mr_spider3

ok, i have a 94 5.0l. and ive been having this problem for a while now, and none of the shop around here can figure it out. well this one shop fixed everything possible i think for the emissions. alll the way downto the main computer chip.which cost a fortune. i got fed up with just dumping money into it. so i bought a book . it told me to run a test, and obd-1 test. well i watched it flash and came up with the code 312, this test condition is under running and it reads air misdirected during koer. koer= key on engine running test. so i remembered that i just had a new can on the passenger side installed, and they're vaccuum lines. so to make sure the test was right i unplugged them, ran it down the road and it didnt stall. so now i have to hook the correct lines in to the correct holes. i need a vaccuum gauge. dont know how to use one. does this sound right to anyone, has anyone had these problems. if anyone knows how to use the gauge please help.