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Ok well it set the upstream codes ?

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

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

It was a set from rock auto.

I put the ngk Cooper plugs in and it still sounds and feels like a miss. But no mil light.

I've try almost everything trying to figure this out. I've even try different grade of gas

I will order those tonight

I've swap coil to cylinder across from. It

Do you think I need to swap in a set of ngk cooper's?

It was stock replacement.

I even try a Delco plugs also

Factory spark plugs

Good afternoon, I'm in the need of some help. I got a 02 liberty with 3.7 that has a skip when it feels like it. On cylinder 2. Once it starts to skip you cycle the key and start it up ans skip it gone. I have replace the pistons and rings. 150 psi on all cylinders Replace heads Coil packs...