fuelpump replacement?

i have recently installed a new pump .(97 merc villager Ls) upon inspecting the new pump i noticed it had a valve or something in the Copper tube where the dampner connects too. i proceeded to install it thinking it was ok there. i then reassembled it back into the tank and put the tank back up. i then primed the pump about 3 times. the van did not start. all hoses are back where they were . upon inspecting the old pump i did not see this valve looking thing. did i do something wrong?

i have recently installed a new pump .(97 merc villager Ls) upon inspecting the new pump i noticed it had a valve or something in the place where the hose connects too. i proceeded to install it thinking it was ok there. i then reassembled it back into the tank and put the tank back up. i then primed the pump about 3 times. the van did not start. all hoses are back where they were . upon inspecting the old pump i did not see this valve looking thing. did i do something wrong?


What brand fuel pump????

What brand fuel pump????

it is a delphi fuel pump:banghead:

I believe that is the fuel dampner. Luckily I have not had to replace the fuel pump to date/

I assume you can hear the pump run for 5 seconds then turn off.

What was the reason for fuel pump replacement. Did it die or just loose pressure???

I also assume new pickup screen was installed.

yes i hear the pump. yes new screen filter is on it. the reason was that the old one died. fuel dampner? the fuel dampner isnt my problem. the problem is that where the dampner hooks onto the copper tube for the pump. there is a valve type looking thing in the copper tubing. was i supposed to take that out.? the other pump never had one in it?

yes i hear the pump. yes new screen filter is on it. the reason was that the old one died. fuel dampner? the fuel dampner isnt my problem. the problem is that where the dampner hooks onto the copper tube for the pump. there is a valve type looking thing in the copper tubing. was i supposed to take that out.? the other pump never had one in it?

I would not think it should be removed. I am thinking that is the check valve to prevent the fuel from returning to fuel tank and keeping the fuel rail presssurized. I am not positive of this as I have not heard of this before but looking on a few parts web sites I see what you are speaking of.

Have you tried starting fluid in the air cleaner to see if that makes a difference?? You may also want to check fuel pressure, I have seen new pumps be defective also.

Have you checked the fuel pressure regulator for any gas in the vacuum line or smell??

You have spark correct///

my next step is to check if there is fuel to the rail. i sure dont wanna take the tank down again .... yepp spark is correct. its been baffling me now for a few days.

my next step is to check if there is fuel to the rail. i sure dont wanna take the tank down again .... yepp spark is correct. its been baffling me now for a few days.


I would think if the piece you are speaking of needs to be removed there would be a paper with the instructions stating to remove.

Yes it sucks to have to remove tank twice, i have done it because of a bad new pump on a caravan.

i'll reread the paper that came with it and see. if not then i'll check the line at the rail and see if any fuel is comming through or not. if then i see none i'll drop the tank yet again. thanks for the help thus far. will keep you posted on my findings

well i tried the van again today . primed it 4 times. then cranked it over and still no go. am i to assume that i may need to drop the tank yet again?i never took the hose off the rail as of yet.

well i tried the van again today . primed it 4 times. then cranked it over and still no go. am i to assume that i may need to drop the tank yet again?i never took the hose off the rail as of yet.

Spray some starting fluid or carb cleaner into throttle bosy and see if it runs, if it does run you know it is a fuel delivery problem and you may need to drop tank again. I learned the hard way to just put enough gas in tank to start before filling tank, at least then you do not have to drain a full tank of gas.

Sent PM

well when i went out and reread the paper it says nothing about the piece i mentioned. so i am assuming it should be there. after priming the pump several thousand times i tried to start it. it gave a few chugs as if she wanted to start. but then no go. the pump is working, the ignition is right, just waiting for the battery to charge again, i was smelling gas so i am assuming its getting there. i'll try again in a few hours. maybe flooded now.? will report back later on

well when i went out and reread the paper it says nothing about the piece i mentioned. so i am assuming it should be there. after priming the pump several thousand times i tried to start it. it gave a few chugs as if she wanted to start. but then no go. the pump is working, the ignition is right, just waiting for the battery to charge again, i was smelling gas so i am assuming its getting there. i'll try again in a few hours. maybe flooded now.? will report back later on


If you think its flooded hold the accelerator pedal to the floor this stops the injectors from squirting fuel into clyinder.

Can you explain what happened when the original pump died. Were you driving or just would not start, that sort of thing. How was it diiagnosed that the fuel pump was bad??? I realize you said that you have spark, is it blue in color or orange. Wheredid you test for spark??

it died right at the gas pump of all places to die. lol. the pump wouldnt work at all. i had checked what i knew of these systems. im an ole school type. older vehicles that is. still didnt kick in . now for the rest of what i have done tonight. i just need to get a piece of hose joiner to finish it. but she is getting the fuel properly now. i switched the hoses in the front instead of removing the tank this time. will post more tommorrow when i get it all put back together. many thanks soo far.

well my fix worked. :) many kudos for the help. thanks again.

[quote=VA3EPR;6972565]well my fix worked. :) many kudos for the help. thanks again.[/quote

Would you share the fix for anyone else that may need help in the future.

well insted of dropping the tank again to change the gaslines around ,i decided to change them at the front of the engine. where your fuel filter sits. i changed the bottom of the fuel filter and put it onto the bottom inlet into the engine. the hose running to the top of the filter stays on top inlet. and vise vers.