fuel system questions.
Thread Starter
Junior Member
Joined: May 2007
Posts: 14
Likes: 0
From: Saskatoon, SK Canada
Car: 1987 Firebird
Engine: 305 LG4 lightly modified
Transmission: 700R4
fuel system questions.
I have a 1987 firebird with a 305 carb automatic trans. I have recently been having carb issues and decided to convert to fuel injection. I purchased holley's 2d projection throttle body injection to replace the carb. I had a shop look over the instructions so they could give me a cost. They called today and said that everything should work however I might have to get a new fuel tank because the one I had would not have the proper venting for a fuel injection. They also said if I call holley and ask them about using the evap canister fuel line as a return line. Holley said that was fine. Holley also said that they weren't sure why the shop was saying I would need a new tank. So my question is why they said I need a new tank thats vented for fuel injection.
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Gads, that's scary.
Right now you have a fuel supply, fuel return, and vapor recovery line going from the fuel tank to the engine compartment. The vapor recovery and supply line are pretty much a given to keep in place and use as currently. The return line depends, and I'm not all that familiar with that particular Holley set-up.
What's scary is if the shop says something like that, makes you wonder if they are competent to do this job.
Right now you have a fuel supply, fuel return, and vapor recovery line going from the fuel tank to the engine compartment. The vapor recovery and supply line are pretty much a given to keep in place and use as currently. The return line depends, and I'm not all that familiar with that particular Holley set-up.
What's scary is if the shop says something like that, makes you wonder if they are competent to do this job.
Supreme Member
Joined: Jan 2003
Posts: 2,133
Likes: 4
From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: fuel system questions.
You'll need a fuel pump that will supply the higher pressure required by the PRO-Jection TBI unit. The carb pump won't work for this application. You might have to replace the entire sending unit, but not the tank.
I assume you know this has an Emission Code 3-Amber therfore Not Legal For Street Use.
I assume you know this has an Emission Code 3-Amber therfore Not Legal For Street Use.
Thread Starter
Junior Member
Joined: May 2007
Posts: 14
Likes: 0
From: Saskatoon, SK Canada
Car: 1987 Firebird
Engine: 305 LG4 lightly modified
Transmission: 700R4
Re: fuel system questions.
thanks rgarcia63 the kit came with its own fuel pump, and in canada there isn't to much to worry about emissions wise. It was more of a miscommunication between me and the shop, its all been sorted out now thanks for the help guys.
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