Just got my injectors back from cleaning for the GT.
All tested ok for leakage and spray pattern.
4 had the same capacity, 3 where 0,6% less than the 4 and one is 1,9% less.
Is this OK and no need to worry about the last one?
Some say that if they all are within 3% diff. on a street car that is Ok?

Also need advice on best way of mounting them back?
Should I put them into the intake before it goes back in the car or after?
First in the fuel rail or first in the intake?

Cheers/Peter

 

General practice is to lightly lube the O-rings with vasoline/petroleum jelly ( or WD-40 should do), then install four injectors with the clips into the fuel rail. The whole assembly then fits back into the intake ....

 

I do it the same way as Garth. Just watch the bottom o-rings as you work the injectors back into the manifold. Sometimes one can get pinched. You can prod it in with a gentle push with a screwdriver blade so that it doesn't hang up. Lube is essential. Anyway, it's pretty easy.

BTW, the rail clips are absolutely essential. That's one good reason to put them on first to make sure they are seated properly. I've seen the results of two fires when the clips were not installed by people who thought the rail itself contained the injectors well enough once bolted down. Not so. The injectors can drop a bit down into the manifold holes and then leak at the rail end.

 

Hi Garth and Bill,

good advice to get them in the rail first since a leakage there could be fatal...
When i removed the injectors I took the rail out first and then worked each injector out one by one.
After wiggeling and pulling three of them out, I tried to use a small screwdriver to help the bottom gasket out a little bit, doing that made a huge difference.
The remaining injectors came out soo easy
Will make sure to lube them before assembling.

Cheers/Peter

 

I pull them out still clipped to the rail, and 3/4ths will pop out that way. Sometimes one will come off the rail, stuck in the manifold. A little penetrant and a spark plug puller will get it out.