i just hit 45000 miles...

 

Moreryce we're on the same page

 

My car was doing this at one time, misfiring like crazy, tons of black smoke when I even tried coming onto boost.. The problem with mine was a broke plug wire, changed it out and problem solved. I'd check the plug wires, plugs, and IC piping..

 

ok, ill check everything tonight, thanx

 

i checked the maf, boostleak test and i checked the plugs, the only thing i found was water in one of the plug holes but i dried it out but still no luck.... could it be an injector and for some reason its not throwing a cel?

 

check the exhaust for a patato

 

did that, but i think i found the problem. i decided to check my timing belt jut to see if it jumped timing, and well, the timing belt is really loose, so it leads me to believe my tensioner is bad and it DID jump timing and when it advances it falls on its face, does this make sense to anyone, if not i just found ANOTHER problem,

 

Eek if it jumped too bad, your head might be trash. Best of luck to you my friend. If it was off im sure that was your problem, Check the mark on the crank and the marks at top dead center on the cam gears

 

check your intercooler pipes/upper-lower/maf/ check your timing / lower your boost - check your vacum lines, if still there is a problem. Do not drive your car before you get it inspected or it will turn into something even worse.

 

ok, i checked the timing and the crank is on the t and everything else checked out to be fine.... im really stumped here...

 

IC pipe is loose and as you build boost, you get blow by.......atleast that was my experience.

 

i just did another boost leak test and the only leaks are the throttle body and it leaks alot from the crank case vent that goes back into the intake...

 

Try checking your idle air bypass. When the thermal wax plug would go bad on my DSMs (happened on my JDM GVR4 and 95 Eclipse GS-T) the idle stepper motor made a sound just like your mentioning and wouldn't hold an idle worth a crap. The reason it did this it was trying to compensate for the mismatch between engine coolant temp that the ECU saw and where the engine idle was. Since the wax pellet in the throttle body changed the airflow that bypassed the throttle body when it warmed up a neglected coolant system flush or faulty wax pellet would cause the stepper motor to go crazy until the BISS (basic idle set speed) screw was adjusted to compensate. A common thing to do was block the passage and reset the BISS screw if you lived in a climate that was fairly moderate in temp change otherwise you had to either adjust it once hot and suffer cold weather idle issues or vice versa. From the looks of the Evo throttle body I would guess the issues are the same. Worth a look since you've checked the obvious. There is also a resistance check across the coils on the stepper motor that was spelled out in my old manuals since a flaky stepper motor would do the same.

 

Did you get this fixed??

Sounds like a leak or one of your intercooler hoses came off. I would check all your hoses and make sure they are tight.