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Old 11-25-2012, 04:40 PM   #1
warmkop
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Default Need help making power 94tt

i drained the powersteering and bled it with new fluids.
oem fan shroud is still in place.took the thermostat out thought it was the fault but it was not that.thermostat is still out. I looked in the TSRM but they dont say anything how to test the fan.
Wen i drive normally the heat gauge is half as soon as i boost her the heat goes up wen i drive normal again the heat goes down.
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Old 11-25-2012, 05:02 PM   #2
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Originally Posted by warmkop View Post
i drained the powersteering and bled it with new fluids.
oem fan shroud is still in place.took the thermostat out thought it was the fault but it was not that.thermostat is still out. I looked in the TSRM but they dont say anything how to test the fan.
Wen i drive normally the heat gauge is half as soon as i boost her the heat goes up wen i drive normal again the heat goes down.
If I were to guess, it's more likely to be the water pump. However, I agree the fan is a possible suspect as well. At this point, I'd say swap out the fan and if that doesn't fix it maybe Toyota will take it back. Either that, or maybe you can find another MK4 owner that will let you swap his fan for a test...
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NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 11-25-2012, 05:07 PM   #3
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Default Need help making power 94tt

Im also thinking water pump but not sure.it is a lot of work to change it just on maybe but i take it i dont have a choice.
how is it the pump works fine under normal driving and not under boost.
the heater pipes i blank off at the back off the head that cant be the fault

Last edited by warmkop; 11-25-2012 at 05:39 PM.
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Old 11-26-2012, 07:04 PM   #4
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Default Need help making power 94tt

Could it be the headgasket leaking.it is a new oem one with arp headbolts just wandering
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Old 11-27-2012, 12:29 AM   #5
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Could it be the headgasket leaking.it is a new oem one with arp headbolts just wandering
Very unlikely, unless there was a flaw in the head. I once saw a head where the chamber had small chunks of aluminum missing everywhere - of course, they were trying to run high boost on pump gas with a single turbo.
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
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Old 12-06-2012, 02:23 PM   #6
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Default Need help making power 94tt

the miss on the car got even worse now it misses wen i just rev her changed plugs did not help going to borrow coils tonight to test.will MSD coils be better to buy for my car and will they work with the oem ecu
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Old 12-07-2012, 01:47 AM   #7
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the miss on the car got even worse now it misses wen i just rev her changed plugs did not help going to borrow coils tonight to test.will MSD coils be better to buy for my car and will they work with the oem ecu
No, stick with oem coils. There are a couple other alternatives though:
http://www.superspark.com.au/producttoyota.htm
http://mojoperf.com/drupal/node/15
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.


NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.

Last edited by pwpanas; 12-07-2012 at 02:28 AM.
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