I think 3 of my injectors are going bad so Im going to switch them around and make sure. Im having some trouble getting the two screws out that hold the injector. I sprayed some liquid wrench and hammered the screw to see if it helps loosen up. I dont want to strip it them so anyone have some tips? Since I might have to replace 3 I might just replace them all for better performance injectors, I might get some nitrous or maybe a supercharger in the future. Which ones should I go with, or are the oem ones good enough to run nitrous or a supercharger? Thanks.

 

why do you thing your fuel injector is bad?

 

I have had a Multiple Cylinder Misfire problem for a while and I have checked the Crankshaft sensors and camshaft sensor. I checked the ignition coils by pulling one out at a time and checked the spark on the plug while the car was running. I unpluged each coil pack at a time to see if I can figure out which cylinders might be misfiring. Unplugging cylinder 3, 5, 4 made no difference, the car misfired the same. Unplugging the others made the car run worse, it had a very low idle and sounded like it was going to stall. I swapped the coil packs and plugs around and it made no difference. Unplugging cylinders 3, 5, 4 still caused the car to misfire the same as before. I think they might just be clogged because I checked the resistance on injector 4 and it was fine. A few days before my problem started, I used Redline Injector cleaner and I think it might have caused the problem. I got the screws loose but Ill switch them in the morning. If the injectors are clogged, how do I clean them? If they are bad, should I just get oem or better ones like 300z injectors. I plan to get nitrous or a supercharger sometime in the future so I can just save some money and replace all for better ones now. What should I do?

 

I tried pulling the injectors out but Im having some trouble. I removed the two screws and the metal cap, and I can pull the injector out, I can turn it but its just not coming up, do I need to do something else to get it out? Thanks.

 

You need to get a pliers and clamp the square part of the injector with the pliers. While clamping start pulling and twisting up and the injector will come up. The Injectors need a good amount of force to remove, so be cautious to not fall backwards and drop them.

-Nick

 

Thanks Nick. I switched the injectors and tried to uplug the coil packs one at a time to see if the problem changed to the other cylinder but now it doesnt make a difference unplugging either one. I wasnt getting any engine code and the engine seemed like it was sounding normal but the exhaust was till making a putting sound. I took a drive around the block and it was running fine, no CEL but a few minutes later the engine started to sound like it was misfiring and I got the Multiple Cylinder Misfire code again. My exhaust is still making a putting noise and there is water dripping out, more than there should be. I dont know wtf is happening.