finnn

The car is a 1989 Turbo II, It runs great, especially good when its warm, however, once its warm if I turn off the engine and then crank it over again it fires in the same few cranks as it does cold, but it will smoke like no other. It doesn't smoke at all at idle when its warm or cold and will only smoke if its warm and cranked over. Very confused on why this is happening, can't tell if its white steam or blue smoke because it seems like it has been both colors the few times I've recreated this hot start smoke.

diabolical1

iTrader: (3)

welcome to the board.

does it have a smell to it?

do you use premix?

finnn

Yes it's stinky, like fuel and oil smell?
Coolant is fresh 50/50 and not losing any while driving.
I'm using premix at 0.5oz per gallon and have fuel injector cleaner in the tank atm.

FührerTüner

iTrader: (5)

Oil control rings or leaky injector. Is the smoke black or blue?

finnn

The injectors are freshly serviced and tested not leaking.
The smoke isn't black, more blue/gray

FührerTüner

iTrader: (5)

Probably oil seeping past your oil control rings.

finnn

Normal driving and letting off has no smoke at all until it's restarted. Is there anyway to help seat the oil rings? Because they are working great before I restart.

j9fd3s

iTrader: (3)

i've seen it in two cases. the typical one is where the O ring has a split in it, and if it lands with the split down, oil leaks into the combustion chamber, if its not then its usually ok

the other one was the guy who ported the engine nicked the iron, and every start was a smoke show

i also had a GSL-SE with leaky injectors and that would smoke on hot starts, if it didn't flood

RXSpeed16

iTrader: (41)

Does it still have the solenoid rack / rat's nest? Specifically the Fuel pressure regulator system? Cats in good shape?

finnn

Has the rat nest, only upgraded 255 walbro fuel pump. There is no flooding symptoms, it starts just as fast as it does cold as when it's hot.

Could a sensor out of wack give the engine too much fuel? Because I believe like the idle is different when the engine is warmed up hot smokeless and when it's restarted hot and smokey. No cats right now.

FührerTüner

iTrader: (5)

Oil smoke is blue-ish gray. Could also be the shaft seals in your turbo CHRA.

finnn

What is the best way to test for engine oil seals and turbo oil seals. There is a little oil film in the intercooler?

finnn

Alright, diagnosed it as the turbo. Downpipe and exhaust side of the turbo coated in oil and brown dust on the turbine, but it is dry on the exhaust manifold.

Turbo smoke seems like a very inconsistent thing, so it should always be your first check before you take apart your engine!

FührerTüner

iTrader: (5)

Glad you figured it out. At least it was your turbo and not your engine.