# Tomei 740cc injector:

**URL:** <https://forums.speedlife.net/t/tomei-740cc-injector/81672>\
**Category:** SON240sx Automotive\
**Created:** [September 27, 2004, 1:06am UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672 "2004-09-27T01:06:31Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jacky\_Ngai](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jacky\_Ngai](https://forums.speedlife.net/u/Jacky_Ngai)\
**Post date:** [September 27, 2004, 1:06am UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/1 "2004-09-27T01:06:31Z")

</div>

hi. can anyone tell me how to change the injector on a sr? and do i need any new parts when i install? thanks!

---

<div class="post-metadata">

**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\
**Post date:** [September 27, 2004, 10:34am UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/2 "2004-09-27T10:34:34Z")

</div>

you pull out the old ones, put in new o-rings and put in the new ones.

---

<div class="post-metadata">

**Author:** ![Jacky\_Ngai](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jacky\_Ngai](https://forums.speedlife.net/u/Jacky_Ngai)\
**Post date:** [September 27, 2004, 11:32am UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/3 "2004-09-27T11:32:46Z")

</div>

where can i get the new o-ring? how mcuh is it? thanks!

---

<div class="post-metadata">

**Author:** ![nocwage](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nocwage/32/5489_2.png) [@nocwage](https://forums.speedlife.net/u/nocwage)\
**Post date:** [September 27, 2004, 12:32pm UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/4 "2004-09-27T12:32:09Z")

</div>

Nissan, probably a few bucks each.

---

<div class="post-metadata">

**Author:** ![T23](https://avatars.discourse-cdn.com/v4/letter/t/9de0a6/32.png) [@T23](https://forums.speedlife.net/u/T23)\
**Post date:** [September 28, 2004, 8:20am UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/5 "2004-09-28T08:20:08Z")

</div>

OK thanks. But how i have to do when i change the injector. Do i need to disconnect the fuel before i take the injector out? Because i think there is a fuel inside. thanks!

---

<div class="post-metadata">

**Author:** ![mr200](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mr200/32/5495_2.png) [@mr200](https://forums.speedlife.net/u/mr200)\
**Post date:** [September 29, 2004, 1:39pm UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/6 "2004-09-29T13:39:13Z")

</div>

Pull out the fuel pump fuse. Start the car and let it die … that will release line pressure and drain the fuel.

Uhm, I’m assuming you have something to control the extra fuel?

---

<div class="post-metadata">

**Author:** ![Jacky\_Ngai](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jacky\_Ngai](https://forums.speedlife.net/u/Jacky_Ngai)\
**Post date:** [September 29, 2004, 10:51pm UTC](https://forums.speedlife.net/t/tomei-740cc-injector/81672/7 "2004-09-29T22:51:26Z")

</div>

yes i do. i have a e-manage with injector harness. i think it should be ok. :lol: thanks alot.