FIC 650's

[dj_lethrow]

Alright well they have been in my car for a while and usually when I get a lil higher in the rpms it bucks like fuel cut....but it's probably a boost leak. I have a pic of the injectors tell me if this is right? Mainly looking at the lower inejctor o ring. I dont know if that is sealing. They are the stock replacement ones.

You must be logged in to view this image or video.

 

[project_tsi]

Here are how my FIC 650's were hooked up.

 

[dj_lethrow]

Thanx man...I think I know what I'am doing wrong now

 

[oldman]

Thanx man...I think I know what I'am doing wrong now

Make sure you lubricate the o-ring before you insert them into the rail so they don't tear, a very common mistake.

 

[dj_lethrow]

I used some dialectric grease...but they wont go as far into the cylinder head. They stick out a lil farther. Is it possible to use the stock bottom o rings with the FIC injectors?

 

[daren_p]

Its been awhile since I installed my FIC's but aren't you guys using the wrong lower seal? That looks like the factory style lower seal. With the FIC's they use the seal that is the same as you have on the top of your injector. They claim these are supposed to seal better then the factory ones that tend to dry out. When your installing the injectors into the rail use motor oil. You have to be careful with other lubricants as some of them react with different orings causing them to swell.

Edit: Or are those the new Viton lower seals?, they look like them in the second post but the origional post looks like the stock seals?

 

[rowlex]

I used some dialectric grease...but they wont go as far into the cylinder head. They stick out a lil farther. Is it possible to use the stock bottom o rings with the FIC injectors?

No, they wont fit over the "lip" that the FIC's have. Take them out

 

[dj_lethrow]

Alright well I will order some new ones from FIC and hopefully this helps with some issues the car has been having. I dont think they really were able to seal that well so probably why it's like studdering when I give it more than half throttle under boost. Kinda wierd though considering these are 650's my settings on the safc2 are around -10. Less knock when it's there so I'am hoping with the new seals the car will run better.

 

[project_tsi]

Alright well I will order some new ones from FIC and hopefully this helps with some issues the car has been having. I dont think they really were able to seal that well so probably why it's like studdering when I give it more than half throttle under boost. Kinda wierd though considering these are 650's my settings on the safc2 are around -10. Less knock when it's there so I'am hoping with the new seals the car will run better.

Well, did you do a boost leak test? If so, was it obvious it was comming from the injectors?

And yes, they are the Viton lower seals in my injectors.

 

[blackGSX2g]

Yes, as Dan said the stock lower O-rings will not fit over the FICs. I had my FICs shipped with the new Viton seals for an additional $14.

You can find your new seals here if you haven't found them already:

http://www.fuelinjectorclinic.com/cart/viton_sealkit.htm

If your seals are way off, your car makes an incredibly loud sucking/pulsing noise when you are idling. If it is just slightly off, you will not hear any difference, but it would cause a massive boost leak leading to the symptoms you describe.

 

[dj_lethrow]

Exactly the ones I ordered. I'll be doing a boost leak test after this, but all of the symptoms started after I put these injectors in so probably a good chance this is what it could be. Once they are in i'll post back to keep the post updated.

 

[dj_lethrow]

Alright, finally got my seals in and installed them, but the car runs pretty crappy now. I got the FIC viton lower seals, but mine go on the first notch of the injector not the 2nd. I tried the 2nd notch and half the o-ring stuck out and you could hear it hiss. Car runs horribly bad right now. I cant boost leak test right now, but I'am wondering did they not seal? Or are they suppossed to be on the 2nd notch cause then I would have to eliminate the fuel rail spaces to get it to work. Car ran good before I took it all out so I dont know.WTF

 

[project_tsi]

You say the injectors sit out a little bit longer? By any chance are all of the stock o-rings removed from the head?

Install the seals just like in my pics. Mine required no excess force to put on the seal. The seals simply press on and stay on.

Leave the fuel rail spacers on, do not remove them.

Do a boost leak test and make sure they are not leaking.

If the test reveals no leaks, then we can be sure the injectors themselves are no longer the problem.

What other fuel mods do you have? Fuel pump, AFPR, etc.

