Replacing an in-tank fuel pump how complicated is it to replace an in-tank fuel pump for first timers. I am pretty good with my hands once I know what I am suppose to do. But I have NO clue what is involved with replacing it. NO CLUE. I don't know how to check the lines, make sure there is pressure, cleaning the tank out (if it is necissary) and what tools I may need other than what I would have already in my garage, like specialty tools. Anybody got any pointers or suggestions, or is on of those things that I am better off getting someone else to do it?I ALSO I plan on putting a Holley in-tank fuel pump, either the 190 or 255 liters of fuel per hour one. They also have a 155 liters per hour one.
Is there that much of a huge difference between them? I don't have a lot of mods on my car, and don't plan on putting too many on. Do I need a 255?
What comes stock?

Everyone told me to go with Walbro, but I found this these REAL cheep, and I don't need something off the wall, just something I don't have to worry about, but that will still be somewhat of an upgrade than just stock. People said in-line pumps are easier, but I would still have to remove the old one, and stuff so I am going to just go ahead and just put in another in-tank is that smart?

I have other Holley brand upgrades and have had no probs.....Is Holley ok as far fuel pumps?

Is there anything else your suppose to go ahead and change when changing the pump?

ANY info would help

 

On an LS1 car im not sure if you have to drop the rear or not...but all you do is unbolt the shocks and down it comes.

I would just put another name brand intank fuel pump especially if you dont plan on any big mods such as heads/cam/nitrous.

No special tools needed,basic hand tools or air tools and a floor jack/jack stands. Two straps hold the tank up bend them back (with the jack underneath),lower the tank and undo the hoses and connector..and possibly a ground wire.

 

Like stated, drop the tank. Find yourself a Haynes Repair Manual to guide you through the steps ($15). It will come in handy if you plan to work on the car yourself. Disconnecting the fuel lines is a pain. On my friend's LT1, they were at the front/top of the tank. However, he decided to create an access panel (cut hole in trunk through sheet metal) instead of droping the tank. I wouldn't suggest that route. While you're at the store picking up the manual, you're going to need a new fuel filter ($7) and some gasoline safe adhesive ($4) to seal up the plastic container that holds the fuel pump. Yes, when you take it out you'll wonder, "How the f*** do I get the pump out of this thing?" Some gentle prying with a small screw driver worked fine for us. Just be careful not to destroy the plastic housing in the process. G/L

PS - If you just want to replace it with a stock pump, it's p/n 25338871. There's one on eBay up for auction with a $175 BuyItNow if you search for LS1 FUEL PUMP. It looks like you won't need the adhesive with this one.