Hi peeps,
I'm a new owner of a 2003 Acura TL S series. Super thrilled and already named her Raven. She's hot, sexy, and mysterious! And as for the mystery, she already has me stunned. I bought her from a buddy whom is a Honda fan and he sold me her cause she would be dependable with a little TLC. So far we've changed the fuel lines and tank(it rusted out and leaked at the seam). We had the tank out, so hey why not the lines, right. Well before all this change when I would start her, she would Idle high(1000 rpm) and when warmed up she would pulse. 900-1500, 1500-900, up and down up and down. We changed the ICV, re tightened the by pass valve( loosened when we removed the tank). I looked over the vacuum lines but saw no obvious wear or cracking. I'm getting flustered. Anyone got any ideas as to what may be causing the pulsing?

Also I forgot, the friend In bought this from swapped out the original transmission with one from a 2006-2007 Accord. Don't know if this may change anything.