Help! No Boost control!

Q&A regarding engines, turbos, and intercoolers and power upgrades

Re: Help! No Boost control!

Postby psipwrd » Wed May 23, 2012 6:11 pm

I didn't check the CEL, had it towed to a shop. The mechanic said it's the distributor rotor. Waiting on parts and install...
Members don't see the above ad. Register now - it's free!
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Wed May 30, 2012 7:43 pm

That fixed it but still have CEL, low boost. Will check CEL this weekend.
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Thu May 31, 2012 6:47 pm

I pulled my CELs and...wow...

12, 14, 22, 24, 31, 34, and 54. The mechanic didn't reset after changing the distributor rotor. I reset the codes tonight, drove for about 30 mins, and only 22 came back so far. I'll check the plug tomorrow and order the water temp sensor if that looks good.
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Fri Jun 01, 2012 3:43 am

The green plug is missing, and I can see two pins sticking out of what's left of the sensor.

Image
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby underscore » Fri Jun 01, 2012 5:18 am

water neck? pretty sure that ones for the AC, it was broken on my RC.
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3792
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Help! No Boost control!

Postby psipwrd » Fri Jun 01, 2012 4:00 pm

Should I open a new thread under troubleshooting?

What does it mean if I can hear my coolant boiling? I drove, filled radiator, drove, filled IC. Topped off and still boiling.

:shrug:
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby underscore » Tue Jun 05, 2012 6:09 am

Sounds like a leak somewhere
★ 1991 GTFour RC ~ "Rebel Scum" ★
It's for sale! http://www.alltrac.net/phpBB2/viewtopic.php?f=64&t=52181
Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
underscore
GTFour God
 
Posts: 3792
Images: 0
Joined: Mon Apr 09, 2007 11:29 pm
Location: Kelowna, BC

Re: Help! No Boost control!

Postby l0ch0w » Wed Jun 06, 2012 12:36 am

You need to perform a leakdown test I think. It could be your headgasket...

Be careful though, the turbo makes boiling sounds when u shut it off... its supposed to...

IIRC the green plug is your coolant temperature sensor. They are retarded cheap to replace, and I can get you a replacement plug if yours has been ripped off...

That green plug, if not installed, will essentially cause your motor to run as if it were cold, which means tons of fuel, rev limit, and tons of timing. The main temperature sender is a pretty important component for your engine to run properly...
Andrew

1991 Red Alltrac
Frankenstein engine, lots of mods :P
User avatar
l0ch0w
Established Member
 
Posts: 1137
Joined: Thu May 31, 2007 7:38 pm
Location: Lansing KS

1991 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Wed Jun 06, 2012 2:23 pm

I ordered the sensor on the 1st, hoping to get it by the 8th. I think this will fix my problems as I only have CEL code 22. I'll raise the front, top off the coolant and go from there.

Thanks for the input!!
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Tue Jun 12, 2012 8:05 pm

I got the sensor installed and all CEL codes are cleared. The car's driving perfectly fine. I still hear boiling after a hard drive. The boost is at 7psi in all gears and adjusting the MBC doesn't change it. It was all good before disconnecting the TVSV. What should I do to get boost back?
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Sun Jun 17, 2012 9:26 am

I found my original problem. I used a boost controller that I stowed in the toolbox about 7 years ago. Well, when I stowed it, I put the ceramic ball under the spring and the ball bearing in the side port so I wouldn't lose it. The ball bearing was blocking the wastegate signal, causing the pressure to build up in the boost controller. :doh: 7 years is a long time :shrug:

The mbc didn't leak at all in the past but it now it's leaking so bad I could barely make 7 psi. The car is all back together and running perfect, TVSV and mbc disconnected, and line from compressor nipple directly to the wastegate. I'm getting 5 psi like this.

Where else could the pressure have built up? What other damage could I have done?
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Re: Help! No Boost control!

Postby l0ch0w » Sun Jun 17, 2012 5:13 pm

Boiling after a hard drive is normal with the CT series turbos, they are designed to boil coolant in them to help them cool faster after shutdown. Listen carefully, its the CHRA thats making all those "gurgly" noises..

As for boost, go and get yourself a decent MBC... It seems strange that you wouldnt be boosting to stock levels... if your wastegate controller isnt seeing boost reference at all, or if there is a leak then you would be seeing high boost pressures. If your wastegate is seeing full manifold pressure that is not bled off by a boost controller, then you will be seeing stockish boost levels (7-9psi)

If you are seeing under 7psi of boost then something is wrong... either with your wastegate controller spring, your turbo, or you have a massive boost leak, or your timing is way off.
Remember, if your motor is otherwise healthy and you blow a wastegate controller line, then your boost will go WAAAY up, not the opposite...

Get your motor healthy before trying to up your boost...
Andrew

1991 Red Alltrac
Frankenstein engine, lots of mods :P
User avatar
l0ch0w
Established Member
 
Posts: 1137
Joined: Thu May 31, 2007 7:38 pm
Location: Lansing KS

1991 Toyota Celica

Re: Help! No Boost control!

Postby l0ch0w » Sun Jun 17, 2012 5:21 pm

Also IIRC the TVSV is normally closed when not plugged in, which means that boost will be significantly lower as a large amount of boost reference pressure will not be let off... Which means that your MBC will need to let off alot more in order to increase boost...

If you really want to see if this is the problem, just plug the boost reference line to your wastegate, and see where your boost spikes to...
Andrew

1991 Red Alltrac
Frankenstein engine, lots of mods :P
User avatar
l0ch0w
Established Member
 
Posts: 1137
Joined: Thu May 31, 2007 7:38 pm
Location: Lansing KS

1991 Toyota Celica

Re: Help! No Boost control!

Postby psipwrd » Sun Jun 17, 2012 7:44 pm

I ordered a hallman, but I think it's the manifold gasket. I noticed some ticking while the engine's cold. Now I notice a high pitch whistle or whine at idle. In neutral when I raise the revs, the whistle is there. Under load when i raise the revs, it's gone. I think it's exhaust gases escaping right before the turbo so I soaked the heat shield bolts with liquid wrench.
1992 Toyota Celica GT-Four CS (#4025)
Image
psipwrd
Club Member
 
Posts: 219
Joined: Sat Feb 18, 2012 10:02 am
Location: Germany

1992 Toyota Celica

Previous

Return to Performance and Power

Who is online

Users browsing this forum: Google [Bot] and 2 guests