Injectors? Fuel Rail? O-Rings?

[SOHCSE]

Hey all,I noticed something when I got home last night. Three of my injectors are covered with fuel. The car has been running quite rich lateley and I was planning on putting it up in the air on saturday. Its a 90 KA24e. Here are some images that I took. Also I noticed a little puddle of oil between the #1 and #2 injectors (from the front). Im not sure if that is just old buildup that has been broken down by the fuel, because I dont see any leaks around the head. It also looks like there is fuel all over the intake manifold. Good thing those arent on the exhaust side!

oil puddle



I also noticed that the boot for injector 2 was broken. Could that cause any issues?

injector leak

injector leak image 2



Anybody see this before? Im hoping it's just o-rings.

Thanks,Matt

[SOHCSE]

Well, I had an opportunity to check out the injectors with the car running. Looks like the o-rings to me. #1 injector is pumping fuel out around the fuel rail. I didnt see any of the other injectors leaking. Im just going to replace all of them. Autozone/Advance/NAPA which is the best choice for getting the o-ring kits. I havent been happy with a lot of Autozone parts in the past.

Ill just add this to the AIV removal, Z32 fuel filter, and oil change that Im doing on Saturday. Have a rattle too, hopin its only a heat shield, but with my luck lately, its prolly the top chain guide.

By the way, thanks for the archives here, I have been lurking in the forums for about 4 months now, and normally find my answers by searching. Pro-kit springs, KYB shocks, 300z brakes and body and paint this winter, will have lots of pics. Maybe Ill give back by doing a step by step on one or more of them...

[InsanityInc]

yeah, it's definitely just your Orings. an injector leak won't leak fuel outwardly unless your injector casing is cracked or something.

[SOHCSE]

Ordered the kits from Advance Auto.1990 KA24e Part Number:(Beck/Arnley) 1580372

That is for the Seal Kit, not just the one O-Ring.

Hope that helps someone else.

How about that second boot being broken? Is that going to cause issues?
Modified by SOHCSE at 10:08 AM 8/19/2005

[FliMSiCaL]

mine have been like that for a while now...hasnt caused any problems. While your at it, take the wire connectors off and clean the crap outta the terminals...they have a habit of corroding. Also, very carefully examine the o-rings, i know for a fact that the rings from autozone and napa say for ka24e, but don't fit, i had to steal mine from a head rebuild kit that we didn't need them in.

[SOHCSE]

O-rings fit beautifully. Got the oil changed, Fairlady fuel filter, AIV removed, orings changed today. Talk about night and day difference. Idle is rock-steady. Only issue I had was getting all four injectors back in. had everything bolted together and started it up. Loud screeching sound, engine die. Fuel all over intake side, so I watched the replaced injector - no leak. look back to the #4. I never got it in and it was spraying all over. heh. oops. Anyways, got that fixed, runs great.


Modified by SOHCSE at 3:38 PM 8/20/2005