I have a 98 Cobra and lately I have been having some erratic idle problems. Some days it would be fine, some days it would be all over the place. I tried every trick I know of...cleaned mass air meter, idle air control valve, adjusted throttle position sensor, etc... I then figured I would clean out my intake. (My car has 82000 miles on it.) I took off my upper intake cover and found some oil in there. Not just black residue - drops of oil. I have been noticing more oil consumption lately - I would change my oil and get only 3 to 4, sometimes 5 quarts out. (My engine takes 6 quarts.) I use nothing but Mobil 1 synthetic, so I wanna know where all this $4.50 per quart oil is going. 
I checked my PCV valve and when I shook it it did rattle, so I guess that is good, BUT it did have a lot of oil on AND in it. What is going on here? Is it serious? Does it have something to do with my idle problem?
OIL IN MY UPPER INTAKE
- Thread starter HeyLittleCobra
- Start date
COBRA90GT
Mustang Master
Yeah, change the PCV valve, it's a cheap part. Are you burning off any blue clouds of smoke when you hammer the throttle or let off at high RPM? 
You may also want to consider adding an oil catch can/filter inline with your PCV plumbing (IIRC, as part of the original design for emissions & whatnot, oil is whisked back into the intake).
Here is an example below (one can put together a hardware store version of this kit for far less), examples:
http://www.omslaw.net/tech/catchcanmod.htm
http://www.steeda.com/PR/Mustang/PR/555-3710.htm
G'luck!
You may also want to consider adding an oil catch can/filter inline with your PCV plumbing (IIRC, as part of the original design for emissions & whatnot, oil is whisked back into the intake).
Here is an example below (one can put together a hardware store version of this kit for far less), examples:
http://www.omslaw.net/tech/catchcanmod.htm
http://www.steeda.com/PR/Mustang/PR/555-3710.htm
G'luck!
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