slight miss

[Jaswir]

Any ideas on what would cause a slight miss?

Timing is at 10*
changed Spark plugs
Cap + Rotor
wires are new
new fuel filter






its a 86 mustang GT stock engine

i think my 02 senors dont work! they look old and orginal... could that cause a miss?


also it is SD no maf

 

[88mustang92]

check elec plugs on fuel injectors?

 

[Jaswir]

seems to miss only when starting out... up to 3,000rpms! then goes away... like it chugs then goes full speed!

 

[HISSIN50]

Pull codes and run a cylinder balance test.