88 bronco ll rough starting

[88broncoll]

okay well i just bought this 88 bronco ll eddie bauer and the 2nd day i had it it wasnt starting but would turn over so i took it to the shop to have them check it out they told me the spark was horiible so i changed the cap/roder/wires/plugs/ battery/ oil/air filter/ and now it starts.. if warmed up it fires right up no problem but sittin outside over night or couple of hours i have to crank it ovr foever the first time tll it eventually starts or crank it twice. then when it does start it goes to die so i have to give it gas for 3 or 4 sec to warm it up.. could this be some kind of fuel problem or any sug please?

one more thing is when i put it in park, sometimes it will idle really high and then drop down and go back up and then drop and so on?

 

[SunSpot]

check all your vacuum lines make sure there are no vacuum leaks.......

 

[67 Bronko]

If your check engine light is on, sounds like the Map sensor, but I would go to Autozone or Advance auto parts and have them run a diagnostic check. They usually do this for free,

 

[B.B.BroncoII]

sounds like your vacuum lines to me I had the same problem a few years back