Leaking Injectors....

[GODZ1LLA]

Covered a million times on here before and i have done a search as well..

But basically my new r33 gtr skyline's injectors are leaking from around 3 of them, 2 being at the top of the injector and the other from the bottem..

One of the ones that leaks from the top (nearest to front of engine) just pours out constantly..

Whats the best solution to curing this? car is stock with stock injectors.

Should i just take it to an injector specialist in bunbury (although i dont any) can anyone reccomend anyone? so they can clean and put new seals on (hoping that they are not cracked) and clean them...

Or should i just buy later injectors off a r34 gtr???

[The Dan]

GTR injectors will always leak eventually. If you bought new ones, take them back for a refund. If you bought second hand ones, then buyer beware. If you buy another set of GTR injectors, they will ALSO leak eventually. They all do, there is no way to fix them.

Before ditching them, though, check the top and bottom seals to be sure it is the injectors fault. Usually they leak from the small holes near the top on the side when the car is running. They will not leak when the car is not running.

[GODZ1LLA]

Just bought the car and they are leaking they leak when the car has been turned off and whilst the car is running???

[GTRsean]

They would leak when engine is off due to fuel pressure left in the pressure side of the fuel system.

Once the pressure has escaped it should stop. If it's definately not the orings and it is the injectors, might be a good time to get some new injectors (bigger) and a tune to suit?

[The Dan]

If you turn the key to the on position and you start getting leaks, then try replacing the o-rings first. Replace both top and bottom. You can get these from any injector cleaning place or mobile guy or from Nissan at approx $1 each I think (I don't know exact price as I buy them in bags of 200)

If the injectors leak from the small holes on the side near the top, then they are fubar and you will need to buy new ones.

For a basic street car, just get some siemens ~500cc and a Nistune or something equivalent. If you are after something more serious, talk to your tuner or mechanic more about the size they recommend and the brand they recommend.

[GODZ1LLA]

Just turned the key to the on position (without the engine running) and straight away fuel on 3 of the injectors started to leak fom the top down does this mean it will be the o rings then?

[scotty nm35]

Sounds like it. If they have perished, I would be changing all the orings. Make sure you use some lubricant on them when you re-install, I use a little silicone spray.

[MrStabby]

  On 04/04/2011 at 1:46 PM, GODZ1LLA said:

Just turned the key to the on position (without the engine running) and straight away fuel on 3 of the injectors started to leak fom the top down does this mean it will be the o rings then?

If its right at the top near the rail then yeah, probably o-rings. If you're not sure, just change them anyway because they're cheap and its an easy job. Search the DIY - i did a write up. Interestingly, i had to remove my rail recently and just pulling it out and reinstalling it was enough to kill 2 orings FFFUUUUU.... Probably should have pulled all the injectors out of the rail and re-lubed them.

[GTRsean]

Workshop says to use engine oil to lube orings....

[DVS JEZ]

I use k y

[GODZ1LLA]

Well today my injectors coem from america..

Anyway used the guide on here to fit em all is well on idle..

As soon as i just drive normally it has a miss like its trying or should i say nearly running on 5 cylinders, put your foot down and that goes away although on full boost boost it does leave a cloud of black smoke which it didnt used to do...

Anyway my question is does this mean one or more of the new to me std gtr injectors aint flowing enough??

Should i just take em all of again and get em flo tested or could this be somat else?

Note it didnt miss like this when the old leaking injectors were in...

[DVS JEZ]

What injectors did u get?

[MrStabby]

  On 21/04/2011 at 12:50 PM, GODZ1LLA said:

As soon as i just drive normally it has a miss like its trying or should i say nearly running on 5 cylinders, put your foot down and that goes away although on full boost boost it does leave a cloud of black smoke which it didnt used to do...

Anyway my question is does this mean one or more of the new to me std gtr injectors aint flowing enough??

Should i just take em all of again and get em flo tested or could this be somat else?

Note it didnt miss like this when the old leaking injectors were in...

What boost are you running? Are the replacement injectors new or used?

Black smoke = rich mixture, which you'd expect on a stock ECU, especially if you've raised the boost.

[GODZ1LLA]

Same stock injectors 2nd hand std boost around 1bar, its the 5 cylinder soudn i dont like....

[MrStabby]

Getting them cleaned and tested would a sensible next step.

Stock ECU at 1 bar you expect to see black smoke.

[GODZ1LLA]

I though 1bar was stock??

the 5 cylinder type noise is only there when your really gentle with the throttle and at low revs..

[Shea Mary]

  On 03/04/2011 at 12:26 PM, Elite Racing said:

GTR injectors will always leak eventually. If you bought new ones, take them back for a refund. If you bought second hand ones, then buyer beware. If you buy another set of GTR injectors, they will ALSO leak eventually. They all do, there is no way to fix them.

Before ditching them, though, check the top and bottom seals to be sure it is the injectors fault. Usually they leak from the small holes near the top on the side when the car is running. They will not leak when the car is not running.

I also think so.

[evers.]

  On 04/04/2011 at 1:21 PM, Elite Racing said:

If you turn the key to the on position and you start getting leaks, then try replacing the o-rings first. Replace both top and bottom. You can get these from any injector cleaning place or mobile guy or from Nissan at approx $1 each I think (I don't know exact price as I buy them in bags of 200)

Just tried this out then and i can hear a leak coming from the first injector, I cant really tell weather it's coming from the top or bottom though.

I cant visually see or smell fuel but just a leaking air sound?

[LANDSCRIBBLE]

you want to use a silicone lubricant on most rubber O'rings or seals. gel or aerosol form doesnt matter. it wont perish the rubber over time like vaseline and other stuff.