Turbo control solenoid
02-07-07, 10:33 PM
#1
Senior Member
Thread Starter
Join Date: Aug 2002
Location: Hawaii
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
Turbo control solenoid
I am curious how many people have had thier turbo control solenoid fail? (the one with the mitsubishi symbol on it) I was wondering becuase i'm currently on my 3rd one and i think it's failing again.. is there any possible reason why this specific solenoid keeps failing?
02-08-07, 01:20 AM
#4
If you are talking about the pressure side TC solenoid "E" that is in the rats nest lower rack, then I can tell you that this solenoid is problematic as it has a bad habit of sticking--probably because there is not enough return spring pressure on it's plunger to overcome the boost and release (vent) it. I think this is a design or application problem with this solenoid and is not a solenoid failure, per se. Unfortuanately, the result is that the TCA (actuator) stays open and prevents the sequential system from reverting to primary operation and making normal boost under certain driving conditions.
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
02-08-07, 01:44 AM
#5
Senior Member
Thread Starter
Join Date: Aug 2002
Location: Hawaii
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
actually i'm talking about the solenoid on the Air control vavle thing, on the side, not in the rack. I am currently running a pfc straight pipe intake, ignition, basic stuff. I have relocated my solenoid behind the ABs so heat isn't as big of an issue nemore
02-08-07, 01:58 AM
#6
Team Benjos Captain
iTrader: (2)
Join Date: Aug 2005
Location: Greenwood/Hartsville, SC.
Posts: 2,720
Likes: 0
Received 1 Like
on
1 Post
Originally Posted by Speed of light
If you are talking about the pressure side TC solenoid "E" that is in the rats nest lower rack, then I can tell you that this solenoid is problematic as it has a bad habit of sticking--probably because there is not enough return spring pressure on it's plunger to overcome the boost and release (vent) it. I think this is a design or application problem with this solenoid and is not a solenoid failure, per se. Unfortuanately, the result is that the TCA (actuator) stays open and prevents the sequential system from reverting to primary operation and making normal boost under certain driving conditions.
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
02-08-07, 02:05 AM
#7
Funny, I've never had a problem with that solenoid, even after 157,000 miles. That's the one that handles the vacuum side of the TCA. Are you sure you don't have a problem with the other (pressure side) solenoid? They are well known for sticking and/or operating intermittently.
How much boost do you run? The TC solenoid "E" is marginal at stock boost levels and the more boost you run, the more likely you are to have a problem with the TC pressure side solenoid operating erratically.
How much boost do you run? The TC solenoid "E" is marginal at stock boost levels and the more boost you run, the more likely you are to have a problem with the TC pressure side solenoid operating erratically.
Trending Topics
02-08-07, 10:24 AM
#9
Are you sure you have the lines going in correct? I've tested many of these solenoids, and only a few hold vacuum well in both directions. Most of them do quite well at holding vacuum in just one direction - so you might try crossing the hoses that attach to it.
Dave
Dave
02-08-07, 10:50 AM
#10
Yeah, I put in a pressure regulator off of the pressure ank, so no matter how much boost I run, the pressure solonoid only ever sees 9-10 psi. Sticking problem solved.
Originally Posted by Speed of light
Funny, I've never had a problem with that solenoid, even after 157,000 miles. That's the one that handles the vacuum side of the TCA. Are you sure you don't have a problem with the other (pressure side) solenoid? They are well known for sticking and/or operating intermittently.
How much boost do you run? The TC solenoid "E" is marginal at stock boost levels and the more boost you run, the more likely you are to have a problem with the TC pressure side solenoid operating erratically.
How much boost do you run? The TC solenoid "E" is marginal at stock boost levels and the more boost you run, the more likely you are to have a problem with the TC pressure side solenoid operating erratically.
02-08-07, 01:05 PM
#11
If you want to solve for ever the solenoid problem buy 3 solenoids from 96+ fd3s who have solenoid box.The solenoids from black box never stack and is all mitsubishi not hitachi.
The only thing I dont know is what type is correct but both is working B6AT-18-741 or FEGC-18-741.
You have to make an adaptor with wire from your solenoid connector to new solenoid very easy to do.
This mod is discovered first by efso member of this forum.
The only thing I dont know is what type is correct but both is working B6AT-18-741 or FEGC-18-741.
You have to make an adaptor with wire from your solenoid connector to new solenoid very easy to do.
This mod is discovered first by efso member of this forum.
02-24-07, 12:29 AM
#15
Senior Member
Join Date: Apr 2006
Location: Brooklyn New York
Posts: 474
Likes: 0
Received 0 Likes
on
0 Posts
Sorry to bust this thread up but i think i might be having the same problem. Some times i get boost and some times i dont. Its actually driving me nuts. When she does have boost she flys like a bat out of hell but 90% of the time when she doesnt have boost shes dead. And i know everything is hooked up right because like i said i get boost sometimes. How do you check the turbo control Solenoid?
02-24-07, 02:01 AM
#16
What's your point ?
Join Date: Feb 2001
Location: Gainesville, Fla.
Posts: 3,573
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Speed of light
If you are talking about the pressure side TC solenoid "E" that is in the rats nest lower rack, then I can tell you that this solenoid is problematic as it has a bad habit of sticking--probably because there is not enough return spring pressure on it's plunger to overcome the boost and release (vent) it. I think this is a design or application problem with this solenoid and is not a solenoid failure, per se. Unfortuanately, the result is that the TCA (actuator) stays open and prevents the sequential system from reverting to primary operation and making normal boost under certain driving conditions.
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
Tired of dealing with this, I developed a simple work around to this problem. If there is interest, I will write it up and post it .
I'm on my second one and would like to know how you worked around it.
02-24-07, 10:54 AM
#17
The workaround is a pressure regulator. If you regulate the pressure chamber to 8psi, the turbo control solenoid will work much more reliably. Without the regulator, the turbo control solenoid has to fight against 12+psi depending on how much boost the turbos are producing.
Dave
Dave
02-24-07, 11:57 AM
#18
Originally Posted by Goukid2
How do you check the turbo control Solenoid?
Edit: never mind, see the next post. Thanks for the correction Dave
Last edited by dontlift; 02-24-07 at 12:23 PM.
02-24-07, 12:02 PM
#19
Don't check the turbo control solenoid that way. It's not sufficient.
Do it the way Dave Disney developed:
https://www.rx7club.com/showthread.p...ntrol+solenoid
Dave
Do it the way Dave Disney developed:
https://www.rx7club.com/showthread.p...ntrol+solenoid
Dave
03-19-07, 05:16 PM
#23
Potato Love
Mine turned out just to be the vacuum line collapsed and pinched off flow to the solenoid. I had ordered a new one so I replaced it anyway while the UIM was off. it was at about 58K miles.
03-19-07, 06:37 PM
#24
Rotary Enthusiast
iTrader: (1)
Join Date: Feb 2004
Location: UK
Posts: 899
Likes: 0
Received 0 Likes
on
0 Posts
speed of light more info on the fix it solution. I noticed after getting my hands on another 20 solenoids that no of them could handle much over 11psi before locking and not reverting back to a closed state , so i either buy some aftermarket replacements or you should shed some light on the fix solution,,, thankyouuuuuuuuuuu :-)
03-20-07, 03:52 PM
#25
Full Member
Join Date: Mar 2005
Location: Rockdale GA
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
This may be the fix. That was being mentioned.
https://www.rx7club.com/showthread.p...9&page=1&pp=15
https://www.rx7club.com/showthread.p...9&page=1&pp=15