4age issues

[BenAw11]

Hey guys just in the last week the mr2 started playing up thought it may have been the plugs gone so i purchased new ones fitted them today still have had no change still sounds like its running on three cylinders.
so i pulled off each lead one by one to see which one and the first cylinder isnt running yet is getting spark. any idea what i can check next see what the problem is? Would it just drop compression on one cylinder over night like that?

[BLK_20v]

Hey guys just in the last week the mr2 started playing up thought it may have been the plugs gone so i purchased new ones fitted them today still have had no change still sounds like its running on three cylinders.
so i pulled off each lead one by one to see which one and the first cylinder isnt running yet is getting spark. any idea what i can check next see what the problem is? Would it just drop compression on one cylinder over night like that?

I'd be checking the injector plugs to make sure they are still making good contact, failing that, swap the physical injectors around to see if the prob remains on the same cyclinder.

The colour of your plug should also give you a good indication of what it is like

[BenAw11]

just checked the injectors and yep you were right the 1st injector isnt working dropped it off for a rebuild but its circuit is failed apparently so they are ordering me a new one and rebuilding the other three.
Thanks heaps mate.