Quick fuel line question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ashikabi · 07-14-2018, 05:20 PM

Can someone educate me on what each of these fuel lines is for? I assume one is port injectors, direct injectors, and the last is evap? Which is which?

twag4 · 07-14-2018, 06:52 PM

Top is port, middle DI, and bottom is evap

Ashikabi · 07-14-2018, 08:13 PM

Quote:

Originally Posted by twag4

Top is port, middle DI, and bottom is evap

Thank you sir

Spuds · 07-14-2018, 08:18 PM

From the picture, your car seems to be missing something, but I can't quite put my finger on it...

Windshield wipers maybe?

Ashikabi · 07-14-2018, 09:01 PM

Quote:

Originally Posted by Spuds

From the picture, your car seems to be missing something, but I can't quite put my finger on it...

Windshield wipers maybe?

Yeah, just the blades though

Ashikabi · 07-14-2018, 09:09 PM

Say, since you replied first... Do the 2 injector lines get equal feed from the pump? I have to hook it up to a V8

Quote:

Originally Posted by twag4

Top is port, middle DI, and bottom is evap

Clipdat · 07-15-2018, 12:00 AM

Bottom is the one that gets used when you install a FF kit, correct?

Quote:

Originally Posted by twag4

Top is port, middle DI, and bottom is evap

twag4 · 07-15-2018, 10:43 AM

Quote:

Originally Posted by Ashikabi

Say, since you replied first... Do the 2 injector lines get equal feed from the pump? I have to hook it up to a V8

I’m not sure of that

TRS · 02-06-2020, 03:54 PM

Just since I was also searching for that information: The given assignment in Post #2 is incorrect. (Or I missunderstand the description) I know its late, but maybe important for other U's rwading this thread. Here is what the inspection manual says: (see chapter "port injector removal")

The top line in this picture (which is the most rear in the tripple plastic clamp) is fuel line #1, used for port injection.

The middel line (which is also the middle line in the tripple plastic clamp) is fuel line #2 which is the vapor/evap line.

The lower line (which is most to the Front in the tripple plastic clamp) is fuel line #3 used for DI.

Concerning the last question: #1 & #3 are both leading to the intank pump and gauge assembly. One line is coming from the pump and shortly after that it splits into two lines. Just T'ed. No valves or anything. So pretty much the same. Dont know the reason why they did it like that, maybe there is a Kind of Bad pulsation when DI and port are both working. But I'm not complaining, for a LS swap its perfect, no need to change for larger diameter fuel line.

@swappers: Be careful, not a good idea to missmatch those lines. You will float your charcoal canister through the EVAP vent line since its connected to the intank fuel pump if you T together lines #1&2. No fun to exchange that, since you need to remove the diff carrier assy to get to the evap canister.

Good thing is that you should not be able to run the (LS) engine if you did it like that. This beeing said, if somehow it should run (what I dont expect, but I wont try out) you will float your intake with fuel the second the Purge valve opens. Best case then would be a bent connecting rod, worst case is you have a expensive BBQ.

Fatboy412 · 09-17-2021, 12:43 AM

so if i use line #1 wht do i do with line #3 ?

Ashikabi · 09-17-2021, 06:56 AM

Quote:

Originally Posted by Fatboy412

so if i use line #1 wht do i do with line #3 ?

I Teed mine back together. You can probably just use one and cap the other though

Sent from my ONEPLUS A5010 using Tapatalk

02-06-2020, 03:54 PM	#9
TRS Senior Member Join Date: Nov 2019 Drives: 2013' Toyota 86 (EU spec) Location: Germany Posts: 160 Thanks: 32 Thanked 139 Times in 56 Posts Mentioned: 4 Post(s) Tagged: 1 Thread(s)	Just since I was also searching for that information: The given assignment in Post #2 is incorrect. (Or I missunderstand the description) I know its late, but maybe important for other U's rwading this thread. Here is what the inspection manual says: (see chapter "port injector removal") The top line in this picture (which is the most rear in the tripple plastic clamp) is fuel line #1, used for port injection. The middel line (which is also the middle line in the tripple plastic clamp) is fuel line #2 which is the vapor/evap line. The lower line (which is most to the Front in the tripple plastic clamp) is fuel line #3 used for DI. Concerning the last question: #1 & #3 are both leading to the intank pump and gauge assembly. One line is coming from the pump and shortly after that it splits into two lines. Just T'ed. No valves or anything. So pretty much the same. Dont know the reason why they did it like that, maybe there is a Kind of Bad pulsation when DI and port are both working. But I'm not complaining, for a LS swap its perfect, no need to change for larger diameter fuel line. @swappers: Be careful, not a good idea to missmatch those lines. You will float your charcoal canister through the EVAP vent line since its connected to the intank fuel pump if you T together lines #1&2. No fun to exchange that, since you need to remove the diff carrier assy to get to the evap canister. Good thing is that you should not be able to run the (LS) engine if you did it like that. This beeing said, if somehow it should run (what I dont expect, but I wont try out) you will float your intake with fuel the second the Purge valve opens. Best case then would be a bent connecting rod, worst case is you have a expensive BBQ. Last edited by TRS; 02-06-2020 at 04:18 PM.

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07-14-2018, 05:20 PM	#1
Ashikabi Senior Member Join Date: Aug 2014 Drives: 2013 FR-S Location: Northwest Iowa Posts: 7,354 Thanks: 454 Thanked 4,542 Times in 2,947 Posts Mentioned: 59 Post(s) Tagged: 5 Thread(s)	Quick fuel line question Can someone educate me on what each of these fuel lines is for? I assume one is port injectors, direct injectors, and the last is evap? Which is which?

07-14-2018, 06:52 PM	#2
twag4 Senior Member Join Date: Sep 2013 Drives: frs Location: The depths Posts: 749 Thanks: 355 Thanked 427 Times in 241 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Top is port, middle DI, and bottom is evap __________________

07-14-2018, 08:18 PM	#4
Spuds The Dictater Join Date: Apr 2017 Drives: '13 Red Scion FRS Location: MD, USA Posts: 9,427 Thanks: 26,109 Thanked 12,430 Times in 6,146 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	From the picture, your car seems to be missing something, but I can't quite put my finger on it... Windshield wipers maybe?

09-17-2021, 12:43 AM	#10
Fatboy412 Junior Member Join Date: Jan 2021 Drives: 2013 FRS Location: PA Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	so if i use line #1 wht do i do with line #3 ?

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