Hi I'm a 17 year old without much car experience, and I have a 1984 Pontiac Trans Am 305. My car is experiencing a gas leak from right under the fuel pump. It started out small as I could only smell a faint gas smell while driving, but after about two days gas has started leaking alot (I have since stopped driving the car). I'm wondering how hard it would be to replace the fuel pump with little car experience. I've called to get professional estimates and they are around $400, and I can't afford that. Could someone please tell me if I can do this fairly easily, and give some simple instructions how. Also, my car has had problems starting up lately (only after not being driven for 5+ hours). Originally, I believed that this was due to a faulty starter, but am not wondering if it was the fuel pump failing. Thanks alot.

 

Try a search on "replacing the fuel pump" here

https://www.thirdgen.org/techbb2/search.php

You should be able to find what you are looking for without all the wait..By the way welcome to the boards. Lots to learn here, just use the search option to find what you are lokking for.

Again Welcome!

Keiran

 

A fuel pump costs about $12, and takes about 10 minutes to change. One of our cars (El Camino with a 305) shot its FP one day; I sent my wife down the street, less than a mile to pick one up; shortly after she left, I noticed that I had one in stock on the shelf, so I replaced it; by the time she drove back up the driveway, the pump was done and the car was already sitting there running.

I think that either somebody thinks your pump is in the tank, or they're trying to bend you over without a reach-around.

You remove the 2 rubber lines and one steel line that go to it; unbolt the 2 bolts that hold it on; remove it and clean the gasket surface; installation is the reverse of removal. The only thing even remotely near hard is making sure the little arm that sticks into the block is underneath the tip of the rod that drives it, you'll need to push the rod back up right before you put the new pump on.

 

It will take you around 3-4 hours on a stock LG4 (the 305 V8 produced until 86) you might consider removing the AIR pump (smog pump) befrore the fuel pump so you have more working space. The fuel pump is easier to get at with a lift, but can be done without one. If you pick up a new holley mechanical pump, it will have the instructions in the box. They cost around $80-85 from your local parts store.

 

Do it from underneath... there's nothing in the way.

For a stock LG4, I wouldn't bother with any kind of high $$$ fuel pump; a generic replacment one will work just fine, and if you ever mod your motor to where it needs more than 400 or 450 HP of fuel, you won't feel so bad about pitching a $12 fuel pump in the trash.

 

My mistake..I swore it said 89 Trans am. Sorry..yeah two fuel lines and two bolts and a bit of surface cleaning and your done, yes and of course the dreaded push rod. Again sorry, I did not read your question well enough.