Low rpm miss

[Wicked_306]

This is a new 306. The check engine light comes on after I drive it for a while. I got the codes checked and it was 19 and 14 I THINK I dont remember exactly. But I remember it was a fast idle or rough idle code. I have a tfs stage one cam in it. I have an automatic aod computer in it, but i converted to a 5spd. It misses like at 1500 rpms and feels like it just wants to fall on its face then after 2 grand it feels perfect. I have checked the plugs, wires, and the timmings set on 12 degrees. Could it be the automatic comp? What are some other things I could check about the low rpm miss? Thanks

Travis

 

[stangnutlx]

check spark on all 8 cyls, make sure your getting a good spark. Check fuel pressure. i think the computer could have something to do with it since they have different PCM's for manual and Auto transmissions..

 

[HISSIN50]

IIRC those numbers dont match up to the description you posted. I would run the codes again to make sure you are not chasing something that is not there.

Good luck.

 

[Wicked_306]

I dont remember what the number for the code was, but i remember it was a rough idle code, or something to do with idle. Maybe something to do with the timing but it is set on 12. It runs awesome above 2 grand just cant figure out what would make it miss at 1500 rpm and run awesome from 2 grand up.