Well yesterday all I did was removed the air filter and unplugged the MAF wiped the dust of the inside of the intake no I didn't touch the maf I also noticed some oil on the oxygen sensor on the passenger side so I sprayed some contact cleaner on it and plugged it back in went for a 10 min test drive really gave it some gas all was well!
Today got in and after 6miles I noticed my check engine light was on so i opened the hood and noticed the co2 sensor was a little wet with oil still on the prongs and I forgot to tighten the strap just behind the maf oops!
My codes are ....
p306
p308
p307
p0150
p300
I had him turn the cods off and they are still off after 8 miles, It had a full tank when I picked this disco up but I changed the Bat and reset my odometer in the middle of the tank so I think I have gone 140 miles sense my last fill up and I'm on a 1/4 tank! SUCKS
What should I do first??

 

Also let me add I have had no misfires and she idles very smoothly!

 

you do have misfires, just not bad yet. probably under a load. with the engine hot, and kind of dark, spray a mist of water over the plug wires, see if theyre bad. no real rhyme or reason to misfires on those 3 cyl, probably just a tune up

 

Ya I just picked up two front oxygen sensors and spark plugs tomorrow!
So if I spray water on the wire it will start to idle bad?

 

A tune up with good plugs and a set of Magnecor wires should cure your misfires.