94 Turbo loss of power

Hi,
 
I've got a 94 MR2 turbo and have run into some power issues :(. Basically I had a track day a few weeks back at Phillip Island and one of the silicone joiners split, dropping the power hugely. I did some patching at the track with tape but it didn't hold well and I ran the whole day with boost leaking and I could only get to about 6psi max boost.
I replaced the split boost hose today and went for a drive but the car is dropping power hugely. It feels as if it missfires around 3000-4500rpm. It definately has  stuter when boost comes on.  Also it doesn't pull anywhere near as hard as it used to. The other odd thing is that on low boost its only making around 8psi when the boost controller is set to 10psi. However if i switch to high boost it will make 11psi boost when the controller is set to 14psi. Nothing on the boost control has been changed, it just feels slow and under powered. No smoke out the back and I pulled the intake pipe off the check the turbo. The compresor wheel spins freely and has about 1mm of play. Even at idle the compresor wheel is spinning by itself so I dont think the turbo is gone. I can't see any boost leaks from joiners. Any ideas what it could be? Has anyone had a similar issue?
 
 

Update......I reset the ecu and the power got a bit better but it is still in safe mode. Boost is always around 3psi less then what it should be and the car moves better at partcial thottle then full throttle. Only option to get a toyota diagnostic on it and see if a sensors out. Anyone else have this happen to them? If s, do you know what the cause was?

Hi,
 
Yeah I did an error code check by bridging the port TE1 and E1. The check engine light flashed steady so I don't believe any sensors are registering a fault.

Hi,
 
I've read quiet a few posts on the net about people having issues based on ignition problems in these. Especially leads. I ran a multi meter to test resistance and thye seem to all pass current through, also the plugs are black (dry/black) but thats normal on a turbo MR2 right? Plugs are iridiums. I wa thining of just changing, cap/rotor/leads and plugs doing another ecu reset and seeing if fixed. Not sure if I'm chasing the right thing though or just deperately hoping?
My other thought was maybe a leak in the intake manifold, maybe the gasket somwhere? Could try the water test and see?

Hey,
 
Yeah I would have gone straight for the ignition but I can't think of a reason why the boost would be effected. The boost seems to be down 3psi on what it should be when on low boost and again 3psi less on high boost. The fact that it gets 7psi or so when it should be 10 and 12psi when it should be 15 is odd. If it was a piping leak, really the wastegate shouldn't open at all and running high boost shouldn't have any kind of increase.
I should mention I have silicone joiners, metal piping and heavy duty clamps. I aqlso have a mines chip in the ecu, so I wonder if low boost could be set but no engine light flashing because of the chip?

Oh, I didn't install the boost controller. Basically I bought the car a few months ago. Everything was running fine and it used to make full boost wihtout an issue befoer the track day. It's also a Gen 3 so no airflow meter. I had a split intercooler joiner at the track but still ran the day with boost leaking. As it's not running a airflow meter and using a MAP sensor it should be okay. However after fitting the new hose I've noticed that the car is not back to what it was. Here are the symptoms:
 
Slow to boost and has a hesitation when boost starts comming on.
Makes around 7-8psi on low boost when set to 10psi
Makes around 11-12psi when boost is set to 15psi.
If I floor the throttle in ny gear it bogs down.
If I apply partical throttle it revs out fine and accelerates faster.
 
What i've done is check for fault codes, none are showing.
Reset ecu. The ecu reset did help a bit however it still is underperforming.
Checked turbo, blades are good, very little play, spins even at idle.
Checked BOV, doesn't seem to be leaking.
Checked piping, all vislible pipes seem good.
Checked vacuum hoses, all seem to be good. I've even pinched shut all vacuum hoses on the intake manifold to see if it makes a difference to idle, none of them did except the stepper motor one, so I would think no leaks.
 Plus are black but dry carbon. They look quiet crappy.
Leads all have current pass through. Resistance is between 7ohm for short one to 24omh for long one.
I can't see any exhaust leaks. 
 

check your knock sensor, could have blown it. that will show all the above symptoms you are describing as well.
cheers
 

from memory the knock sensor will not always trigger a Error code, cant remeber now off the top of my head, but i had a knock sensor blow on mke and remeber seeing a few different opinions on wethere they have error code or not but mine def did have a code i think 54 or something like that.
if you have a spare ecu or can borrow from someone else put that in and check for codes.