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Old 09-22-2012, 06:31 AM   #1
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Default New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!

Hi,

it's days like these that make me sometimes wish I would have a non-DIY car...

I installed my new ID 725CC injectors today, but my fuel rail is not sitting flush on the "bosses" (?) when I install it. See attached pictures...

I installed the spacers at the fuel rail - but when I tighten the rail, the rail just goes flush on the top of the holding boss, not at the bottom, there are ~2mm missing... WTF? All the injectors are properly seated...

Please help me out - what could I possibly be doing wrong?

Did anyone else have this problem?

Car is a B6 with DIY Dual-feed fuel rail...



See the angle at which the fuel rail is sitting:


Injectors:








Attached Thumbnails
New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_02.jpg   New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_04.jpg   New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_05.jpg   New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_06.jpg   New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_07.jpg  

New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_08.jpg  

Last edited by Zaphod; 09-23-2012 at 12:50 PM.
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Old 09-22-2012, 11:59 AM   #2
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Who did you buy them from?
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Old 09-22-2012, 12:06 PM   #3
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Quote:
Originally Posted by hustler View Post
Who did you buy them from?
949racing
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Old 09-22-2012, 12:37 PM   #4
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Are the rail spacer thingies on the head the same size as the 1.8 American spacers?
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Old 09-22-2012, 12:41 PM   #5
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Can you rotate the injectors freely? Can you not push it flat by hand? Do you have a caliper to check the sizing against your old injectors?
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Old 09-22-2012, 01:54 PM   #6
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Quote:
Originally Posted by hustler View Post
Are the rail spacer thingies on the head the same size as the 1.8 American spacers?
Yes, I was running the 460cc Supra injectors before - no problem...
Just checked at ILMotorsport - they are the same for all Miatas, NA, NB, NBFL.

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Can you rotate the injectors freely? Can you not push it flat by hand? Do you have a caliper to check the sizing against your old injectors?
Yes they rotate nicely. No I can't push it flat by hand, not even with the screws, the injectors start to tilt then between the injector body and the aluminium spacer on top.
I checked them by eye with my old 460cc RX-7 injectors and they seem to match.
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Old 09-22-2012, 02:35 PM   #7
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lube up the gaskets on the injectors with oil and try again.
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Old 09-22-2012, 02:42 PM   #8
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I would never try to install injectors without lubing them... Never go in dry!
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Old 09-23-2012, 12:30 AM   #9
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Are the old o-rings still in?
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Old 09-23-2012, 03:21 AM   #10
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Pull the injectors out and photograph the pintle ends for me (the end where fuel comes out). ID probably left the hard rubber gromets on at the ends.
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Old 09-23-2012, 04:08 AM   #11
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I already took pictures of the injectors, but don't have them at hand atm.

But I think this could be it. There are little rubber gromets, about half the size of the rubber isolators above them. The gromets have a conical shape. I post the pics asap.
How would one get the gromets of the pintle ends? Just pull? They do look fixed on the metall...?

Thanks
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Old 09-23-2012, 05:53 AM   #12
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I'm not sure if it is the same thing but I removed the ring on ev14s with pliers.
Attached Thumbnails
New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-p1030018.jpg  

Last edited by sturovo; 09-23-2012 at 02:26 PM.
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Old 09-23-2012, 09:48 AM   #13
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What method did you use to install the injectors/rail? I just installed a set yesterday on mine, I did the following:
Removed old injectors, all 3 seals came out with each of my factory injectors.
Cleaned out the manifold area where the injectors seat, there was some dust/grime buildup in each of the holes.
Put on all 3 new seals on each injector and applied liberal amounts of clean oil to each.
Slid the new injectors into the fuel rail.
Installed the fuel rail with new injectors as a unit into the manifold.
Once installed, I inspected the bottom grommet of each to insure it properly seated without pinching the rubber seal.
Rotated each injector to make sure none were binding in any manner.
Finally I snugged down the bolts to hold it in.

This is probably worthless info, but it's what I did and things are working great for me with no leaks.

I was a little surprised how obnoxious the install was. Easy, but annoying. I kept thinking to myself how many curse words I'm going to use next year when I have to change back to stock for emissions inspection, then change back again once it's over.
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Old 09-23-2012, 12:49 PM   #14
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O.k. Injectors are in, the rubber gromets were the solution. I removed the gromets with a plier and the injectors went in as supposed...

I am going to post some pictures for future reference tomorrow.
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Old 09-24-2012, 02:37 AM   #15
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Here are the pictures for future reference:

That is how the injectors came:



That is with the rubber gromets removed - you still need to wiggle them a bit around to make them sit properly.



In case somebody else has this problem...
Attached Thumbnails
New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_09.jpg   New ID725CC injectors - fuel rail not sitting flush... WTF? SOLVED!-id725_10.jpg  
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Old 09-24-2012, 04:12 AM   #16
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FYI, this is only an issue if you/your vendor orders the generic ID725/ID1000s. The IDs we sell are Miata-specific and they have the gromet removed.
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Old 09-24-2012, 04:57 AM   #17
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Quote:
Originally Posted by Savington View Post
FYI, this is only an issue if you/your vendor orders the generic ID725/ID1000s. The IDs we sell are Miata-specific and they have the gromet removed.
Well, 949racing also says they are Miata-specific...
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Old 09-24-2012, 05:15 AM   #18
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Quote:
Originally Posted by Zaphod View Post
Well, 949racing also says they are Miata-specific...
That's what we order from Tony, Miata specific. I'll mention this to him.
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Old 09-24-2012, 09:05 AM   #19
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Hey Sav/Emilio,

Do either of you stock (or can easily order) the little blue spacer/adapter things? I have a set of Subaru ID1000's that come without them and am 99% sure they will work on a miata if I simply get the adapters.
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Old 09-29-2012, 03:39 AM   #20
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I don't, but I think ID sells them separately.
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