How to Build and Install Fuel Lines on a Porsche 944 Turbo

How to build an entire fuel system front to back.

The existing fuel lines in the Porsche 944 Turbo were old, ratty, and even damaged. The rubber hoses, since being 30+ years old, have a tendency to crack and leak as well. So it’s a good idea to replace it all, front to back. Check out the video below to see how we did it, or scroll further down for a quick step by step with full parts list and installation diagrams.

Part 1 of How to Build & Install Fuel Lines in The Porsche 944 Turbo

Part 2 of How to Build & Install Fuel Lines in The Porsche 944 Turbo

Porsche 944 turbo pinched fuel line
Pinched return line causing high pressure in the fuel system.

We started with getting all of the correct parts and fittings, here is a picture showing most of parts and fittings used in this install.

Products Used:

Products used in these videos:

Qty. – Product – Link

Janky Fuel Rail Adapter Parts:

The Setup

After getting all of the parts needed for the job, we set up the old fuel pump and filter, we measured out the distance and relation between the pump and filter.

Old Porsche 944 fuel pump and filter
Old Fuel Pump and Fuel Filter

Once we had the measurements, we installed the adapters and fittings required on the fuel filter and fuel pump. We then mimicked the old fuel pump and fuel filter relation with the new Bosch 044 pump and filter. From there we were able to measure the length of the new 6an hose required for the fuel line assembly. More info on how we measured this in the video above.

We used a grinder to cut the hose as it melts the nylon while cutting. This prevents the nylon from fraying, which makes installing the fitting much easier.

new porsche 944 turbo fuel pump and fuel filter assembly
New and Old Fuel Pump and Fuel Filter
Porsche 944 Fuel System Upgrade back of car
Fuel line setup at the back of the car by fuel tank
Fuel line setup at the front of the car under the hood and behind passenger wheel
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