Fuel injector question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

musicmaniac · 07-16-2009, 11:03 PM

Long story short i have two fuel rails both with 4 270cc dohc ka injectors. My problem is that one rail has cream color plastic nipples at the ends and one of them is broken like someone dropped the injector and the nipple cracked.

The second rail is similiar except instead of complete circles all four of the injectors have just a circle with 4 little pegs that dont really seem to do anything. On the peg rail i have one of those little pegs broken off. So what is the point of these little nipples on the end of the injectors.

I am assuming they are for sealing to the intake manifold. Would it be alright if i just mix and match the rail and have four unbroken nipples or what should i do. I can provide pics if necessary.

Edit: Here is a really good picture of what i mean. Top being the four peg and the bottom being the complete circle nipple.

musicmaniac · 07-17-2009, 09:49 AM

anyone have any ideas

burnsauto · 07-17-2009, 09:56 AM

they are supposed to help with atomization, but they will run just fine if the tabs are broken. You CAN mix and match, just as long as you know they are the same flow rate. You may want to send them to RC Injectors and send them out to have them bench flow tested, make sure they're not clogged, dirty, and don't need replacement.

Fuel Injector Cleaning

projectRDM · 07-17-2009, 10:05 AM

We've discussed this numerous times before.

'Pintle caps' are what you're referring to.

BustedS13 · 07-17-2009, 10:09 AM

i pulled a dead injector a few days ago. it probably looks similar to yours:

as far as i know the ones with one solid piece and the ones with the four pointy things are both 270cc and do the same job... but i've never seen a broken one with the one solid pintle cap. i'm going to get a set of four of them together and send them off for cleaning, i recommend you do the same

protip: the junkyard won't find a bag of injectors hidden in your underwear

landins13 · 07-17-2009, 10:20 AM

the yellow one looks like a hks 550 injector

burnsauto · 07-17-2009, 12:21 PM

Quote:

Originally Posted by projectRDM

We've discussed this numerous times before.

'Pintle caps' are what you're referring to.

ah thanks, i was trying to think of the name of them. As always, you come to the rescue.

yukon · 07-18-2009, 02:56 PM

Quote:

Originally Posted by projectRDM

We've discussed this numerous times before.

'Pintle caps' are what you're referring to.

The pintle cap does NOT help with atomization. The pintle cap is there to ensure the lower o-ring does not slip which could result in hydrolock. If you dont know, then dont answer.

projectRDM · 07-18-2009, 04:16 PM

Quote:

Originally Posted by yukon

The pintle cap does NOT help with atomization. The pintle cap is there to ensure the lower o-ring does not slip which could result in hydrolock. If you dont know, then dont answer.

Nice reading skills, asshole. Nowhere did I say that. I said that the part the OP was referring to was called the pintle cap, that's it. Therefore he could do more research by actually using the correct term, instead of saying 'the thing with little prongs' or whatever he decided to use.

yukon · 07-18-2009, 06:10 PM

Quote:

Originally Posted by projectRDM

Nice reading skills, asshole. Nowhere did I say that. I said that the part the OP was referring to was called the pintle cap, that's it. Therefore he could do more research by actually using the correct term, instead of saying 'the thing with little prongs' or whatever he decided to use.

Thank you , Captain obvious. If we want the god blindingly obvious, we always have you standing by with your useless generic answers. You take every opportunity to insult people when you have nothing but a very superficial understanding of mechanics which you gained from dismantling cars to sell parts. I have no problem with people with low IQ's but I do have a problem with retards who don't know their place in this world.

bl3ujay07 · 07-18-2009, 07:10 PM

^^^Wow, wtf with him. ProjectRDM always helping the forums. Take your pissy ass i-know-everything out and go back to nico. We dont need smart asses like you in this forum.

GSXRJJordan · 07-18-2009, 08:45 PM

Quote:

Originally Posted by BustedS13

i pulled a dead injector a few days ago. it probably looks similar to yours:

This is how NOT to remove your injectors...

Quote:

Originally Posted by yukon

Thank you , Captain obvious. If we want the god blindingly obvious, we always have you standing by with your useless generic answers. You take every opportunity to insult people when you have nothing but a very superficial understanding of mechanics which you gained from dismantling cars to sell parts. I have no problem with people with low IQ's but I do have a problem with retards who don't know their place in this world.

