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How can I splice into the fuel line near the connection the the fuel rail to put a T connection so I can check my pressures?

Tiny
UHSNOEBIRD
  • MEMBER
  • 2005 TOYOTA CAMRY
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 333,000 MILES
I am wanting to put a T connector so I'll be able to check my fuel pump pressures with my fuel pump gauge. What is the size of the inside diameter of the fuel line to the fuel rail?
Sunday, April 25th, 2021 AT 12:08 PM

14 Replies

Tiny
HARRY P
  • MECHANIC
  • 2,291 POSTS
Hello. AllData actually has instructions on doing this included in their fuel pressure test instructions. I'm attaching that in the images below. Hope it helps. Let me know if you need anything else.
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Sunday, April 25th, 2021 AT 5:04 PM
Tiny
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If I knew the size of the T fitting that would be very helpful along with the info. You sent me.
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Sunday, April 25th, 2021 AT 6:09 PM
Tiny
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I have a fuel pressure gauge if I just knew the size of the T fitting.
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Sunday, April 25th, 2021 AT 6:57 PM
Tiny
HARRY P
  • MECHANIC
  • 2,291 POSTS
I've dug and dug but can't find any definitive information on that T joint other than it comes in a set of special Toyota tools. You could try calling the dealership and showing to someone in service. Or my other suggestion would be to pull off the line and manually measure it. Then buy a few Ts that are closest to your measurement asking with a few clamps and do a little trial and error. I know it's not the definitive answer that you'd like, but it's the best I can do without having the car in front of me to personally measure it.
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Sunday, April 25th, 2021 AT 8:13 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
Are those gas lines hard to remove from the fuel rail on my 2005 Toyota Camry LE or do you know and I'll attempt to take it lose to measure it.
I am wanting to cut the rubber hose that goes to the fuel rail and put me a T fitting that has a Schrader valve in it. I've already done my 1997 Nissan truck that way and the T connection is there for me to check my fuel pressures anytime I need to.
I appreciate you helping me so much. Thank you
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Monday, May 10th, 2021 AT 1:51 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,310 POSTS
Hi,

The line isn't too hard to remove, but it does require a special tool. Actually, I have made the tool out of plastic prior to getting a set.

If you look at the directions below, they explain how to disconnect the line.

Let me know if this helps or if you have other questions. Also, there is a good chance that a parts store will lend/rent one to you.

Take care,

Joe
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Wednesday, May 12th, 2021 AT 6:39 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
Okay, thank you.
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Wednesday, May 12th, 2021 AT 6:47 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

No problem. If you have a chance, let us know how things turn out or if you have other questions.

Take care,

Joe
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Wednesday, May 12th, 2021 AT 9:09 PM
Tiny
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Joe, is the gas line to the fuel rail rubber all the way through on this car listed above LE model? I called Toyota and they said they didn't know the inside diameter of this gas line. Thank you
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Monday, May 17th, 2021 AT 1:00 PM
Tiny
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Is the rubber gas hose going to the fuel rail rubber all the way through or does it have metal in the middle of it? I meant to say in the prior statement.
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Monday, May 17th, 2021 AT 1:05 PM
Tiny
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I have intentions of cutting it into.
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Monday, May 17th, 2021 AT 1:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

It came with a steel fuel line under the vehicle which at both ends changes to rubber. The fuel line should be 5/16". I'm surprised the dealership didn't know that.

Regardless, let me know if I can help.

Take care,

Joe
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Monday, May 17th, 2021 AT 8:42 PM
Tiny
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When I get this to working I'll send you pictures of it connected to the fuel line.
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Monday, May 31st, 2021 AT 2:58 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Thanks, I would appreciate it. Let me know if I can help in any way.

Take care,

Joe
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Monday, May 31st, 2021 AT 8:40 PM

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