Help!!!
 

So my 07 2.3 2wd ranger suddenly started shaking at low rpms and my transmission light keeps coming on flashing then going off. Can someone please give me some advice? I was thinking vacuum line till I saw the light...

Is the vibration at low RPMs only when in gear or does it vibrate in Park or Neutral?
This would be an engine misfiring regardless, so checking spark plugs and their wires would be first thing to do

Any time the OD light flashes there will be an OBD2 code set in computers memory, you will need to check the codes

I'm stupid it's a check engine light. Misfire on cylinder 1. Plugs and wires it is lol

Flashing CEL(check engine light) means misfire is occurring at that time so "back off the gas" or engine damage may occur

Alright so after new plugs and wires the problem persists like I've done nothing... Idk what to do now

You have new plugs and wires so that is not nothing?

And you were suppose to CHECK spark plugs and wires, not replace them.............YET

So what did #1 spark plug's tip look like compared to #2 or #4???
That was the point

Spark plug tips tell you whats going on inside a cylinder

The no 1 looked fine. Visibly worn but no worse than the others. I read some that there's some kind of plug on the vacuum lines somewhere that can blow out. But I have no idea where to look