Bypassing the fuel pump relay has potentially serious safety implications and is something only suitable for testing fuel system pressures or to be done in an emergency to start a dead car only when not doing it is potentially more dangerous than doing it.
Bypassing the fuel pump relay is not for the inexperienced and if a person asks the question how, that person is clearly not experienced. Data books providing fuel injection test data often include diagrams and how-to instructions.
SOURCE: 1989 honda accord fuel pump or relay not working
I know that you want a simple answer but, have you done any troble shooting steps at the pump its self? when the relay is in does it pump at all? what is your lin pressure?
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: fuel pump or fuel pump relay on 1989 Chevy Suburban 1500 4x4
the relay and fuse are in the power distribution box under the hood. as far a by pass you still can use an aftermarket electric pump ,however the cost will be about the same as re3moving the old pump in the tank if that is the cause in the first place. if all you need is the relay replaced then i'm sure that the pump is still good. if the pump is bad then make sure if you by pass the in tank pump that the new under hood electric pump has enough pressure to give the needed gpm(gallons per minute) required for your system and that if wired into the current fuel circuit that you dissconnect the wire harness to your tank pump
SOURCE: fuel pump relay problems
If the fuel pump relay looks perfect, check the contacts on the main fuel pump fuse (No. 6). The fuse may look fine, but remove it and shine up the holder contacts and fuse ends. They can develop dusty corrosion on the contacts. Reinstall the fuse and get ready to hear the purr once again.
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?
1,204 views
Usually answered in minutes!
×