1G (90) no spark /light spark

[1gproblem child]

Ok hopefully some one has had this issue
This just happend a week ago I have been trying to figure it out I have no spark on idle in cylinder 4 or 1 when I give it throttle I get spark back but very light , if I take one plug at a time out and test ever plug has good spark if I take all four out and test at the same time I have no spark on 4or 1and 3 has a crazy ark and 2 is normal also tach is haywire didn't really work before either but since the problem has come up it's worse jumping/ glitches on idle
Things I've tried with no luck
C.a.s,the box on the intake manifold for spark,I've swapped out coils and wires. Brand new plugs

 

[19Eclipse90]

How's your ECU look?

Check all of your connections and ensure all grounds are good.

 

[1gproblem child]

Ecu is fine , I fixed it but it doesn't make sense still I swapped from speed density to 2g maf and I have spark back everything is normal again any answer on why that is would be a huge help