Hi i just became part of this forum today. well anyway i installed my new injectors i have a set of rc 440 cc injectors my car already has a 255 fuel pump aem fuel rail, aem FPR, skunk 2 intake manifold, skunk 2 pro stage 2 cams, dual valve springs, retainers, valves, 3 angle valve job, header, exhaust, motor is a b16 a1 block with a b18c1 head. when i first start the car it idles at 3500 then drops to 2500 when warm and likes to go between 2500 and 4000 rpms not really in any patern just kinda stays at a high rpm all the time, before i installed the injectors the car would first at cold idle at 2000 then go to 1500 when warm but i always had to give it a little when it was cold or it would die or idle a 300-400 but would sound like a stock car at those low rpms. im really confused my friend said i may have installed the injectors bad but i took em off and but them back on. so any help would be greatly appreciated. sorry for it being long i just want to describe everything.

 

tune maybe?

 

i dont think running rich will make the car idle at 3000 or 4000 rpms to much fuel pressure maybe its at 59 psi. when i drive it i dont need to press the gas to take off from a stop just let go of the gas and the car goes rpms drop to 1700 and the car accelerates on its own i checked the throttle cable its not that. im thinking i didnt install the injectors good again. and its sucking in some air

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by robmobster2010 &raquo;</TD></TR><TR><TD CLASS="quote">its sucking in some air</TD></TR></TABLE>

... as in vacuum leak?

 

i thinkits a vacume leak so today i installed the injector with a fatter 0 ring and the car just dies and wont even stay on

 

You need to tune for 440 injectors if you haven't done so already. You can't go from 240's to 440's and expect the car to run without changing the fuel maps.