Fuel Injectors - Part II
04-11-2006, 08:26 PM
#26
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
I snagged a set of those last time I was able to get out to Pick N Pull, but now I can only find one of the connectors 
So I went ahead and got some of the standard type on ebay (since I dont get out much these days 
).
So I went ahead and got some of the standard type on ebay (since I dont get out much these days ).
04-11-2006, 08:53 PM
#28
Registered User
Thread Starter
Join Date: Mar 2006
Location: Miami, FL
Posts: 420
I didn't pay that much for them though 
I got them much cheaper than that. Not as cheap as the ones at eBay though. I was trying to keep the same looking connectors though, and the others I found either had to be assembled or soldered and put together.
I got them much cheaper than that. Not as cheap as the ones at eBay though. I was trying to keep the same looking connectors though, and the others I found either had to be assembled or soldered and put together.
04-11-2006, 09:01 PM
#30
Originally Posted by nismo619
nismo pick what type of car did u get thouse off of ? please let me know as mine are getting to be old.....
04-11-2006, 09:03 PM
#31
Registered User
Thread Starter
Join Date: Mar 2006
Location: Miami, FL
Posts: 420
Heh, and to top it all off...ZX parts are really hard to find here in S. Florida. Most of the Pick N Pull stores here don't have any ZXs, so I end up having to purchase them off of auto parts or the web.
04-12-2006, 01:16 PM
#32
Registered User
Join Date: Mar 2006
Location: Snohomish, Washington
Posts: 10
Hi z people, in regards to this topic I see some ok info, some not so ok info, and some confusion as well. This is one of the many topics that I need to do a writeup for on our website, and it's going to happen eventually, it just takes time. I'm here to help as always, so I'll try my best to answer your questions.
When there is a leak at an injector, it is either from a leaky hose, or it is from the injector itself. The lower o-ring is only a seal between the inj and the intake manifold. If it is bad, it won't cause a wet external leak, except for on a turbo car in the boost mode. The upper o-ring is not a seal, it is merely used to fill the gap between the plastic and/or aluminum mounts. If the plastic mounts are cracked, it won't do any harm or cause anything to leak fuel. There is an internal seal in all L Jetronic injectors in the z's, and on all original factory injectors from 75-89 that seal was not impervious to alcohol. Alcohol and gas mixed are very common these days, thanks to the epa, and while it's a little better for emissions, it's terrible for any cars running ability. That alcohol eats the internal seals up, and causes the injectors to leak fuel externally which is of course very dangerous. If one injector is leaking, then the rest of the injectors usually aren't far behind it.
Once again, the 0-ring, (or injector seal kits) that you see on the market......WILL NOT STOP THEM FROM LEAKING FUEL. (sorry I yelled)
You cannot rebuild an injector without dismantling it completely. Frequently I've seen where people say they are rebuilding an injector, and they are actually refurbishing an injector. If you get someone to refurb your injectors and you have original injectors, you're still running the risk of having your injectors leak externally, so it's pretty much a waste of good money. Replacing the screens, hoses, and pintle caps, having them cleaned and flow tested is all good and fine, but you still haven't done anything about the internal seal. That seal cannot be replaced without dismantling the injector, and you can't dismantle the injector without destroying the plastic housing. The rebuilt injectors that we sell are completely dismantled, and the guts are thrown away. The metal casing with the needle and seat are the only part that is reused, all other parts are new. The new internal seal that is used is impervious to alcohol, so that problem is solved. Then all injectors are flow tested, and lubed before they are packaged up.
If a pintle cap is cracked it won't affect the spray pattern UNLESS the plastic is in the way of the spray pattern, then it will definently cause a problem.
Any other questions about injectors or injection system just let me know.
Z man of Washington
www.zspecialties.com
When there is a leak at an injector, it is either from a leaky hose, or it is from the injector itself. The lower o-ring is only a seal between the inj and the intake manifold. If it is bad, it won't cause a wet external leak, except for on a turbo car in the boost mode. The upper o-ring is not a seal, it is merely used to fill the gap between the plastic and/or aluminum mounts. If the plastic mounts are cracked, it won't do any harm or cause anything to leak fuel. There is an internal seal in all L Jetronic injectors in the z's, and on all original factory injectors from 75-89 that seal was not impervious to alcohol. Alcohol and gas mixed are very common these days, thanks to the epa, and while it's a little better for emissions, it's terrible for any cars running ability. That alcohol eats the internal seals up, and causes the injectors to leak fuel externally which is of course very dangerous. If one injector is leaking, then the rest of the injectors usually aren't far behind it.