Other than the S-AFC, what do you have to tune with? A keydriver chip with injector compensation may be what you need if you don't have one. 650's can be difficult to tune on a S-AFC alone.

 

[dj_lethrow]

All the stock seals are gone. I tried putting them in like the way you have them in the picture, but they wont go in as far with the way they are like that and they leak. Are you still using that upper insulator I think that's what it's called. Because without those maybe it would fit better.

As far as fuel stuff I have safc2, 650's of course, aeromotive fuel pressure regulator, walbro 255hp fuel pump. Then to tune I'am using my logger.

 

[sweet97]

I've got FIC 950's and my lower seals just go over the end where it flares out. It seems I have the WRONG seals! Thanks for this thread and info. I will order my O-rings from FIC direct. Viton for sure? Last longer? Thanks, Mark

 

[kanderson111]

All the stock seals are gone. I tried putting them in like the way you have them in the picture, but they wont go in as far with the way they are like that and they leak. Are you still using that upper insulator I think that's what it's called. Because without those maybe it would fit better.

As far as fuel stuff I have safc2, 650's of course, aeromotive fuel pressure regulator, walbro 255hp fuel pump. Then to tune I'am using my logger.

Yes with the FIC 650's you must use the spacers/insulators, they are there for safety and should be there. Mine are installed just like the pictures above and I've had no problems, and I just have the cheap FIC black seals not the vitrons.

Sorry wish I could help more....

 

[sweet97]

Yes with the FIC 650's you must use the spacers/insulators, they are there for safety and should be there. Mine are installed just like the pictures above and I've had no problems, and I just have the cheap FIC black seals not the vitrons.

Sorry wish I could help more....

I found a couple of old CORRECT FIC lower o-rings and they fit great but it did ntake a bit of push to get the inj into the head. I would suggest getting the injectors into the head first and then have someone help you get the rail onto them. Man this thread saved me some big trouble as I got the wrong set of lower O-rings, thanks guys, Mark

 

[Nanan]

It is best to go with Viton seals because they will not deteriorate in alcohol, xylene, or most other fuels/additives. Viton also resists normal degradation from oxidization aka hardening/dry-rotting

 

[dj_lethrow]

I found a couple of old CORRECT FIC lower o-rings and they fit great but it did ntake a bit of push to get the inj into the head. I would suggest getting the injectors into the head first and then have someone help you get the rail onto them. Man this thread saved me some big trouble as I got the wrong set of lower O-rings, thanks guys, Mark

I'll try and give that a shot. Haven't been able to work on the car for a few days..stuck inside with the flu. Has to be a small leak with them sealing. If it still doing this then the only other thing I can think of is possibly the ecu? When I was working on the car before I got my new seals the battery got arced and threw some sparks. Checked all the fuses they looked good. When I did try and drive the car if I gave it just a lil throttle not even half the whole car would like clatter and shake like crazy. Kind of like it was having a fit. It would go back to normal then back to its messed upself. Cant even boost yet so I have no idea.

 

[dj_lethrow]

Took the ECU out of the car to check and make sure I didn't blow any caps. Everything is good in there. Has such wierd reactions. I can drive it normal for a little while then it starts what feels like missing hardcore. Barely moves at all. Felt like it was running on one cylinder. Then the next day I start it up to try again...starts out well then all goes to hell.

 

[sweet97]

If you have the Iridium plugs change them to regular NGK BPR6ES and set the gap around .025". I run high boost and have my gap at .022". Have you got the spacer at the top? There should be no reason for the FIC's not to fit correctly. I just ordered a set of correct lower O-rings that I expect tomorrow or saturday. I'm sure they will install/fit fine. Try a new set of plugs and NGK blue wires for about $40. work great, better than Magnacores did for me. Mark

 

[dj_lethrow]

Well right now I'am running ngk 7's. The 6's Seemed to run hotter in the summer and more knock with those. I think I'am going to try new wires. Could very well be that.

 

[sweet97]

Try the NGK Blues, great spark. I get mine from www.DSMotorsport.com but there may be a vendor closer to you. mark