Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   Engine Performance (https://www.miataturbo.net/engine-performance-56/)
-   -   Fuel line routing question (https://www.miataturbo.net/engine-performance-56/fuel-line-routing-question-110433/)

okcrystalx Jun 10, 2025 09:34 PM

Fuel line routing question
 
Hi,

I've been looking all over the internet and on this forum for this, but I can't find a clear answer - does anyone know what the name/part number/routing passageway of the topmost line in this image is?
https://cimg8.ibsrv.net/gimg/www.mia...6e65a7aa98.png
I've gone through multiple youtube videos and build threads, but no one seems to ever reference this line. I ask because I had to tap into it to check my fuel pressure recently because my '03 NB was giving hard start issues - pinch test showed injectors - but the quick disconnect fitting was so blown out and warped from heat it ended up essentially losing the ability to clamp. I need to remake the line, but I can't find anywhere online giving me a firm answer on what it is. Best I found was this video:
in which the presenter is gracious enough to mention it runs under the intake to the fuel rail, but doesn't mention the name or type of the hose outside of "a pain in the ass to replace." Can anyone help me with more information on this? I've made a fuel line from scratch before for my fuel pump to fuel filter line, but I just don't know what this one is called or where it runs. I did find this diagram: https://images.simplepart.com/images...ze/1N27101.png
I think it MAY be 13-49X, but I'm not sure.

mrfattbill Jun 12, 2025 05:25 PM

If you ware talking about the one with the white colored disconnect then that is 13-495

Bill

okcrystalx Jun 17, 2025 10:43 PM

Hi Bill,

Thanks! Ended up fabbing a new one.

https://cimg4.ibsrv.net/gimg/www.mia...27da0fa8b.jpeg
The line in the middle with the sleeve on it is the same line, I had to cut it and remove it from it’s bracket under the intake manifold and then route the new one from the spot on the passengers side of the engine bay (the top line on my previous post) to the spot in the picture, next to where the throttle body goes feeding the end of the fuel line. Very easy, if anyone ever needs to do it just get a length of 5/16 silicone or ETFE (etfe is OEM) fuel line, pop in Dorman 800080 or 800081 connectors on either end using a tube flaring kit and a heat gun on a line roughly the same length as the OEM and route it around. Hope that all makes sense to anyone who reads this thread and might need some information.


All times are GMT -4. The time now is 05:28 AM.


© 2026 MH Sub I, LLC dba Internet Brands