# Volvo fuel pump puzzler **URL:** \ **Category:** The Show\ **Created:** [March 5, 2019, 3:21am UTC](https://community.cartalk.com/t/volvo-fuel-pump-puzzler/135810 "2019-03-05T03:21:43Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [March 5, 2019, 3:21am UTC](https://community.cartalk.com/t/volvo-fuel-pump-puzzler/135810/1 "2019-03-05T03:21:43Z")
A recently podcast puzzler is about a fuel injected Volvo that won’t run well if the fuel level in the tank is below 1/2 full. This Volvo is configured with two fuel pumps, a low pressure feeder pump mounted in the tank, and a high pressure pump mounted between the tank and the fuel injection rail. I got to wondering why Volvo engineers would configure the fuel system that way? Seems unnecessarily complicated. Why not just put one high pressure pump in the tank as is done w/most modern vehicles, and completely eliminate the need for a feeder pump? Here’s the puzzler link [https://www.cartalk.com/puzzler/pump-down-mileage](https://www.cartalk.com/puzzler/pump-down-mileage) ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [March 5, 2019, 4:02am UTC](https://community.cartalk.com/t/volvo-fuel-pump-puzzler/135810/2 "2019-03-05T04:02:59Z")
> [@George\_San\_Jose1](#): > > Seems unnecessarily complicated. Why not just put one high pressure pump in the tank as is done w/most modern vehicles, and completely eliminate the need for a feeder pump? The puzzler is 30 years old, that was the common configuration in the 1970’s. This puzzler sound like a tale, the vehicle owner was driving a car that was squirting gasoline from a leaky fuel line, enough to affect fuel economy but did not complain about the odor.