01 obw p0446

OK i have a 2001 OBW 5 speed that has two CEL codes:

p0446 evap control malfunction (something like this)

o2 heater circuit malfunction

Replaced the purge solenoid ( on manifold ) and replaced vacuum lines to it.

CEL still comes on after 6 sec of running and the 02 CEL light come on after two starts.

What do i need to check?

car has symtoms:

pulsing idle when you come to a stop.....self corrects after a second or two. touch throttle and pulse comes back.

I also replaced the entire throttle body with sensors. ( i had a spare off a 2001 leg GT 5 speed)

also when I give it the gas on the highway I hear a high pitched "sucking noise" from pass rear

I inspected the vacuum lines by the tank and the charcoal canister and found no broken or split lines.

I bought the car after they had run over a retaining wall to avoid an accident. The front drivers control arm was bent and the rear trailing arm was also bent and the exhaust was all twisted.... something might have hit something and ripped / broken something underneath????