Smokey smokey cause?

Started by L18M, September 02, 2014, 10:57:19 PM

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L18M

I think i know the answer to this but what else can cause excessive smokey exhaust.
Its not a sweet smoke from water leak but a dirty smelling one and theres oil in the downpipe. Fitted new turbo and dp was cleaned so definitely oil burn.

I originally thought was bearings gone in turbo so turbo was rebuilt. still had oil and smokey so thought bad turbo and bought new one (borg warner). and still have this problem.

Only other thing i can think of is its coming from the engine. So does this mean its the oil control ring?

engine 2 years old, only ran 500 mile run-in. been sat for a year as smoke happened last year but i didnt have time to do anything with it.

i\'m guessing this means another rebuild engine? :(

http://youtu.be/1MCf7r_oujM
2 doritos on a stick woohoo :rollin

clive

Hope this makes sense, is it smelly or fumey, if it\'s fumey it could be excesses fuel ?
All the best Clive

JayDee

Looks like fuel smoke, does it sting your eyes?
Did the smoke start after the car was hot, could be oil left in the exhaust if it was burning oil before?

L18M

Hard to describe it. Smelt smokey? Didn\'t sting the eyes from memory. Not really a strong smell of anything.

Fuel is about 38 (psi think the units was) when running.
I thought might be oil in exhaust but after giving the dp a clean it\'s still had oil after starting.

The smoke kicks in after about 10 second of starting the engine.

Past info. Car was running fine before after rebuild. Ran for about 500 miles under 3k rpm and no boost. One day I go for a drive and then it suddenly smokes like vid. After this happened, I took off the dp and that was covered in oil. Thought turbo blown, had turbo rebuilt, started her up and still same problem with lots of oil in turbo. Thought dead turbo and bought new turbo. Fitted and still same smokey.
2 doritos on a stick woohoo :rollin

L18M

If it is excessive fuel then how to resolve? New plugs? Turn down fuel pressure? Stronger coils?

Running OEM coils and magnecore leads which I bought from Clive :Thumbsup!
2 doritos on a stick woohoo :rollin

clive

Won\'t be a plug, coil, lead issue

Is this the modded car with an aftermarket ECU, if so has it been remapped after the engine and turbo change
All the best Clive

L18M

I was thinking maybe something to do with the map but was OK before.

Map wise, it was fully mapped on large ported engine with t04e. Then that engine have way after mapping. Then replaced engine with stock port rebuilt engine on same map and slightly larger turbo.

That ran fine for 500 miles which brings us to now.
2 doritos on a stick woohoo :rollin

JayDee

If it was fuel, i would think it would be running rough, what is your breather system like? Although I doubt it would cause that much pressure to make the car smoke without some boost pressure if it was blocked.
Has the oil level dropped?

L18M

Breather system, as in charcoal canister?
I\'ll have a check tomorrow and possibly empty it?

Oil is pretty much same. Was mid level before problem and about same now after its been running trying to burn off the excessive oil I thought was in exhaust.

It sounds fine running.
2 doritos on a stick woohoo :rollin

JayDee

Sorry I meant crankcase breather off the filler neck

L18M

The hose off the oil fillet neck is plugged into the centre iron.
Took the oil cap off and started car but still same smokey.
The mechanic where the car is at said it\'s a slight blue tint to the smoke. Definitely oil caused. Engine sounds healthy and smoke start few seconds after car turns over.
2 doritos on a stick woohoo :rollin

boosted

Just a shot in the dark.....are you premixing? Too much wrong type of premix oil?
92 FD rx7 Twins 13.5psi.  EX Track car
EAT SLEEP ROTOR REPEAT.

L18M

Thanks for the idea, no pre mix though. :)
2 doritos on a stick woohoo :rollin

JayDee

May be worth having a look at the plugs, to see if oil is burning in the engine

L18M

Ok will do thanks JayDee!
Anything else to check?
car is away at storage so wont be able to check unto sat but trying to get any more info to check all in one go.

Last week when i looked (after the car didnt start due to fuel pump wiring) the plugs looked ok and not covered in oil.
What signs should i look for in the plugs?

Plugs covered about 1500 from memory.

appreciate the help greatly!
2 doritos on a stick woohoo :rollin