Engine Problems!!! Need Help!!!

[eweppler]

I have a 92 talon tsi awd that has a rebuilt engine with aout 2,000 miles on it.

Here are the problems i am having. It all started out as a big boost leak and the acceleration had some hesitation and then the radiator was leaking and i didnt notice in time and overheated the car so i replaced the radiator. I got a new intake hose and then the boost leak went away and it worked well for a while. Then a couple of days later the engine started stalling when i came to a complete stop and right away at start up the the rpms would go up to anywhere between 2500 and 3000 rpms and it would stay there for a little while and then the rpms would drop to normal around 750 rpms. Two days ago i was driving to work when i noticed that the boost gauge was stuck at 14 psi for a while and the exhaust was shooting out black smoke at times. Then i got home from work on my break and let the car run for four min before turning it off and then 10 min before i had to leave i started it to let the rpms even out and i went outside to leave and i noticed white smoke rolling from the engine so i ran to the car and shut it off and it sounded like the antifreeze was boiling or else the engine was trying to get more antifreeze. This kinda makes me wonder if it was because i didnt make sure to get out all the air bubles after i replaced the engine coolant sensor. The hole time threw all my problems there has been an engine surge on start up that i thought maybe this was just due to the engine being cold. Also the turbo has been wineing.

I have replaced the radiator, thermostat, radiator cap, intake hose, radiator hoses, fuel pump, and the engine coolant sensor.

Could these problems be the result of having a bad turbo or is there more to my problems? I thought about taking the talon to the mitsubishi dealer just to have them test it and see what the problem is. Is this the way to go?

[twack]

boost leaks dont cure themselves, im guessing there is a massive leak somewhere and youv been working the hell out of the turbo. never take it to the dealer

[Goat Blower]

White smoke means water is getting into the combustion chamber, either from a bad headgasket or turbo seals. You can unhook your IC piping after the turbo and you'll have your answer which one it is.

[JET]

If you pull the IC piping like goat blower says, then yank the plug on the MAF too and you may get it to run. Who rebuilt the engine?

[iceminion]

I would highly suggest getting your car looked at by one of the more senior members of the forums. (if you bring it to mitsu, you will probably be overcharged)

you might need a headgasket (good excuse to upgrade headstuds and cams)

you definately need to to a boost leak test, that would explain the 14PSI being displayed on your factory gauge

The factory gauge is more of a fuel indicator, as in, how much fuel is being put into your engine. if you have a leak after the turbo, the MAS will detect huge amounts of air(and compensate by adding more fuel), almost none of it actually going to your cylinders.

[eweppler]

Originally Posted by Goat Blower

White smoke means water is getting into the combustion chamber, either from a bad headgasket or turbo seals. You can unhook your IC piping after the turbo and you'll have your answer which one it is.

What will be the outcome of doing this or what will tell me which one it is?

[Kevin 1G Drummer]

If there is coolant in your intercoler piping, that means your turbo seals are junk. If the IC pipes are dry, your head gasket is most likely junk.

[eweppler]

I did a compression test today and the dry test results were 130, 120, 120, and 130. The wet test results were 155, 140, 150, and 150.

[brando]

hg is good then probably. the idle surge is probablydue to a bad idle control sensor or throttle position sensor. i would sugest hard intake pipe's. you will notice an increase in performance and you will get rid of those crappy rubber pieces that can leak.

[eweppler]

Do you happen to know where i can get a good deal on hard intake pipes?

[b00stcreep21]

Boost leak, and leaky head gasket. Have fun

[Pushit2.0]

How could coolant get into the intake track from a turbo?

[eweppler]

Did a little more digging today and realized that my engine may have possibly been overheating because one of my vacumm hoses was stuck in the fan and also the lower intercooler hose was loose. I'm going to clean out my intercooler tonight and then check for shaft play on the turbo and put everything back together and see if shes running better.

[eweppler]

Cleaned out the intercooler and checked the turbo for shaft play. There was no shaft play at all havent had time to put everything back together to see if this changes anything with the engine.

[Goat Blower]

It's probably the headgasket then. Does your coolant overflow bottle boil when the car is running?

[eweppler]

Ok got everything put back together and im still having the engine stall. while the enging was smokine from the oil on the wet test i noticed that there was an exhaust leak where the turbo bolts up the the exhaust manifold. Could this cause a boost leak causing my problems?

[iceminion]

An exhaust leak before the turbo causes the turbo to spool slower.

I read the whole thread again, but nowhere did I see: I pressurized my intake system and it held xxLBS of boost for xxxAmount of time.

You need to do this.

I would not recommend upgrading your stock intercooling setup quite yet, stock is actually pretty good, run e85 and you probably can get away with not upgrading it.

build a tester, pressurize the system, the mitusbishi MAS system actually works quite well, and 1G's in general run great with no CEL's the only sensor that goes wrong is the temp sensor, but that causes startup issues, not stalling issues.

I would also run some tests to see if your IAC system is working properly, a properly working IAC system makes your car very very nice.

[eweppler]

Run e85? Wouldn't that be bad for your turbo?

[b00stcreep21]

Based on your previous statments, bring your car to someone that's more competant with dsm's...

[311evo]

Originally Posted by b00stcreep21

Based on your previous statments, bring your car to someone that's more competant with dsm's...

definitly, at least to get started.