C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Testing for leaking injectors

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Old Nov 8, 2014 | 12:00 PM
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Default Testing for leaking injectors

Hey guys, I already pulled the fuel rail and put paper under the injectors to see if any are leaking. Problem I'm having is I can't conect the fuel injector connectors to the injectors. Not enough slack. Any help is appreciated. 93 LT1
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Old Nov 8, 2014 | 12:02 PM
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That's what I can't get to connect.

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Old Nov 8, 2014 | 01:43 PM
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Or do these connectors have to be connected to see if any injectors are leaking?

Last edited by 1993C4LT1; Nov 8, 2014 at 01:54 PM.
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Old Nov 8, 2014 | 03:01 PM
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Originally Posted by 1993C4LT1
Or do these connectors have to be connected to see if any injectors are leaking?
no way to raise the whole main inj. harnes? so you can plug in that connectors.Do you try to force a little bit the main inj. harnes?
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Old Nov 8, 2014 | 03:24 PM
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If I force it, it feels like it will break. I put the key in accessory mode, and saw a small gas leak on one of my papers. I put my finger under every injector, and felt fuel on 3 of them. But I was moving the fuel rail. Not sure if they leaked because of me moving the fuel rail. Sorry, I'm a novice to all this stuff.
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Old Nov 8, 2014 | 03:47 PM
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the main wiring harnes CAN't break,just pull it a little ,you need no more than 2 inches,i'm a TPI guy,but the wiring harnes it's usually free in that position,may be a little bracket somewhere.plug the injectors,turn the key and prime the system,put shop towels under there...have a fire extinguisher handy ( as a preventative measure,don't be scared).
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Old Nov 8, 2014 | 04:18 PM
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It worked
About to check for leaks
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Old Nov 8, 2014 | 04:50 PM
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Oh yeah, one leaked a lot. Thanks man
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Old Nov 8, 2014 | 05:16 PM
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good! you find it...
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Old Nov 8, 2014 | 08:36 PM
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Why bother? Send it off for testing. Lets say it isn't leaking but has a collapsed basket filter like one I had. How would you know? This is exactly why I send mine off every few years. Further to that, stock Multecs are the first thing I would toss in the trash. Without a flow bench, how will you know if the injector is having good spray pattern and similar flow numbers to the rest?
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Old Nov 8, 2014 | 09:35 PM
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Yeah, it has the Multecs. So I figure they leak and are 21 years old. I'm confused, are you saying may as well replace them?
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Old Nov 8, 2014 | 09:41 PM
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Originally Posted by 1993C4LT1
Yeah, it has the Multecs. So I figure they leak and are 21 years old. I'm confused, are you saying may as well replace them?
I would. They are not worth the money to clean and test. You can get Bosch 3 a reman ones pretty cheap, relatively
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Old Nov 8, 2014 | 10:26 PM
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Originally Posted by aklim
I would. They are not worth the money to clean and test. You can get Bosch 3 a reman ones pretty cheap, relatively
I put these 24 lb Bosch 3 in mine

Call the number in picture ask for Jon from fic

https://www.corvetteforum.com/forums...questions.html
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Old Nov 8, 2014 | 11:16 PM
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Thanks! That's what I will do
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Old Nov 9, 2014 | 10:12 AM
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be sure to use the green rubber o rings, I think they are better.
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Old Nov 9, 2014 | 11:24 AM
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Originally Posted by ghoastrider1
be sure to use the green rubber o rings, I think they are better.
Will do.
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Old Nov 9, 2014 | 06:44 PM
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Originally Posted by 1993C4LT1
Will do.
When FIC did my injectors, they always sent them back with O-rings.
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Old Nov 9, 2014 | 09:57 PM
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Anyone tried their Bosch 4 injectors? Just curious. Again, will call him tomorrow and ask questions. Just wanted to ask the forum members.
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Old Nov 9, 2014 | 10:10 PM
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Originally Posted by 1993C4LT1
Anyone tried their Bosch 4 injectors? Just curious. Again, will call him tomorrow and ask questions. Just wanted to ask the forum members.
I think those required tuning? Not sure.
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Old Nov 10, 2014 | 03:18 AM
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When you do an injector leak down test you don't need to connect the injectors. You're doing a mechanical test to see if the pintle in the injector is sealing, not an electric test.
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