It is impossible to propose a diagnosis without knowing the YEAR, MAKE, and MODEL of your vehicle.
That being said, check the fuel at the fuel rail. If you are getting adequeate pressure at the fuel rail (generally 40-50 p.s.i.), and the fuel pump is able to maintain the pressure, it is working. If insufficient pressure, check the operation of the fuel pressure regulator. If that is good, verify that the fuel pump is operating and that the fuel pickup strainer is not clogged with debris. If all is well, suspect an ECU failure or contaminated fuel.
Incidentally, it sure would have helped if you would have described the issue you were having that made you suspect the fuel pump instead of asking about the fuel pump.
If you are not getting
SOURCE: 1985 Volvo 240 no fuel no spark
well first the fuel pump relay is bad, that is easily replaced. next you have no spark. the first thing you do is take the cap off the distributerand crank the engine. if it spins that tell syou thyat at least the tang or gear on the shaft of the distributor is ok and not broken. next thing is remove the #1 plug and use a 1/4 drive extension 6" long and turn the crank by hand until the #1 cylinder is top dead center(put the extension in the hole of head where the plug was and you should feel the top of the piston also make sure you can feel the top of the piston with half the extension this way you don't drop it in the cylinder with the piston at TDC(top dead center) the rotor of the distributor should be pointed at the #1 firing position. IF it does not that means your timing is off and you need to retime it by taking off timing cover and either replacing the belt/chain or gears. now if you do not have a distributor and you have a coil pack there could be only 2 things that won't give spark. either a bad coil or your altenater is bad(the battery is responsible for starting not running the vehicle like alot of people assume. the altenator energizes the coil which inturngives spark. hope this helps you please rate this thanks
SOURCE: Security system will not let my car run.....
built into the pcm.....replace the key lock cylinder....get a new key with the same code as your old one and cut it to the gold key you get with the key lock cylinder
SOURCE: RENAULT MEGANE 1.6 FUEL PUMP RELAY CLICKING
i was told i needed a new fuel pump relay for my renault megane but when i put in the new one it only worked for a few minutes. the only way i can get my car to work now is by inserting some wire into two points on the relay bos and bypassissing the cut off device.any suggestions?
SOURCE: 1993 pontiac bonneville fuel pump problem
It could be that you have picked up a batch of dirty fuel that has clogged the gauze input filter that is part ot the fuel pump inside the fuel tank.
SOURCE: fuel gauge bouncing on 2000 chevy tahoe where is fuel pump relay
I had previously replaced the failing fuel pump on my '98 K2500 when it went out entirely. I was ready to replace my 2000 K3500's fuel gauge as it was acting up.
When I started the engine, the gauge would bounce from the middle to way past full then back. It would also jump sporadically while driving on level ground.
I checked the electrical connections at the tank and made sure the frame ground strap located nearby was making good contact. Nothing changed until I removed the instrument panel and cleaned the connections on the back. The fuel gauge seems to be operating correctly now.
There are videos on YouTube that show how to remove the instrument cluster if in doubt. Mine dash has a pop-in plastic bezel followed by 4 screws to hold the cluster in place. It took about a half hour to inspect & clean the dash connection vs. $250 to replace the pump/sending unit combo. Hope this helps.
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