# donut brass fitting in fuel line

**URL:** <https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470>\
**Category:** SON240sx Automotive\
**Created:** [March 6, 2006, 5:59pm UTC](https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470 "2006-03-06T17:59:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![luka](https://avatars.discourse-cdn.com/v4/letter/l/a587f6/32.png) [@luka](https://forums.speedlife.net/u/luka)\
**Post date:** [March 6, 2006, 5:59pm UTC](https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470/1 "2006-03-06T17:59:57Z")

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hey,

while working on the car a small brass donut shapped fitting in the fuel line by the rail fell out.

I don’t know if it came from the return line or feed line… anyone know what the hell I’m talkin’ about? heh

also… I forgot which is the return and which is the feed line on the rail… haha. they’re right beside either and I put the project on hold for a few days, got back, and now I can’t remember 😕

please, and thanks.

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**Author:** ![luka](https://avatars.discourse-cdn.com/v4/letter/l/a587f6/32.png) [@luka](https://forums.speedlife.net/u/luka)\
**Post date:** [March 7, 2006, 4:48pm UTC](https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470/2 "2006-03-07T16:48:47Z")

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anyone? please, I went through the FSM and the fuel rail illustration is absolutely useless / doesn’t mention anything about the fitting.

thanks

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**Author:** ![luka](https://avatars.discourse-cdn.com/v4/letter/l/a587f6/32.png) [@luka](https://forums.speedlife.net/u/luka)\
**Post date:** [March 11, 2006, 9:49am UTC](https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470/3 "2006-03-11T09:49:35Z")

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so no one has modified an S14 fuel system hmm?

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**Author:** ![luka](https://avatars.discourse-cdn.com/v4/letter/l/a587f6/32.png) [@luka](https://forums.speedlife.net/u/luka)\
**Post date:** [March 16, 2006, 2:55pm UTC](https://forums.speedlife.net/t/donut-brass-fitting-in-fuel-line/93470/4 "2006-03-16T14:55:37Z")

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so I figured out what it is, it’s a pulsation damper. most fuel rails it looks like the image below (feed connects with a banjo) but I guess for the Zenki nissan decided to go medival.

![http://www.mazdatrix.com/pictures/c-intake/pulsdam.jpg](http://www.mazdatrix.com/pictures/c-intake/pulsdam.jpg)

this thing is impossible to miss when modifying an S14 Zenki fuel rail, I’m _suprised_ no one has come across it.