Fuel problem

Hi all i have a problem i put a new fuel pump worked for two days and it stop working i thought it was defective so i went out bought new one again and day later same thing so i disconnected fuel line and turned the key no fuel pump not working again so can someone please tell me whats going on and i bought new fuel pump relay that was not the problem still no fuel pressure. Help please

 

Have you replaced the fuel filter? It could be clogged.

 

It’s either clog somewhere, or electrical, fuels relay etc

 

I changed everything filter, relay but when i spray starter fluid in brake booster vaccum line she stays running by starter fluid but i stop spraying she dies out no fuel

 

Connection to fuel pump, maybe a lose ground somewhere

 

The easiest is take the fuel pump and connect to a 12v see if it spins. If it spins that’s mean a lose connection somewhere

 

My $$$ says it's not the pump. You have a wiring/relay/switch problem somewhere in the fuel pump circuit then. Test it and verify before throwing parts and $$$ at the issue. You need a voltmeter or 12v test light. Follow the wiring from the fuel pump back to the first connection you find and test the electrical connection there. If there is power to that point then you need to keep tracing it back until you find where exactly it is not getting power. Logic is your friend here.

 

Ill check on that someone told me it could be (fuel pump resistor) too. but ill use test light from the tank to wire harness thanks ill keep you guys posted.

 

OP, you ever solve this problem?

 

Yes i solved the problem it was everytime i lift the tank into place the plug would come off. I tried fow time starting it started and went through rough street and didnt come off. Thanks and now i have different problem ots running rough now and shaking it never did that before the fuel pump. I put new sparkplugs right about now it have every sensor new even coils but check engine light not on. Has no power l
Sound like bogging out like dam honda when they put air cleaner tube.

 

Good to know you solved the issue.

Have you checked to verify that you fully seated the plugs and didn't leave one or more loose and/or the coils are connected to the correct plugs? Sounds like an electrical issue again to me.

 

There all tight. Never had this problem until i put the fuel pump now this happening ill see if can make short video so you can see and hear it soon.

 

A video may help. I'd recommend checking your fuel pressure at the fuel rail and make sure the pressure is in spec before tearing back into the tank/pump or anything else. Just out of curiosity did you verify that the fuel pump installed is the correct one for your application?

 

Verify pressure, then verify/clean injectors. I dunno about toyotas, but jeeps you build a rig with a water bottle of injector cleaner, a hose, and a 9v battery. Squeeze the bottle to make the flow. Itll also click when you connect the jumer wires to the battery. I dont know if its bad to leave them on, i always flutter the signal.

 

Yes, he could test the injectors but I don't believe that's the issue. Note that he states in his opening comment that the truck was fine for 2 days before needing to replace the pump a 2nd time. No mention of running issues prior to the 1st pump replacement.

 

Still worth a test. Maybe the wiggling and jiggling sent some junk down the line?

 

Possible. There are still some unknowns in this scenario. Fuel rail pressure test will reveal more.

OP, which engine is in this truck? 6 cyl or 8 cyl?

 

What fuel pump did you use?

Hose not clamped properly inside tank could cause low fuel pressure and rough running issue. Or old hose re-used and developed a leak.

 

I put new fuel pump ots starts runs everytime i turn the key now its running in few seconds after starting that when she get rough idle and no power the fuel pump is recommend for my truck 2003 4.7

 

Sounds like my prom night.

 

Ok, but did you check your fuel pressure at the fuel rail? If not that is the next logical thing to do. Verify the pressure is in spec then let us know what the pressure reading is and we'll go from there.