Engine skipping

[LibertyTC]

Knowing the exact brand & part # would be helpful. Was it a 2 nozzle or 4 nozzle?

 

[Ksat]

If you have a scanner with live data capability, check out all available pids and see if anything looks amiss. Fuel trims would be the first in the list I'd look at. When's the last time you changed the O2s?

 

[Firefighterf18]

STANDARD MOTOR PRODUCTS FJ479 Specifications
Color	Gray
Fuel Injector Type	MFI Injector
Fuel Type	Gas
New or Reman	New
Notes	Includes O-ring
System Type	Top Feed
Terminal Gender	Male
Terminal Quantity	2
Terminal Type	Blade

 

[Firefighterf18]

I haven't changed the o2 yet. Cause I kept getting misfire on cylinder 2

 

[Ksat]

Malfunctioning O2s can cause misfires, even in just one cylinder. If you don't know the last time the O2s were replaced, it might be a good time to do it. Replace with only NTK brand. If you're feeling especially cheap, disconnect the electrical plugs going to both upstream O2s, erase the codes and see if the misfire comes back.

 

[Firefighterf18]

Ok well it set the upstream codes ?

 

[Ksat]

Yes, but you're looking to see if the misfire goes away.