.....someone just did a fuel pump replacement.......i am facing one of those....i think the original one is still in there at 94k on my 94 lt1......any job descriptions and tips?.......

 

That is actually one of the easiest R&R jobs on a C4 as the pump assy. comes out through the filler cavity. Expected time to complete this job is about 1/2-1hr.

Buy an AC Delco pump and pickup screen and have a length of rubber tubing handy to go onto the supply & return fuel lines. Some would suggest you also buy some small O-rings and a new mouting flange gasket, though I simply reused my old ones.

Remove the fuel cap, remove the filler door & rubber boot, open the electrical connector to the left of the opening, disconnect the three fuel lines, loop the tubing between the two right side lines, remove the ring of bolts in the mounting flange (careful to save the O-rings), work wth flange free and lift the assy from the tank and let any fuel evaporate from the assembly or blow it dry with compressed air.

Then open the electrical connector just under the mounting flange and clean the three contact points, install the connector, install the new pump & pickup screen. Use care so as to not bend the fuel level sensor apparatus.

Install the pump assembly in the reverse order as above.

 

I just replaced mine yesterday. too easy to give tips. but you might run into a few glitches like me.
1. make sure you have the big square gasket that goes around the top piece.
2. masking tape (place this under where the gasket goes. it will keep the rust from going in the tank.
3. take two 10mm sockets and two extenders. the bottm two nuts under the cap maybe obscured a bit. place the socket on the left screw first it should prop the fuel return up enough to get the right screw.

other than that the unit comes right out. you slide the pump off and keep an eye on how the gasket goes on.
goodluck :thumbs:

 

....thanks very much guys..... :)

 

It not a hard project at all. I'd also suggest wearing latex gloves when you do it. Unless your girlfriend/wife really likes the smell of gasoline on your hands.

Also, pick up a new strainer(the plastic sock thing at the end of the pump. The old ones probably seen better days and it's only 5 or 6 bucks more. Napa had all the stuff in stock when I did mine. Cost around $55 total.

Took me less than an hour and that included cleanup and taking my time to not get any dirt or dust into the fuel tank.


Chris

 

I'm in the process of changing mine out right now too. 17 year old pump was still running. It and my aux pump could'nt keep up with demand for more fuel pressure, so I ordered a Walbro 255lph unit. Should be here in a couple days. If anyones interested, http://www.rpmoutlet.com has them for $107 shipped.