1G Injector 4 doesn't work only at idle

[lasershark]

1g is running a little rough, come to find out injector 4 is not working at idle. above ~1500 rpms it runs smooth and normal. I have evo injectors and they have been fine since I have had them. So now the question, what would cause the injector to not work only on idle. I am going to throw the stock 450's back in tomorrow to see if there is a change. Open to suggestions on other issues or things to check

 

[pauleyman]

How do you know its not working? Misfire? Noid light?

 

[lasershark]

How do you know its not working? Misfire? Noid light?

Misfire only at idle, getting good spark, can audibly hear misfire in exhaust tone as well. Not sure what would cause an issue like this...

 

[pauleyman]

that doesn't mean injector isn't working. Just means you have a misfire. Injector could be clogged or leaking. See if it's actually firing or not.

 

[lasershark]

I've never heard of a noid light until you mentioned it so that is something I will have to pick up, thanks

 

[luv2rallye]

You should probably clean the injectors:
http://www.dsmtuners.com/threads/cold-weather-engine-issues.448803/#post-153136134

 

[lasershark]

You should probably clean the injectors

Helpful link, will give that a shot too. It's probably just a dirty injector but being that I'm not an electrical guru I also wanted to get feedback as well.
Appreciate the help

 

[pauleyman]

Just listen to it. Stick a long screwdriver on it and put it to your ear. Does it click?