How to replace an entire fuel line 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
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 |
| 1 | Injector Extension | bit.ly/injectorhat |
| 1 | 6AN Fuel Rail Adapter | bit.ly/fuelrailadapter |
| 1 | 1/8″ x 2″ Aluminum Stock | https://geni.us/clANL |
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.
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.
Thanks for the great detail on the specs. Is there a reason you chose cupro over running the braided lines front to back?
Hey Chris, glad you found it helpful. Yes, I went with cupro as it is significantly more durable than any rubber hose braided or not. My thinking was these cars had metal lines from the factory that have easily lasted 35 years+, so why not replace them with a similar line that has even better corrosion resistance properties and similar durability to the factory lines. These lines will likely last my lifetime and is one thing I should never have to worry about. Rubber hoses, including braided won’t be nearly as durable as metal and are more suspectible to wear… Read more »