94 Turbo loss of power

Re:94 Turbo loss of power (MR2QIK)

Mon, 08 Oct 2012 16:35:59 GMT

Good result.

Re:94 Turbo loss of power (purple5ive)

Sun, 07 Oct 2012 22:18:32 GMT

glad it was such a simple thing..
cheers

Re:94 Turbo loss of power (track_mr2)

Sun, 07 Oct 2012 20:42:45 GMT

Got the new sparkies, fixed the issues. No more hesitation and making full boost again. " />

Re:94 Turbo loss of power (track_mr2)

Mon, 01 Oct 2012 08:49:55 GMT

The concern was never really for the block as its just putting in less boost then normal. The concern would be for the turbo as its spinning unrestricted.
The cylinders were all about the same and reading around 160-165psi on the compression gauge. Vacuum is around the -20 off the boost gauge. The car still pulls hrd at partcial throttle its only WOT that was an issue.
Got some new ignition parts comming in from overseas as its much, much cheaper then australia, so should sort the missfire. Got 4 iridium plugs for $50 australia, leads for $50, cap for $30 and the button I bought here for $16.

Re:94 Turbo loss of power (kameleon)

Mon, 01 Oct 2012 00:21:51 GMT

Daon't agree with that but ok.

what were the comp numbers?

Re:94 Turbo loss of power (track_mr2)

Sun, 30 Sep 2012 18:21:56 GMT

I got a 94, so it runs off a MAP sensor not an air flow meter, so it gets the air fuel mixture right still even with a boost leak so would be alright to keep going around the track. Would be under less stress then usual. Compression, vacuum and all are good. With the knock sensor and its fail safe mode in the MR2 it's pretty good at picking up any kind of issue and stopping any major damage.

Re:94 Turbo loss of power (kameleon)

Sun, 30 Sep 2012 17:29:44 GMT

I hope you get your issue sorted soon, but driving the car on the track in that state should have meant you just drove it home...

Done a compression test yet?

Re:94 Turbo loss of power (track_mr2)

Sat, 29 Sep 2012 21:09:29 GMT

Awesome, got all the plugs out today and all were brown except for cylinder 3, that was black " />. Got new ignition parts on the way so all should be good.

Re:94 Turbo loss of power (track_mr2)

Tue, 25 Sep 2012 09:48:53 GMT

Definately no the BOV because I wouldn't be able to get more boost when I hit high boost on the controller. I coould hear the BOV functioning properly as well. I dont think its a boost related issue, I definately think everything is able to boost properly but I'm sure the car is in safe/low boost mode as that explains the 3psi less at every setting and the hesitation with lack of power.
The car is not parked where I live so I will check it on the weekend and see if unpluggin the MAP sensor triggers a code. I spoke to REV Zone and they said the power FC's still interface with the diagnostic port so I'd be suprised if the Mines chip doesn't also. I do get the steady flashing light still when bridging ports.
I might give the fuel filter a shot as it could be partically blocked causing lower pressure. Low fuel pressure will 100% cause a knock.

Re:94 Turbo loss of power (purple5ive)

Tue, 25 Sep 2012 09:31:42 GMT

Dont remember the CEL flashing
car was just driving ok on low boost and as soon as i started to accelerate/boost the turbo would be whining away but the car not go anywhere and get a bit of hesitation and shuddering
did the Error codes and got 54 i think changed the knock sensor and all was back to normal.

i know you said you checked the bov but maybe remove it and block the port and see if thats also causing it.

did you unplug the Map sensor and see if the the ECU gave any error codes??

Re:94 Turbo loss of power (track_mr2)

Mon, 24 Sep 2012 22:25:27 GMT

purple5ive, do you remember if your check engine light was flashing when your knock sensor went? Was there anything on the dash telling you your in low boost/limp mode?

Re:94 Turbo loss of power (purple5ive)

Mon, 24 Sep 2012 20:51:37 GMT

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.

Re:94 Turbo loss of power (track_mr2)

Mon, 24 Sep 2012 20:06:48 GMT

Hey, I was thinking origionally it could be the knock sensor but no fault codes came up on the diagnostic. I called toyota about it and asked if the knock sensor is faulty will it always register on the diagnostic port or is there cases where it wont but they said it will always register if it's faulty. Does anyone know if having a chipped ecu means the diagnostics are always clear and no faults show?
What i'm thinking is I can unplug the MAP sensor and run the diagnostic and see if that sets a fault code. Will unplugging the MAP sensor trigger a fault code? I would assume it breaks the circuit and should trigger a fault to register right?

Re:94 Turbo loss of power (purple5ive)

Mon, 24 Sep 2012 19:05:39 GMT

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

Re:94 Turbo loss of power (track_mr2)

Mon, 24 Sep 2012 18:06:34 GMT

Had another thought on what it could be. Maybe a fueling issue like the blocked filter or problem in rising rate regulator. If it isn't getting enough fuel could explain why it runs better at partical throttle rather then full as its gettign the correct air fuel ratio, also as it will run lean at higher boost because of the lack of fuel, could cause it to ping thus setting low boost condition, limiting boost and retarding the timing....
I'll have to see if I've got a fuel pressure guage sitting around. Hope its as simple as a blocked fuel filter.