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ST205 Boost Problem - 6G Celicas Forums

Topic #75546 15 posts Started by cax_11
cax_11
#1
I got my car about 2 weeks ago, and it does't hit full boost on the stock guage like those I see on youtube, There is no check engine light, I already reset the ecu, one day the boost went right up out of the blues and it pulled like crazy, but next day it stopped, any ideas anyone?? Any input is appreciated, I don't think its a boost leak because it doesn't fall back, it just stops around 3/4 up the boost guage and sometimes crawl up the rest of the way(sometimes).
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
Anabolik
#2
>
QUOTE (cax_11 @ Aug 19, 2010 - 11:30 AM) *
>I got my car about 2 weeks ago, and it does't hit full boost on the stock guage like those I see on youtube, There is no check engine light, I already reset the ecu, one day the boost went right up out of the blues and it pulled like crazy, but next day it stopped, any ideas anyone?? Any input is appreciated, I don't think its a boost leak because it doesn't fall back, it just stops around 3/4 up the boost guage and sometimes crawl up the rest of the way(sometimes).



I already gave a lot of advice. There is another idea, perhaps a catalyst, he just struggled or scattered. rolleyes.gif
I was such. The pressure did not rise above 0.5 bar.

sorry for my english)
translate with google translete kindasad.gif
Celica GT-Four'96Corona Premio GT-FourCurren Club-RussiaI on YouTube
cax_11
#3
>
QUOTE (Anabolik @ Aug 19, 2010 - 7:33 AM) *
>>
QUOTE (cax_11 @ Aug 19, 2010 - 11:30 AM) *
>I got my car about 2 weeks ago, and it does't hit full boost on the stock guage like those I see on youtube, There is no check engine light, I already reset the ecu, one day the boost went right up out of the blues and it pulled like crazy, but next day it stopped, any ideas anyone?? Any input is appreciated, I don't think its a boost leak because it doesn't fall back, it just stops around 3/4 up the boost guage and sometimes crawl up the rest of the way(sometimes).



I already gave a lot of advice. There is another idea, perhaps a catalyst, he just struggled or scattered. rolleyes.gif
I was such. The pressure did not rise above 0.5 bar.

sorry for my english)
translate with google translete kindasad.gif


Was just seeking more advice, to see if anyone else had the same problem, and I don't have a boost guage other than stock as yet so I can't raise boost,
I am thinking about guttin the cat soon thought, I hope that helps my problem.
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
Smaay
#4
sounds exactly like a boost leak. check the vacume lines on the wastegate or in your piping
2001 Celica GT-S Turbo1997 Supra TT 6speed1997 Celica 3MZ/1MZ swap1990 Celica All-Trac
cax_11
#5
>
QUOTE (Smaay @ Aug 19, 2010 - 1:39 PM) *
>sounds exactly like a boost leak. check the vacume lines on the wastegate or in your piping


Will check for boost leaks later. But it puzzles me because for about a day it worked flawlessly, boost right up everything ok, then all of a sudden, began doing the same thing again. frown.gif
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
CELL_PROTOTYPE_X
#6
Maybe your gauge is just messed up....buy an aftermarket gauge and check your boost level then. I've heard the stock gauge isn't that great anyway.
cax_11
#7
>
QUOTE (CELL_PROTOTYPE_X @ Aug 20, 2010 - 3:20 PM) *
>Maybe your gauge is just messed up....buy an aftermarket gauge and check your boost level then. I've heard the stock gauge isn't that great anyway.


Thanks, already on my to buy list, ordering one soon
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
schmooot
#8
my stock gauge doesn't go above 3/4 while the aftermarket one shows 12psi at full boost.

Can you feel a lack of boost or are you relying on your gauge to tell you?
ST205 Crew representChallenge Accepted
salv
#9
Best way to find out is to get an aftermarket boost gauge.

Also, The ECU actually affects the amount of boost your turbo is going to give out depending on the conditions it detects (8-10psi in 1st and 2nd gear and anywhere from 10-14 psi on all other gears)
ST205 WRC13.2 @103mph
cax_11
#10
>
QUOTE (schmooot @ Aug 20, 2010 - 3:42 PM) *
>my stock gauge doesn't go above 3/4 while the aftermarket one shows 12psi at full boost.

Can you feel a lack of boost or are you relying on your gauge to tell you?


The stock guage went all the way for a few hours one time, and I felt a huge difference. I am in the process of getting an
aftermarket boost guage to see exactly what it does. Cause I've heard that the stock guage isn't very accurate.

>
QUOTE (salv @ Aug 21, 2010 - 1:29 PM) *
>Best way to find out is to get an aftermarket boost gauge.

Also, The ECU actually affects the amount of boost your turbo is going to give out depending on the conditions it detects (8-10psi in 1st and 2nd gear and anywhere from 10-14 psi on all other gears)


But about what rpm should the turbo be a full boost?? Because with mine it only closes in on full boost at like 5-7k rpm.. (on the stock boost guage)
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
schmooot
#11
>
QUOTE (cax_11 @ Aug 29, 2010 - 9:07 AM) *
>>
QUOTE (schmooot @ Aug 20, 2010 - 3:42 PM) *
>my stock gauge doesn't go above 3/4 while the aftermarket one shows 12psi at full boost.

Can you feel a lack of boost or are you relying on your gauge to tell you?


The stock guage went all the way for a few hours one time, and I felt a huge difference. I am in the process of getting an
aftermarket boost guage to see exactly what it does. Cause I've heard that the stock guage isn't very accurate.



its not that the stock gauge isn't accurate...it is just far too slow to get up to the boost level that the turbo is producing. The needle should rise at least as fast as your rpms...my aftermarket gauge is already showing my max boost before the stock gauge barely makes it past zero.
ST205 Crew representChallenge Accepted
Nial
#12
Have you done an error code check??

This post has been edited by Nial: Aug 30, 2010 - 1:35 AM
My Facebook GT4 Build page.https://www.facebook.com/groups/GT4Rebuild
Driveby
#13
Check the coolant level in your charge cooler.
1994 JDM GT4 WRC
cax_11
#14
>
QUOTE (Driveby @ Aug 30, 2010 - 2:54 AM) *
>Check the coolant level in your charge cooler.


Already did, when I open the cover, its running out, and thats when the engine is cool, and there is no check engine light.
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
cax_11
#15
>
QUOTE (Driveby @ Aug 30, 2010 - 2:54 AM) *
>Check the coolant level in your charge cooler.


yep, has no codes store, lights flashes continuously.

>
QUOTE (schmooot @ Aug 29, 2010 - 11:20 PM) *
>>
QUOTE (cax_11 @ Aug 29, 2010 - 9:07 AM) *
>>
QUOTE (schmooot @ Aug 20, 2010 - 3:42 PM) *
>my stock gauge doesn't go above 3/4 while the aftermarket one shows 12psi at full boost.

Can you feel a lack of boost or are you relying on your gauge to tell you?


The stock guage went all the way for a few hours one time, and I felt a huge difference. I am in the process of getting an
aftermarket boost guage to see exactly what it does. Cause I've heard that the stock guage isn't very accurate.



its not that the stock gauge isn't accurate...it is just far too slow to get up to the boost level that the turbo is producing. The needle should rise at least as fast as your rpms...my aftermarket gauge is already showing my max boost before the stock gauge barely makes it past zero.


Ok then, guess I'll wait until my guage arrives to do more tests. My flex pipe in the exhaust is leaking, but am sure that would have nothing to do with it
1994 Toyota Celica GT-Four ST205 Turbo 4WD, BlackNevis, West Indies
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