

WHERE IS THE FUEL PUMP RELAY LOCATED! I CHANGED THE FUEL PUMP AND FUEL FILTER BUT I CAN NOT FIND THE RELAY 1988 ELDORADO. I AM NOT GETTING ANY FUEL IN TO THE CARB


Am working on the same problem. Have narrowed it down to a couple of things. The primer curcuit on my '88 is not work off the computer it will not prime the fuel system. Have found away around that by putting in a new relay off the starter line. The main problem though is that the check valve in the fuel pump is shot and allows all the fuel to drain back into the tank. It takes too much time to get the fuel preasure up if the fuel system is completely empty. Am going to replace the fuel pump and see what happens. The fuel pump relay is located under the glove box, have not found diagram map of the relays there, there are 10 there. If you need a wiring diagram for your car, go to autozone, can print off a wiring diagram there. Good luck.

Sep 04, 2011 | 1988 Cadillac Eldorado

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