I had some rough idle problems, so i replaced the plugs, and that didnt help, so i hooked a timing light up. and i get signal to all the plugs. Is there a ground that could be bad. my map sensor is hooked up fine. Is there anything else I should check that maybe be wrong.

 

if you think it might be a ground, the easiest and quickest thing to do is just add a couple of ground wires rather than guessing. are you running a stock ecu?

 

this thread might help also.
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fixed-my-idle-problems-backfiring-bucking-more-170731/

 

Lots of things to check. Start by searching for and reading the thread in the Advanced Tech section. Then search for rough idle and read those threads too.

Could be so many different things. Too many to diagnose just by you telling us your idle is rough.

 

If everything is stock, then check out the idle motor behind your UIM. There is a wiring harness back there that has a bad habit of cracking on you

 

the mods i have are, dp, cb, manual boost controller, stock ecu, intake