Air tube and turbo piping

[Vovan]

i was going to clean AFM when i noticed that my air tube (the one that goes to my turbo) is full of dust, mud and probably oil - all this is mixed in there.... then i took off all pipes that goes in and out of intercooler - they all had oil in them... is it normal? i guess it's not. my AIR filter looks ok... air tubes is without cracks, i don't understand how all that mud got in there...

is there a way to clean all the pipes? i guess all this mud gets into the engine too

also, when i remove AIR filter when the car is running (idle) the engine's revs start to jump and engine works unstable...

i guess dirty pipes are the reason of this?

[BOOSTD]

The oil inside the pipes is perfectly normal, it's part of the emission control. Your unstable idle can be from dirty oil, wrongly adjusted TPS or ACC valve. Very common to get rpm "hunting" at idle on a 33 that needs a service.

[Vovan]

the car idles fine with air filter, but once i remove it - revs start jumping. but engine never stalls. maybe it's becuase more air is coming in and ECU do not control fuel when idling?? but i think that air flow increase is very very little without air filter.

confused again did you notice anything similar to this on your car, Boostd?

btw, what is TPS?

[BOOSTD]

The ECU does control fuel at idle(closed loop) removing your Air filter will stuff up your vaccum levels and the wierd idle is you ECU trying to control whats going on. I find my car idles wierd when its due for an oil change. When to oil gets to thin... ie less than 5w. The manual recommends 7.5w 30 oil. I have tried 0w 40 and my car hates the thin oil at idle and starts hunting.

TPS= Throttle Position Sensor

[Vovan]

i've found out that different oils with same specs act differently.

i used Shell 5w40 (the worst oil - doesn't keep with load), Castrol 10w60 - quite good and it looks like my turbine likes it and Hassol 5w40 - same quality as Castrol, but MUCH cheaper (use it now)....

though i want to try Motul oil, once it will be delivered here. heard it's good

[red900ss]

hmmm interesting, I use MOBIL 1 0W40. The car loves it, no smoke, doesn't use any up/lose any, smooth idle.

[Vovan]

Mobil here (in Russia) is of a VERY bad quality... maybe it's russian mafia who spoils good oil and selling fake instead of original

anyway, 0w40 is too liquid for turbo cars (imho), as the temperatures are much higher in tubro cars and this oil can just dissappear in some parts of the engine and all the pulleys (or gears - forgot the right word) will work without oil film... that happened to my engine with Shell 5w40 - my turbine started to switch off under heavy boost...