Cranks but won't start,new fuel pump,no power going to pump
I was driving when the truck lost fuel pressure it was still running.
I turned it off, I tried turning it back on, all it would do was crank and it wouldn't turn over.
Installed new fuel pump and crankshaft position sensor.
I have no power going to my fuel pump, even after I replaced my fuel pump relay switch. WHAT COULD IT BE.
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Is it an 94 or a 2004 Silhouette.You should hear a fuel pump when turning on the key (anytime after the key has been off for about 10 seconds) or whenever there is oil pressure.
If there is no fuel pump sound or fuel pressure when the key is turned on (this is the prime cycle) then crank the engine for at least 10 to 15 seconds to get oil pressure as this is the 2nd source of power to the pump and what powers the pump when driving.
Still no pump running?
Check fuse /wiring/connections/including ground.
Lastly..... New fuel pumps don't always work just because they are new,
Do real fuel pressure test using test gauge. You changed ignition module but not coil? Are you getting nice fat blue spark? When spraying starter fluid into intake it only tries to start which makes me think you have ignition problem.
To clarify, the engine cranks and starts. If it cranks but won't start until 4 or 5 tries, I would check the fuel pressure before and after the first attempt. The check valve in the pump may be faulty and allowing the fuel to flow back to the tank when it is not running. The pump only gets power for the first 3 seconds during crank time until the engine starts.
No such thing on your car. The temp sensor tells the computer what the engine coolant temp is. If it were faulty you would get a check engine light. I would have the fuel pressure checked before and after you crank the engine. The pump relay provides power to the pump when you turn the key on to recover some of the lost fuel pressure after the car sits. The one way valve in the pump is supposed to prevent the pressure from dropping. If the fuel pressure drops to zero it could take some time to crank the engine enough to get it back up.
Well then if no pressure at fuel rail then go to pump and in line filter as the in line filter might be the main problem but the pump pressure can also be faulty if filter is bad so check it out and let me know how you get on. Ron