So most of you have seen the pics of my perty engine bay in another thread... well since i finished the build i have driven the car only a few times - from the shop back home (about 15 miles) and around town a few times (maybe 20 miles total). the car has been running super rich since i have upgraded the injectors and i'm awating a break-in tune so i haven't drivin the car very much.

here's my problem - once the car is up to normal operating temp it blows a smoke screen of blue (oil obviously) but only when i let off the gas and the RPMs drop to about 2500. the lower the RPMs drop the worse it gets. once i get back on the gas it stops

i let the engine cool down completely and tried it again to verify the symptoms and had the same outcome...

is there any cause to this other than bad control rings??? i have disabled my PCV so the breather on the oil pedistal is vented to open air, and i doubt that would be the cause and the oil is not overfilled

i'd hate to have to pull the motor back out again!

 

damn doesn't anyone have any insight at all?

 

now i'm really puzzled.... just for yucks i rehooked up my PCV valve and now i'm not burning any oil... this is fine with me - i will leave my PCV hooked up for good now if i have to, but what caused this?

 

what injectors and fuel management do you have?

 

1000/1680s PFC

 

so you blocked off your crankcase ventilation? you should be running a catch can if you do not have a PCV. otherwise you will blow a crapload of oil if you don't have proper ventilation... happens on any turbo car (rotary or otherwise)

 

no i didn't block it off, i just left it open. i was going to use a catch can but hadn't found a place to mount it yet so i just vented the filler neck to open air. then i reinstalled the PCV valve between the neck and manifold and the problem was solved. thats why i'm confused

 

Normal problem. I actually was guilty of putting the pcv in backwards and had the exact same situation (smoke on decel). You need to run a catch can. Simply take two lines from both nipples off the oil filler neck and connect them to a catch can.

 

good to know... where is a good spot to mount it? i have the greddy can