1999 24valve auto. Had a set of jammer stage 5 injectors put in. Idle is very rough. Truck ran smooth before. Mods.boost elbow.   Fass 185. 1/2 inch fuel line to vp. S& b air box, AFE intake, have a comp box and smarty. Turned them off still rough idle. Thanks for any input. 

Edited January 24, 20196 yr by JAG1

Are you sure all your cross over tunes are seated well and you dont have any air leaks?  

 

If you are then I would say the injectors are bad.

I have not done injectors on a 24 valve yet, but there is a proper sequence to installing them. Something about tightening the high pressure lines in first before you tighten each injector so that they get a chance to properly line up and properly seat with each fuel line. If you did not do it the correct way you need to redo it. We had another member with the same issue a few weeks back.

 

Hopefully someone else will chime in with a little more assurance about this.

@JAG1

 

Is right. The high pressure line is snugged up first then the injector hold down. If you reverse that then the injector hold down is tighten first then the injector can't center itself and typically creates a leak inside the head in the return rail and it just runs out the return line at the rear of the head.

Just found this video. Good information on fuel spray.