okay so I have a S5 motor with s5 manifolds and etc in an S4 car and I by spraying carb cleaner around all the vacuum areas I found out that it revs up when I spray at the primary injectors (s4 injectors on s5 rail) and it has new grommets! WTF! it just leaks like a bitch all the damn time, wont idle cause of it and runs like *** (but it needs to be re timed)

and yes the air bleeds are in there.

anyone got any ideas? because i'm out of them.

 

I just solved a bitch of an intake leak by pressurizing the intake. I bought a 3"pvc cap, drilled a hole into it and put a tire valve stem into it so that I could put air into the intake. You then use a compressor to pressurize the system with about ~10psi. Just don't pressurize too much. You will be able to hear a hissing sound where it is leaking. Mine was under my upper intake manifold.

Here is a link to what I am talking about. http://www.machv.com/macvleaktes.html

 

I found mine but I cant cure it, its not in the intake manifold.

you spray carb cleaner at the OMP block off plugs and lower injectors and you hear it rev up.

 

Do you have that plastic spacer that goes between the fuel rail mount and the block?

 

yes

 

I took it off, because it left too much of a "gap" between the injector and the grommet. Since it's off now, I don't believe the primary injectors can leak air past it now.

(S5 6 port turbo) I might try the leak down test.

 

You mean where the oil injectors used to be? Are they plugged off with a bolt or something? I used O-rings on those where I blocked mine off and it works fine, but my engine doesn't see boost.

 

I'll give that a try

I have the baznai racing S5 OMP block off plate kit and my engine is NA too. I have the thread plugs that fit with the oil injectors with some thread locker.

 

Oh yeah, if you can adjust your injectors while there on the rail there too loose. You shouldn't be able to move them or reposition them after there bolted down. That's how I figured out I had a leak. But also, I haven't bought new grommets yet either.

 

well it worked lol. Installing it "incorrectly" made it work, I put a little RTV near the injector seat and block area along with some rtv on the omp primary injector plugs with the loctite.


it now idles by its own! its a bit loopy from w/o the BAC and has some good smoke to it but it is a bit heavy on premix and needs to be re-timed. Anyone in our area got a timing gun? I'm 5 minutes north of you in Geneva.

 

I can lend you a timing gun. It'll only take literally 2 minutes to retime/check it. I'm in North Aurora, I could meet you where ever. PM if you want to set something up.

Glad to see that it worked. lol