Fuel Pump Question
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 40
Likes: 0
From: Yuma, Arizona
Car: 1986 Trans Am/2002 Trans Am
Engine: 305 V8 and LS1
Transmission: Auto
Axle/Gears: Stock
Fuel Pump Question
I wasn't sure where to post this and thought I would try here. I have a 1992 25th with a 305 bored .30 over...everything else stock. I think that the fuel pump needs replaced. When it gets hot after driving the car for a while it begins to make a loud howling sound and I can smell fuel? Any suggestions? It also sets the lovely EGR code. Any help would be great.
Thread Starter
Junior Member
Joined: Jun 2008
Posts: 40
Likes: 0
From: Yuma, Arizona
Car: 1986 Trans Am/2002 Trans Am
Engine: 305 V8 and LS1
Transmission: Auto
Axle/Gears: Stock
Re: Fuel Pump Question
Sorry, I should have been more specific. It is TBI and the fuel pump is in the tank.
Supreme Member
iTrader: (3)
Joined: May 2008
Posts: 1,116
Likes: 1
From: boise, ID
Car: 91 B4C "police special service"
Engine: L98 494hp
Transmission: tko-600 on order
Axle/Gears: 3.23 true trac
Re: Fuel Pump Question
Sounds like to me bad pump and/or tank is not venting to well.....I've had similar problems in a couple of my Z's.....so when tank gets hot, the pump starts making a hum sound, and car runs poorly or dies all together (if not it will start)....that to me sounds like pump.....get a good name brand, don't get a cheapy or you'll be right back in same boat again...also change fuel filter (I do mine every other oil change). The smell of gas is the tank getting hot and vented gas fumes.....try running the tank with more fuel inside....don't go below half tank when hot ever if you can. There are other things you may try to, like putting heat shielding on bottom of tank, but up to you....have fun replacing pump....easy but long process. hope that helps some....
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Thread Starter
Junior Member
Joined: Jun 2008
Posts: 40
Likes: 0
From: Yuma, Arizona
Car: 1986 Trans Am/2002 Trans Am
Engine: 305 V8 and LS1
Transmission: Auto
Axle/Gears: Stock
Re: Fuel Pump Question
Thanks, I appreciate that. Looks like fuel pump time yeah!!! Not a daily driver so I can take my time. I am contemplating an access hole in the rear hatch but have read alot of pro's/con's about it. Not throughly convinced that is the way to go? I'll get the fuel pump first and then decide. Thanks again.
Supreme Member
iTrader: (3)
Joined: May 2008
Posts: 1,116
Likes: 1
From: boise, ID
Car: 91 B4C "police special service"
Engine: L98 494hp
Transmission: tko-600 on order
Axle/Gears: 3.23 true trac
Re: Fuel Pump Question
I have seen people hack everything up to save a little time changing pumps.....I would just do it right and not cut an access hole.....by the time you cut the hole and what not you could have changed out the pump without cutting your car....but that's just my opinion.....just get a GOOD pump, or you'll regret it.....
Senior Member

Joined: Jan 2006
Posts: 726
Likes: 1
From: League City, TX
Car: 90 Formula -- tot resto in progress
Engine: 350
Transmission: 700R4 w/ 2500 stall, by Owen @ ARD
Axle/Gears: 3.23 posi disc
Re: Fuel Pump Question
I'm at the fuel-tank stage of the restoration, and have listened to
the pro's & con's of the access port idea. That went out the window
after I dropped the tank (for cleaning of tank, and undercarriage...)
and removed the fuel sender/pump assembly. On the formula, this
had 18" of pipe(s), in a large angle bend.
Bottom line -- an access port to remove this with the tank installed,
would have been most of the rear seat area. So check the length
of your outlet tubes, before heading down this rabbit hole.
Good luck.
the pro's & con's of the access port idea. That went out the window
after I dropped the tank (for cleaning of tank, and undercarriage...)
and removed the fuel sender/pump assembly. On the formula, this
had 18" of pipe(s), in a large angle bend.

Bottom line -- an access port to remove this with the tank installed,
would have been most of the rear seat area. So check the length
of your outlet tubes, before heading down this rabbit hole.
Good luck.
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