Russ has been helping since the dawn of time - you, just joined a fucking month ago. His answers are consistently on-point and comprehensive - when I post a question in a thread, it's him I'm hoping will answer above all. Your answer was also helpful, but trying to knock him down a peg won't earn you any friends around here.

BustedS13 · 07-19-2009, 01:49 AM

Quote:

Originally Posted by GSXRJJordan

This is how NOT to remove your injectors..

it's also not how it was done. i use vice grips to turn them and then pop them out with a washer and a flathead.

GSXRJJordan · 07-19-2009, 02:40 AM

Quote:

Originally Posted by BustedS13

it's also not how it was done. i use vice grips to turn them and then pop them out with a washer and a flathead.

Lol, cool, but shouldn't be turned either. If you pull them straight out with a flathead, you can usually re-use the O-rings. Twisting can tear 'em on the way out.

BustedS13 · 07-19-2009, 11:38 AM

Quote:

Originally Posted by GSXRJJordan

Lol, cool, but shouldn't be turned either. If you pull them straight out with a flathead, you can usually re-use the O-rings. Twisting can tear 'em on the way out.

eh, fair enough, but i'd rather just pay the dollar to replace them anyway >.<

07-16-2009, 11:03 PM	#1
musicmaniac Join Date: Feb 2004 Location: virginia Posts: 23 Trader Rating: (2) Feedback Score: 2 reviews	Fuel injector question Long story short i have two fuel rails both with 4 270cc dohc ka injectors. My problem is that one rail has cream color plastic nipples at the ends and one of them is broken like someone dropped the injector and the nipple cracked. The second rail is similiar except instead of complete circles all four of the injectors have just a circle with 4 little pegs that dont really seem to do anything. On the peg rail i have one of those little pegs broken off. So what is the point of these little nipples on the end of the injectors. I am assuming they are for sealing to the intake manifold. Would it be alright if i just mix and match the rail and have four unbroken nipples or what should i do. I can provide pics if necessary. Edit: Here is a really good picture of what i mean. Top being the four peg and the bottom being the complete circle nipple.

07-17-2009, 09:56 AM	#3
burnsauto Post Whore! Join Date: Dec 2006 Location: 717, PA Age: 39 Posts: 3,324 Trader Rating: (6) Rides Gallery: burnsauto Feedback Score: 6 reviews	they are supposed to help with atomization, but they will run just fine if the tabs are broken. You CAN mix and match, just as long as you know they are the same flow rate. You may want to send them to RC Injectors and send them out to have them bench flow tested, make sure they're not clogged, dirty, and don't need replacement. Fuel Injector Cleaning __________________

07-17-2009, 10:05 AM	#4
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	We've discussed this numerous times before. 'Pintle caps' are what you're referring to. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

07-17-2009, 10:09 AM	#5
BustedS13 Post Whore! Join Date: Jan 2004 Location: Phoenix AZ Age: 40 Posts: 10,287 Trader Rating: (0) Feedback Score: 0 reviews	i pulled a dead injector a few days ago. it probably looks similar to yours: as far as i know the ones with one solid piece and the ones with the four pointy things are both 270cc and do the same job... but i've never seen a broken one with the one solid pintle cap. i'm going to get a set of four of them together and send them off for cleaning, i recommend you do the same protip: the junkyard won't find a bag of injectors hidden in your underwear __________________

07-17-2009, 10:20 AM	#6
landins13 Zilvia Addict Join Date: Jan 2008 Location: Baltimore Posts: 986 Trader Rating: (3) Feedback Score: 3 reviews	the yellow one looks like a hks 550 injector __________________ NO HANDS IN PANTS!!

07-17-2009, 09:49 AM	#2
musicmaniac Join Date: Feb 2004 Location: virginia Posts: 23 Trader Rating: (2) Feedback Score: 2 reviews	anyone have any ideas

07-18-2009, 07:10 PM	#11
bl3ujay07 Zilvia Addict Join Date: Feb 2008 Location: norcal(209) and socal(805) Posts: 691 Trader Rating: (6) Feedback Score: 6 reviews	^^^Wow, wtf with him. ProjectRDM always helping the forums. Take your pissy ass i-know-everything out and go back to nico. We dont need smart asses like you in this forum.