24OZ Posted January 14, 2007 Share Posted January 14, 2007 I just fitted my professionally cleaned injectors 280ZX Turbo 265cc (low impedence) to the fuel rail and noticed that one of the pins in the nozzle was further in then the rest of them. I thought nothing of it and then proceeded to fit it all onto the intake manifold. I then got talking to somone and wondered why it was like that, and I was told it may be defective, so I decided to test the injectors with a 9 volt source. I found 3 of them clicked loudly, 1 clicked very faintly and the other 2 didnt click at all. But I also don't understand why some of them are not clicking. My battery is fresh also, so it can't be that. Prior to installing them I did drop one of the injectors on the floor by accident, but luckily I still had the protective end cap on it, visual inspection seemed ok, but i didnt check the nozzle pin. Now I can understand if this one went bad, but what about the others? Appreciate any thoughts on this. Shall I test with a 12V battery? Is it ok to not use a dropping resistor? All thoughts appreciated. Quote Link to comment Share on other sites More sharing options...
24OZ Posted January 14, 2007 Author Share Posted January 14, 2007 Should have said, the engine is currently on an engine stand and wont be going into the car for another month or so. So I cant test with fuel, and I am also going MS. Quote Link to comment Share on other sites More sharing options...
HizAndHerz Posted January 14, 2007 Share Posted January 14, 2007 I just bought a set of NOS Crown rebuilt injectors and found that 2 of them had stuck pintles. I used a large paper clip to press the stuck pintles to free them up. I tested them on a little injector testing/cleaning rig I made from a bug sprayer and they tested fine. I've done the paperclip trick on other injectors and ended up bending the pintles because of how badly they were stuck. This caused spray pattern to become distorted. I can post a pic of my tester/cleaner setup if you want. Its pretty cheesy, but has allowed me to test/clean a bucket of salvaged injectors. I may write a post about my recent experiences with "rebuilt" injectors. Most of the "remanufactured" injectors were really just "reconditioned" (cleaned, painted, new external o-rings and hose clamps). Quote Link to comment Share on other sites More sharing options...
24OZ Posted January 14, 2007 Author Share Posted January 14, 2007 Yes please, I am sure others will be interested in your pics also. If the pindle is stuck will voltage usually unstick it? Quote Link to comment Share on other sites More sharing options...
HizAndHerz Posted January 14, 2007 Share Posted January 14, 2007 If the pindle is stuck will voltage usually unstick it? I've heard a couple of people say that zapping a stuck injector with 12V can sometimes cause it to unstick. I think that gently pressing the pintle is safer than zapping it with twice the voltage it was designed for, but that's just my opinion. Quote Link to comment Share on other sites More sharing options...
81280zx Posted January 14, 2007 Share Posted January 14, 2007 i would also like to see pics of the cleaning rig u made up and describe how u made it and what we would need cause i have had problems with "rebuilt" injectors before. thanks Quote Link to comment Share on other sites More sharing options...
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