Remember that if someone replaced the "lower block" because a cylinder was egg shaped, they already had to do a head gasket, because they reinstalled the head on the new block. How lond ago was that? Was the replacement block a new short block from Mitsubishi, or was it done by some non-dealer shop?

 

yes they did replace the head gasket when they put the lower block in. and this was last may...

Oil in the intercooler lines,
white smoke out exhaust but only when turbo spools,
To much play in the turbo
oil leak off the Turbo
Stuttered when the MBC was hooked up (correctly)
The MBC was doing beautiful and boosted right at nineteen lbs. then out of no where it started stuttering and cutting the fuel really bad...

anyideas?

 

We just got the problem child with down syndrome back last wednesday. The headgasket was fine, everything was fine. It was an overspun turbo. The reason for the white steam/smoke out the exhaust when you got on it, was because opening up the throttle body dumps gas into the engine,. Since the turbo was over spun then the engine wasnt getting the right amount of air. Thus the mass amounts of gas that was being dumped in wasnt being burnt. Exhaust valve opens up, that liquid gas goes into the hot as hell exhaust pipe and turns to steam... just like water.......

So it is running 18/19lbs like its supposed to now and running strong.... I havent personally popped the hood and looked at everything yet cuz i havent been home to do so. But ill get around to it, and see just how good Mitsubishi is at working on cars...

BTW, it was covered under warrenty...

 

did they replace the turbo? is that the explaination from mitsu?

 

That explanation makes no sense. The throttle body controls AIR, not fuel. Fuel is injected based on the amount of air that goes through the MAS. If your turbo was not working properly, it would not pull as much air through the MAS. The ECU would not dump more fuel than the measured air called for.

If you're running rich (too much gas) you don't get white smoke. Gas does not turn into steam in the exhaust, it burns... for example, some antilag systems inject gas into the manifold where it burns and spools the turbo.

There's some other explanation for your problem. Until you find what it was, I'd not be confident in the "fix".

 

what do you mean it makes no sense? the ecu is set to put a certain amount of air and gas into the engine, when the turbo busted it didnt get the air it thought it was getting cuz it was sucking it in but not getting it to the engine (IE: busted turbo) and gas doesnt burn when it goes into the exhaust, it steams like water........ ever spilled gas on the ground and watched it evaporate... when it evaporates fast it turns to steam...just like water...

think about it............
It didnt steam at an idle, only when it it was accelerated... you are trying to put more air and gas into the engine. but the turbo was busted so the air bypassed it by the turbo through the seals...so the MAS was telling the car it was getting all this air the turbo was sucking in, but the engine never got it... so it was close to pure gas going out the exhaust valves....

 

sure you know this already, but the classic busted turbo shows mountains of white smoke with blue for highlights.

as to your answer, just where do you think the air from the turbo was going? unless you had a broken hose ? even if the turbo wasn't spinning at all the air would still get through to the motor. since the turbo is not spinning it is also not sucking anything through the maf, so its a wash.

what happens when you have an overspun turbo and how do you get one of those? honest question, never heard of it.

 

Your kidding, right? If you're not, you need to start reading again from the beginning of the engine primer.

The ECU reads the mass of air being pulled through the mass air sensor. It then uses that data (plus compensations for other sensors, like engine temperature and barometric pressure) and looks up the amount of fuel to inject from the air/fuel maps built into the ECU by the factory. So, simply stated, if your turbo is shot and not pulling in air (or as much air), then the fuel is automatically reduced by the same proportions. It's a closed system; unless you have a huge boost leak the fuel amount injected is always controlled by the mass of air pulled through the MAS. You cannot have too much fuel unless your MAS or some other sensor is broken, or you did something like increase your fuel pressure or change injectors. Even then, your ECU will read "rich" and try to adjust your engine functions to reduce the "rich" condition. That's not what you're describing, though. Lots of blown headgaskets only show symptoms at higher cylinder pressures, not at idle. How did you mechanic determine that the head gasket was fine? Did he do a leakdown? Did he pressurize the coolant system? Blown turbos lose oil through the seals into the intakes, but don't usually lose air in any quantity sufficient to cause a rich condition.

I hope you never spill gas on a hot manifold, thinking it will "evaporate like water". It will burn your car to the ground.

 

wow.....

CO VR4 is posting some good information you need to try and digest instead of arguing/debating with him.

Before you can understand how an engine works, you'll need to understand some basic chemistry and physics, like they teach in high school.

 

Either im not typing it right, or you dont understand much... because i know what it was and thats the best way i can explain it... I got a phone call and he said he did the headgasket test( no clue what he did) and he said it was fine. He said it wasnt oil/coolant coming out the exhaust it was pure gas.... I know chemistry, physics and all that other **** you learn in school and college...
I understand what you are saying. I know how cars work, turbo/supercharger or not.

 

better take the car to somebody else right away!

 

after rereading your posts. it sounds like your turbo went out on the exhaust side.

I am worried about the explaination you got from the dealer(?) Although I think what they were saying was, the head gasket is fine, there was nothing but gas in the exhaust, ie no coolant.
The rest of the story is bogus. I am thinking the exhaust side of the turbo is mangled, destroyed the seal and oil from the turbo is entering the exhaust. It might be on the intake side too, or rather instead, because you said there was some oil in the intake. Unless it is a lot of oil, that oil may be from the breather. Oil that runs through the engine would be blue smoke rather than white.
hope it all gerts fixed for you.

 

not to **** in your wheaties, but gas doesn't "steam", water turns to steam, gas just vaporizes, it doesn't have a smoke point. When gas vaporizes at ambient conditions, you don't get a white plume of water vapor like steam exhibits, you get a wavy vision of vapor at best. The best way to pick up "raw" gas coming out of the tail pipe is by smell, not vision. So if he saw/you saw a cloud of vapor coming out the exhaust, it's either water/coolant or oil vapor, but not gas. And if the turbo ingested the air, but it didn't get to the engine, where'd it go???? Through the busted turbo and out the exhaust???? You do understand, that the exhaust pressure is ALWAYS higher than the intake pressure, right? You do get that concept don't you? And if it DID (retarded concept by the way) bypass the turbo and went directly into the exhaust manifold, it would mix with the purported unburned fuel and you would have just invented a new anti-lag system that you could patent and make $$$ millions off of. You should keep an open mind and listen to some of the feeback you get on this message board. You might learn something, and then you can understand why Mitsu mechanics don't have a very good reputation, and their word isn't gospel.