340 Engine Shake

plumkrazee70 said

Ok, I can double check the 02 I went out there this morning and koeo and it just stayed at 14.7. I didn't stay out very long though. To be clear the RPM does move around, just not a dramatic drop. Ill do another quick video of the dashboard sensors tonight.

I only have a pcv hooked up, the other two ports are plugged, one big and one small.

Click to expand...

OK, that sounds more normal - moving around a bit, but not much.
A video of the dashboard sensors would probably help a bit.

When you set the idle and IAC steps - did you adjust both screws (for primary AND secondary), or just the primary ones? Updated instructions from Fitech suggest using both. First back them both off completely, then screw each in to just barely touching, then adjust equal from there. I've found this definitely helps with very light throttle cruise and for idle.