Blink

back ground



motor - rebuilt 1k miles ago, new oil control rings, and o rings.

turbo - BNR stage 3 & a stock s5

EMS - Microtech lt8



so.. It smokes.. it smokes at idle, it smokes when warming, it smokes when compression braking. Once it's done with that smoking part though it doesn't. Under light load.. it doesn't under normal driving around it doesn't. When you idle, compression brake, or just warming up it smokes.



I thought it was the motor. What else could it be it has all the symptoms of a failing control rings. Well they were in 100% good condition. great.



Thought it was the turbo so i purchased a used jspec and swapped out my BNR.. No luck still smokes



I'm running open atmosphere crank case vents.. is this not enough?



Oil consumption.. yes.. consumes like non noticable amounts when its not allowed to smoke. When it smokes to all hell.. i've noticed a little bit more.



The smoke it self doesn't seem like oil or smell like oil. More like fuel but it's not black smoke .. yet it's not blue.. nor white. . brown?



I'm getting close to give up. I can't take it anymore.. I've tried to do everything right in the attempt of not having problem, yet that's it. I'm still having problems. I had new Greddy 720cc injectors all around 4 - 5k miles ago.. maybe i should have had them tested? i'm running bare block to is the walbro..



i've been reading posts, racking my brain at what the could be's.. is it my fuel map.. is it crap causing this... is the motor still ****... is this new turbo ****.. am i for some reason still having high crankcase pressure and that's causing it.. anyone want to give me this great super simple answer and solve all my issues.. that'd be great



kthanks night.

-eric

1Revvin7

keep in mind, turbo was oily, motor exhaust manifold was not: had motor checked = good condition.



Swapped turbos, still smokes, has not check the turbo......!

pengaru

Are you premixing?



Did you reuse the old thermopellet when you rebuilt the motor or did you instlal the thermopellet plug that eliminates it?



Did you reuse the old side/intermediate housings? If so, what shape were they in?

Blink

motor was rebuilt by rotary resurrection (twice) and before that marvelspeed. But all were in spec the last two disassembles. I bought the motor outright from Kevin in Jan, Didn't actually start the car till say March.. drove it some.. then it went down again in June to have the motor looked at again due to the smoking issue.



I stopped premixing for 2 tanks to see if i was running to strong of a mix and that didn't seem to affect anything.



as far as i know it's the stock thermopelette.. I had the shim but it just wasn't installed yet as I need an impact to do it.



the Plugs make it look like one rotor is running richer than the other i.e. more carbon build on that plug.



side note... i'm starting to remove the manifolds and turbo for visual inspection AGAIN... i just didn't feel like getting under the car so the turbo is still on

pengaru

if the side/intermediate housings were reused, it can take a while for the oil control rings to 'wear in', during this period there will be smoke. There is also the thermo-pellet issue, what is the oil pressure like? If the thermo-pellet fails, it can cause failure of the O rings in the oil control rings, which can cause smoking, but this will also cause bearing damage, and likely temp problems since it cuts half the oiling to the eccentric shaft and rotors (front bearings/rotor suffer). The plug is a good idea to use just as a reliability mod... But if the thermo-pellet is fine it's a moot-point.



Brown smoke is odd, oil doesnt generally do this, it's usually a result of running rich when it's black/brown. Engine sump oil is typically blue, you do have programmable engine managemen so whats the a/f ratio like?

Terrh

just a total shot in the dark, but is it possible that your OMP is sticking open?

1Revvin7

He's running premix, and plus He has not tuned his car....

Blink

OMP what's that? premix



dependant on rpms i'm between 30 - 80+



This also doesn't seem like a directly proportional item either.. as oil pressure rises the smoke doesn't increase but stays basically the same.



Visually checked the car doesn't smoke once warmed up and just driving around. So i'm just getting smoke during certain times and events that are taking place



unfortunately i'm waiting to order my wideband.. hopefully this coming week if i don't spend to much money while i'm gone.

pengaru

If you have not tuned the microtech then thats likely your problem, it's probably running rich under these circumstances. Keep in mind when running premix running rich will generate more smoke than when running just as rich with no premix. With my E6K when I was tuning the throttle pumps the car would smoke for a minute after cracking the throttle when they were too rich, the excessive premix oil stayed in the chambers and took a while to burn away (this is how premix works, I just had too much so it was smoking). But black/brown, probably lots of fuel.



how does it run when it's smoking like this?

Blink

i've leaned out the idle mix to the point where it starts to hunt for it's idle and that doesn't seem to affect the smoke either.



I'm down to having to order the wideband and pray thats its. I think i've covered almost every other possibility.



it idles fine.. drives fine.. i dont' get on it when it's still warming up for obvious reasons.. ah.. more fun



thanks for the replies btw.