What is the second line on a fuel pump for on a 1970 pontiac 350, and will it effect how the engine runs if capped off?

55

Asked by Sep 21, 2014 at 08:28 AM about the 1970 Pontiac Le Mans

Question type: Maintenance & Repair

3 Answers

73,935

That second line is a return line to the gas tank for cars equipped with air conditioning. It prevents vapor lock. It's not a vacuum line. In other words if your Pontiac has A/C there's 3 connections on the fuel pump. The one from the gas tank, the one to the carburetor, and the return line to the gas tank. If you do not have A/C you should only have 2 connections on the pump. One coming from the gas tank and one going to the carburetor. HTH. -Jim

2 of 2 people found this helpful.

I stand corrected. Thanks Jim, I believe you over the source I got that from

3 of 3 people found this helpful.
73,935

You're welcome, Fordnut. I had a '70 Catalina once upon a time. -Jim

2 of 2 people found this helpful.

Your Answer

Le Mans

Looking for a Used Le Mans in your area?

CarGurus has 20 nationwide Le Mans listings and the tools to find you a great deal.

ZIP:

Pontiac Le Mans Experts

  • #1
    Rucko
    Reputation
    440
  • #2
    Js08016
    Reputation
    190
  • #3
    Daniel Perron
    Reputation
    160
View All

Related Models For Sale

Used Pontiac GTO
7 Great Deals out of 409 listings starting at $4,995
Used Chevrolet Camaro
526 Great Deals out of 31,058 listings starting at $1,450
Used Pontiac Firebird
8 Great Deals out of 731 listings starting at $1,649
Used Dodge Charger
458 Great Deals out of 34,933 listings starting at $2,000
Used Pontiac Tempest
13 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.