84 L69 Fuel return line
07-21-2017, 11:26 AM
#1
Supreme Member
Thread Starter
84 L69 Fuel return line
I am still finding little gems from the previous owner. The most recent is a fuel system related question.
Under my car (1984 L69 Pontiac TA) where the lines for the evap system have been disconnected and left hanging there is one that is plugged with a screw and a hose clamp. I removed to screw to see if anything came out and I noticed a lot of fuel vapor and I plugged it back up. Did my car at one point have a fuel return line?
Under my car (1984 L69 Pontiac TA) where the lines for the evap system have been disconnected and left hanging there is one that is plugged with a screw and a hose clamp. I removed to screw to see if anything came out and I noticed a lot of fuel vapor and I plugged it back up. Did my car at one point have a fuel return line?
07-21-2017, 06:58 PM
#2
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,123
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 84 L69 Fuel return line
It had 4 lines from the tank. 1 went to the "UFO" in front of the left rear spring. 1 went to the vapor canister. 2 went to the fuel pump, 1 supply and the other return.
07-21-2017, 07:10 PM
#3
Supreme Member
Thread Starter
Re: 84 L69 Fuel return line
Thanks it looks like the previous owner of my car did some alternative ethnic engineering and an attempt to make it more old school...
07-21-2017, 07:58 PM
#4
Supreme Member
iTrader: (1)
Join Date: Feb 2017
Location: Meriden, CT 06450
Posts: 4,034
Received 517 Likes
on
431 Posts
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 84 L69 Fuel return line
07-27-2017, 05:33 PM
#5
Member
Join Date: Oct 2009
Location: Washington-state
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
Car: '96 Camaro-Vsux -- SOLD, '84 Z/28
Engine: 3.8L, 305 SBC
Transmission: 4L60E, T-5
Axle/Gears: 3.08s, 3.23s
Re: 84 L69 Fuel return line
I am still finding little gems from the previous owner. The most recent is a fuel system related question.
Under my car (1984 L69 Pontiac TA) where the lines for the evap system have been disconnected and left hanging there is one that is plugged with a screw and a hose clamp. I removed to screw to see if anything came out and I noticed a lot of fuel vapor and I plugged it back up. Did my car at one point have a fuel return line?
Under my car (1984 L69 Pontiac TA) where the lines for the evap system have been disconnected and left hanging there is one that is plugged with a screw and a hose clamp. I removed to screw to see if anything came out and I noticed a lot of fuel vapor and I plugged it back up. Did my car at one point have a fuel return line?
07-27-2017, 05:35 PM
#6
Supreme Member
Thread Starter
Re: 84 L69 Fuel return line
I do not have my charcoal canister but I do have my UFO
07-28-2017, 01:26 AM
#7
Senior Member
Join Date: Apr 2016
Location: Perth Western Australia
Posts: 517
Likes: 0
Received 4 Likes
on
3 Posts
Car: 1987 Z28 Camaro
Engine: 305 LG4 4bbl
Transmission: TH700R4
Re: 84 L69 Fuel return line
This thing doesnt have a holley or a non original carb does it?
When i went back to an old school q-jet i had to block this one off, pretty much any holley running car had to aswell.
When i went back to an old school q-jet i had to block this one off, pretty much any holley running car had to aswell.
Trending Topics
07-28-2017, 06:44 AM
#8
Supreme Member
Thread Starter
Re: 84 L69 Fuel return line
It does the previous owner installed an Edelbrock with the new motor. Although he could have just used the return Port on the mechanical pump. Either way it is plugged with no leaks and the tuning is going well. It is good to know I have a return Port for my future EFI plans
07-30-2017, 08:35 PM
#9
Senior Member
Join Date: Apr 2016
Location: Perth Western Australia
Posts: 517
Likes: 0
Received 4 Likes
on
3 Posts
Car: 1987 Z28 Camaro
Engine: 305 LG4 4bbl
Transmission: TH700R4
Re: 84 L69 Fuel return line
the mechanical pump even on a carbed engine will still use the return, but that evap line with the canister on it generally wont be used with an aftermarket, or an old school carb.
07-30-2017, 08:45 PM
#10
07-31-2017, 09:09 AM
#11
Supreme Member
Thread Starter
Re: 84 L69 Fuel return line
Yes most of them do but some don't, I need to see if my pump had a now plugged port. I swear after 5 years I still find interesting things. If it does have a return port I will probably run a soft line back to the tank.
07-31-2017, 01:02 PM
#13
Supreme Member
Thread Starter
Re: 84 L69 Fuel return line
Yes he did
07-31-2017, 06:15 PM
#14
Supreme Member
iTrader: (1)
Join Date: Feb 2017
Location: Meriden, CT 06450
Posts: 4,034
Received 517 Likes
on
431 Posts
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 84 L69 Fuel return line
If you have to, you can use this cheat: