i have a 91 crx dx. i have a crane cam(idle-6800), dc sports header, custom cat-back to a 5zigen muffler, full msd ignition, aem adjustable cam gear(set at zero), sneaky pete nitrous system, and air intake. The problem is at idle it has a miss to it. Sometimes it does it sometimes it doesnt. I want to fix this before i do the mpfi swap. Any ideas?

 

the larger duartion/lift of the cam will make it lope a bit at idle... I would do a compression test just to make sure its ok. You also might not have a valve sealing good in your head.

Jeff