I have a 89 firebird 2.8 and its idling rough and its stalling when the ac is on sometimes.... smells like its running rich and the check engine light comes on and goes off... i checked the codes and it flashes code 32 and 34.... it has new plugs and wires and cleaned the throttle body and mass air flow... and it idles sometimes at 1100 and drops as low as 400 and stalls if the ac is on... my exhaust manifold is leaking on the passenger side really bad could the mis read in the o2 sensor be causing this or any ideas???? mas air flow map sensor egr what does it sound like a buddy of mine told me that the manifold could cause it but its not flashing a o2 code could that be the problem??? and i found out today it failed emissions by alot