I shimmed up my Airdog 100 to increased fuel pressure to 17psi and put a 150 draw straw in tank. Now I have a slite miss at idle. Can someone tell me what it might be. Injectors?

 

When you say shimmed, you didn't resrict it in any way to increase the pressure? Only thing I can think of.

 

17 psi will not hurt anything. Good guess by you- might be injector - is probably right but what you did did not cause that. I would bet debris is plugging your screen that is found in your factory connector tube. It did not stop flow completely, just messed up with the smoothness of the delivery. also sometimes on these 24v's when you up the flow it does make the idle rougher than what it used to be. It doesn't seem to hurt anything though. If you go to bigger connector tubes (like.093's) your idle is rougher.

 

What I did is pull the spring in the pump, found a washer that is just slighty larger in the center than line and grind outside till it fit where fitting screws back in. Raised the pressure from 12.25 to 16.50 to 17 psi