Fuel Pump

[Malones99]

When I turn the key no fuel pump whine, tested and replaced the relay, narrowed it to the pump, how do you take the fuel lines off the pump, they seem to be spring loaded, but I twist and turn, but that doesn't help.

Thanks in advance.

-Mark

 

[GMCYukalade]

If You are for sure going going to buy a new pump, you can clip the plastic off of the old pump, go ahead and get the tank out of your way, and then while at autozone, you will pick up a tool - its a fuel line remover tool - they have this kit - it's little plastic peices.. and they have a small metal fuel line remover tool... its like 7.99 - you will need it, - it is just about impossible to use it to take out the lines.. but, once they are broke, you can use it, and a screw driver to get the lines out-other wise just go to autozone, and get the kit with the plastic peices in it, and use them to take the lines out *don't know how easy they will be

 

[Rick90467]

If You are for sure going going to buy a new pump, you can clip the plastic off of the old pump, go ahead and get the tank out of your way, and then while at autozone, you will pick up a tool - its a fuel line remover tool - they have this kit - it's little plastic peices.. and they have a small metal fuel line remover tool... its like 7.99 - you will need it, - it is just about impossible to use it to take out the lines.. but, once they are broke, you can use it, and a screw driver to get the lines out-other wise just go to autozone, and get the kit with the plastic peices in it, and use them to take the lines out *don't know how easy they will be

I did mine last month, and did the same. It is way to much hastle getting those connectors off with that tank in the way. There was no core value in the pump any howl.

 

[sasquatch094]

i never used a tool on getting my pump out.. its jsut a matter of being very careful since those lines that your about to get involved in cost a **** load. and imean i spent 400 and something dollars on those 2 metal fuel lines that are about 3 feet long.. so dont cut or break those or youll regret it.. just a fyi

 

[Malones99]

No worries! bought the $7 tool and the broken plastic pieces came right off!!!! Definitely worth the $7!! In all took me about 20 minutes to get the tank and all the connections back on!!

 

[sterios]

Hey Sasquatch i just cut my plastic parts of the fuel lines that run into the pump and replaced just those pieces with fuel hose and a few clamps. I priced out the fuel lines and stroked out when i found out how much they wanted for them. Could this be why I'm getting crappy mileage now? No fuel leaks i can see.

 

[sasquatch094]

ahha yeah those things are a JOKE.. thats kinda weird that changing to rubber would change something so drastic. how much did you appr. lose in changing to rubber fuel hose?? im not sure if this could be the reason, but would u ever think rubber hosing has small holes in it leading it to seep out?? but how would that effect your milage.. huh thats really wierd..

 

[sterios]

After changing the fuel pump twice in two weeks and the fuel filter and the plugs cap and rotor and a full fuel system flush i'm still only getting around 550 km per 115 litre tankfull. Before all this I got close to 750 highway. Did the fuel pressure test and all is well. Cleaned the MAF sensor and replaced the air filter. No visible leaks anywhere and the intake isn't flooding with gas. Two new pre-cat O2 sensors as well. I'm stumped.

 

[GMCYukalade]

Sterious - I have one thing you need to check that you may have not been thinking about - the Fuel Return line - where you went to rubber lines, you need to make sure that when you push the tank up into place that the lines aren't kinking... food for thought - that or replace the fuel pressure regulator.. or even the injectors

 

[Rick90467]

After changing the fuel pump twice in two weeks and the fuel filter and the plugs cap and rotor and a full fuel system flush i'm still only getting around 550 km per 115 litre tankfull. Before all this I got close to 750 highway. Did the fuel pressure test and all is well. Cleaned the MAF sensor and replaced the air filter. No visible leaks anywhere and the intake isn't flooding with gas. Two new pre-cat O2 sensors as well. I'm stumped.

Have you calculated your fuel cons. yet. I mean by fill up tank; drive 500 km; fill up again and see how much fuel was used.

Another thought is your old pump was starving your engine. Or, had a different range on the fuel gauge causing you to think it is near empty when it still has a quarter tank.

 

[Malones99]

On a note about fuel injectors, my dealership replaced my fuel injectors, fuel rail, and filter for free, stating there is a recall, I couldn't find one. But I'm not going to argue for a $2300 fix!

 

[sterios]

I checked the return line for kinks and all is well. I'm leaning towards the regulator now. Fuel injectors were cleaned. Lots of power just like before I changed the pump out. I'm going to drop the tank again and recheck everything. I'm going to swap out the sending unit and put back the one I took out and see if it's just a different reading i'm not used too. I filled it up one day and brought along a spare tank of gas and ran it dry on the highway, I know very bad, and only got 560km on 115 litre tank. Thanks for all the tips

 

[GMCYukalade]

I mean you would actually have to drop the tank to check those two lines, you have to look very carefully as you are putting the tank back in place to see if they kink up.. - but thats probably not the problem - that would probably cause your intake to flood

 

[sterios]

When i lower the tank I'll have room to take a look before disconecting the two hoses. I cut them the same length as the ones I removed. Won't be for another couple of weeks though once I get a chance. Thanks

 

[GMCYukalade]

I have a friend that works at O'Reilly Auto Parts, he replaced the fuel pump in a 98 burban, and used rubber lines as well - and he found out that he had a kink in them when putting the tank back in, but his problem was in the sending not return line