So, I need to replace 1 fuel injector, but I thought seems as though I have to replace 1 20year old fuel injector, I should probably replace all of them, so I dont have to do it again later on. Is there a site with instructions on how to pull the plenum, I can pull it. But putting it back together might get a little confusing with all the hoses. And is there a site or member that sells fuel injectors for a 93 na reasonably cheap? cheers:br:
How to remove replace the plenum is saturation covered in the tech section on this site. Injectors for your car should be reasonably numerous, try the wanted section. Installing injectors is straight forward, but when you haven't done it before it may seem more like a black art, and only to be attempted by the relevant pointy hatted magicians, its not. But remember fuel is flammable, so doing the job right the first time is very important. Plenty of how 2s on the net.
To change injectors Plenum off - Check tech section Remove Fuel Rail - 6x10mm (i think) Remove injectors from fuel rail - take off injector caps 2 x philips head screws, might have to use vice grips to break loose so you don't strip the heads and don't lose the brass half moons. Push injectors out of the rail - Couple of different ways - I used the socket and vice method Replace injectors and o-rings - Use lots and lots and lots of petroleum jelly to push them back into the rail. USE LOTS AND LOTS - Nothing worse than pinching an o-ring and having to re do it all over again. Or as I did put the car together and nearly hydrolocked the engine with fuel due to pinched o-ring. I would strongly advise pressure testing the fuel rail before putting back in the car so you know the injectors have seated correctly. I just hooked one side up to the fuel line and blocked the other side and turned the keys to the on position to pressurise the system. Leave for 10 minutes and if no pressure loss continue on... Put everything back, plenum on and away you go. :br: Any petroleum jelly that is left will get dissolved by the fuel so don't worry how much you use. Contact pennyarvs for reconditioned injectors. Beavis
Hey John Just to add: The most technical part is putting the injectors back in so they dont leak (that can be a hassle) As stated you need to lubricate them thoroughly, some use WD40 (beavis uses petroleum jelly) I just soak in motor oil before putting them in and have never had any trouble. The real trick here is when they are seated make sure that they are flush and sit right in the middle of the rail cavity. USE A MICROMETER TO CHECK ALL SIDES! If the injector sits more to one side even slightly, it is incorrectly seated and will pinch the oil rings and then LEAK! They must all be seated flush with the injector sitting in the middle of the rail - that is the trick / most important thing thing to doing it right (lots have failed to do this before and had big problems later) - then you can test with pressure Dont forget to see pennyarvs, he has a spare injector (because I just gave him one-haha) Pennyarvs flow tests them for you and thats what you need to have done to make sure they are functioning correctly Cheers Jamie
I don't think a micrometer is the tool of choice for this measuring excersize. Maybe a vernier could be the better option.
Well lubed o-rings of the correct size, nice clean injectors and rail and push them in hard. I've never had any leak, or bothered to measure anything. Always seemed pretty obvious to me if they were seated properly or not.
