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-   -   70 Deville fuel pump Q’s (https://www.cadillacforum.com/forum/cadillac-coup-deville-30/70-deville-fuel-pump-q%92s-18903/)

Deville Dog 03-20-2019 04:54 PM

70 Deville fuel pump Q’s
 
Replaced my fuel pump. Most likely orig. had one 3/8” port and one threaded feed . New pump has a 2nd port hanging off that is 1/4”. Noticed when i ran new fuel line that there is another pick up on the tank. Did there used to be a fuel return on these beasts back in the day? Am i OK to cap off the Additional port or run a return?

TomSchaeffer 10-13-2021 09:21 AM


Originally Posted by Deville Dog (Post 55813)
Replaced my fuel pump. Most likely orig. had one 3/8” port and one threaded feed . New pump has a 2nd port hanging off that is 1/4”. Noticed when i ran new fuel line that there is another pick up on the tank. Did there used to be a fuel return on these beasts back in the day? Am i OK to cap off the Additional port or run a return?

Hi! I am not sure about it, but I think that you need to check the vehicle history before and you will find out..

Zx600e93 11-28-2021 03:46 PM

Same boat haha
 
I believe that's the return line that goes back to the fuel tank, I've cleaned both lines out, replace all fuel hoses, and test the fuel pump for our recent buy a 70' Coupe Deville 😀
https://cimg9.ibsrv.net/gimg/www.cad...9bf0917824.jpg


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