Kool-aid kid
Junior Member
- Joined
- Feb 25, 2022
- Posts
- 10
- Reaction score
- 15
- Location
- Bloomfield, Iowa
- Ram Year
- 2020 Bighorn 1500
- Engine
- 5.7 hemi
2003 ram 2500 5.7. Just changed coils, plugs and wires. new air filter. Starts and idles good but can feel a little roughness in the idle. twice since the tune up it has missed roughly after starting. Giving it some gas did not smooth anything out. But if I shut it off and restarted it everything was then ok. These two times I mentioned probably were a week or 2 apart. I started it today and let it warm up and played with giving it gas while sitting there in park. 1st I attempted to hold the tach at around 1500 to 2000 rpm. It would hold that for a few seconds and then fall 4 or 5 hundred rpm then it would rise back up and fall again, back and forth. I experimented with more rpm and at 2500 rpm it would only loose a couple of hundred rpm. Again up and down. Above 2500 I didn't have any rpm fluctuations. Any Idea's would be appreciated. Going to try some injector cleaner and will try to get a gauge to check fuel rail pressure.