I see alot about the cylinder 3 misfire but everyone's problems appear to relate to hear soak.

I just bought this Monday btw

It doesn't matter when I turn the car on it has a rough idle. It ruins great when I'm driving and feels like it has full power. I didn't have a cel but I scanned it and had cylinder 3 misfire code.

I put on a new coil new plugs and it looks like the person before me put a new injector in cylinder 3 so I put a spark plug heat shield on it to be safe. I also cleaned the idle air control. No fix

Anyone have any other ideas. I'm going to check compression and fuel pressure on Sunday. But any other ideas till then would be great

Edit: no oil loss no coolant loss and nothing appears to be mixing

It's a 2000 Cherokee btw

 

Ford Pinto? Gremlin? What are we dealing with here? You say "car".. I'm confused now.

 

Haha truck sorry just always had cars it's a habit. It's a 2000 Cherokee

 

I thought I put it in the title oops

 

These codes just came up P0203 & 0305

 

i'm having this same exact problem but my code is saying cylinder one misfire.
replace coil pack, spark plugs, and injector 1. still got the CEL

 

Turns out the guy I bought it from unplugged the check engine, I ended up having a cracked head and some of my injectors were literally melted so swapped everything last weekend and a new head from clearwater heads.

Check your intake manifold it took me a hour to get all the gook out of it so dirty