Once again, the 0-ring, (or injector seal kits) that you see on the market......WILL NOT STOP THEM FROM LEAKING FUEL. (sorry I yelled)
You cannot rebuild an injector without dismantling it completely. Frequently I've seen where people say they are rebuilding an injector, and they are actually refurbishing an injector. If you get someone to refurb your injectors and you have original injectors, you're still running the risk of having your injectors leak externally, so it's pretty much a waste of good money. Replacing the screens, hoses, and pintle caps, having them cleaned and flow tested is all good and fine, but you still haven't done anything about the internal seal. That seal cannot be replaced without dismantling the injector, and you can't dismantle the injector without destroying the plastic housing. The rebuilt injectors that we sell are completely dismantled, and the guts are thrown away. The metal casing with the needle and seat are the only part that is reused, all other parts are new. The new internal seal that is used is impervious to alcohol, so that problem is solved. Then all injectors are flow tested, and lubed before they are packaged up.
If a pintle cap is cracked it won't affect the spray pattern UNLESS the plastic is in the way of the spray pattern, then it will definently cause a problem.
Any other questions about injectors or injection system just let me know.
Z man of Washington
www.zspecialties.com
04-12-2006, 02:24 PM
#33
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
Ok guys, my injectors are in. I just gotta get the fuel rail lined up. My damn Cold start valve's gasket fell into the car, so I've gotta look for that. I have bad luck when it comes to finding things after they fall in the car. My question first off is do I need that gasket, I imagine it probably is better to have it. Second of all if I can't manage to find it, where the hell can I get a new one? Autozone doesn't even have a listing for a cold start valve, and neither does another auto parts place around here. My next bet is Napa. I'm looking for some input from you guys.
04-12-2006, 02:40 PM
#34
Originally Posted by duowing
Autozone doesn't even have a listing for a cold start valve
Yeah they do... www.autozone.com Part# 800-2032
I think you have to be logged in for it to show up.
04-12-2006, 05:31 PM
#35
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
You can get some gasket maker and just use that. I dont bother trying to find those little hard to get gaskets. I just use liquid gasket maker and I've never had a problem with it. If you must, then just cut up some construction paper. That gasket is after all, just paper
04-12-2006, 06:25 PM
#36
Originally Posted by jfairladyz
If you must, then just cut up some construction paper. That gasket is after all, just paper
04-12-2006, 07:33 PM
#37
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
Purchased Gaskets: Timing cover, water pump, oil pump, manifolds gasket, head gasket, exhaust gaskets, and throttle body.
Other than that all the gaskets on my car are homemade. all other air and water gaskets are made from liquid gasket maker or paper.
Other than that all the gaskets on my car are homemade. all other air and water gaskets are made from liquid gasket maker or paper.
04-12-2006, 09:08 PM
#38
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
I located the gasket. It's now lodged between my a/c compressor pump and the bracket. I figure If I jack the car up and get under there I might be able to get to that gasket. If not, I'll just either get sealant or construction paper like j said. After what that other guy said about the injectors leaking externally, it makes me think I may just have to get some new injectors after all or buy some other known to be working injectors, but I still don't see how they would leak externally unless they were physically cracked all the way through.
04-19-2006, 08:29 PM
#41
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
I've ordered all new injectors too. So I'll be right alongside you in a few days when I get them. I was about to buy two new black plastic injector holders until I found out that would cost me about $17 for two little plastic holders. I said screw that. I'll keep it with 4 good ones and one broken one. I know for a fact that it won't cause a leak. It's just sort of a matter that they're broken and I'd like to replace them.
04-19-2006, 08:33 PM
#42
Originally Posted by duowing
I've ordered all new injectors too. So I'll be right alongside you in a few days when I get them. I was about to buy two new black plastic injector holders until I found out that would cost me about $17 for two little plastic holders. I said screw that. I'll keep it with 4 good ones and one broken one. I know for a fact that it won't cause a leak. It's just sort of a matter that they're broken and I'd like to replace them.
04-19-2006, 10:24 PM
#45
Registered User
Join Date: Sep 2005
Location: z junk yard
Posts: 1,271
Is It Possable To Make The Aluminum Ones ? I Will Be Heading Down To A Milling Shop Metal Shop Tomorow With One Of My Spare Fuel In Jector Holders And I Will See If They Can Mass Produce Them And I Will Sell Them To Every One !!!
04-27-2006, 06:15 PM
#49
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
Well I'm about to finish up my injectors once and for all. I've gotten so used to this that I went out there, had the rail and injectors out/off the rail and new injectors ready to go in all in the short time span of 45 minutes.
10-18-2007, 11:03 AM
#50
w0rld's l0ngest m0t0rswap
Join Date: Sep 2007
Location: Torrance, CA
Posts: 676
Originally Posted by zmanofwashingto
There is an internal seal in all L Jetronic injectors in the z's, and on all original factory injectors from 75-89 that seal was not impervious to alcohol. Alcohol and gas mixed are very common these days, thanks to the epa, and while it's a little better for emissions, it's terrible for any cars running ability. That alcohol eats the internal seals up, and causes the injectors to leak fuel externally which is of course very dangerous. If one injector is leaking, then the rest of the injectors usually aren't far behind it.
www.zspecialties.com
www.zspecialties.com
