Boost Problem Pt. 2 -- It *won't* boost more than 2psi after I shift. (please help)
Thread Starter
Call me gramps!
Joined: Jul 2003
Posts: 2,334
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From: Detroit, MI
Originally Posted by arutha
Yeah. I've tested from both turbo control solenoids to the TCA and couldn't get a leak in that direction either. Plus all those hoses are new. I'll probably check all those again anyway.
Walien, did you have a problem with your transition fluttering?
Walien, did you have a problem with your transition fluttering?
Have you tested your solenoids with a 12v source? If so, try heating the solenoids a little (to simulate underhood temperatures) then test them.
Originally Posted by WaLieN
Yes, I did have a problem with my transition. In the single gear that did boost all the way from low>>high-rpm, it fluttered during transition a few times before it actually transitioned.
Have you tested your solenoids with a 12v source? If so, try heating the solenoids a little (to simulate underhood temperatures) then test them.
Have you tested your solenoids with a 12v source? If so, try heating the solenoids a little (to simulate underhood temperatures) then test them.
Hey Walien. Yeah I have tested all solenoids and actuators while hot. I found that my CCA was sticky when hot. I should have a new one later this week and will report my findings. But I have a feeling that it will only fix my fluttering transistion. But I am willing to wait and see.
I have posted in a few and just making sure I reply to them all since I hate reading posts without fixes.
Check here.
https://www.rx7club.com/showthread.p...=1#post3582544
Check here.
https://www.rx7club.com/showthread.p...=1#post3582544
Thread Starter
Call me gramps!
Joined: Jul 2003
Posts: 2,334
Likes: 0
From: Detroit, MI
Originally Posted by arutha
I fixed mine this morning. And do I feel stupid. Hopefully the rest of you have the same problem so I won't feel as bad. 
But I had the pressure/vacuum hoses switched for the TCA. I have no idea how I had secondary boost the first try and then it fail. But anyway now I get it all the time and boy is it nice. Feels amazing. hehe
The area between the rats nest and the metal pipes by the airpump is where they weren't connected right. I went out with one T-ed and saw pressure and it appeared to work correctly in the sense of when it applied pressure and when it released it. Then I got under the car and applied pressure to that same hose with my mityvac and the arm never moved. So I tried vacuum. Then it moved and then I knew I F'ed up.
So go double check that.
But I had the pressure/vacuum hoses switched for the TCA. I have no idea how I had secondary boost the first try and then it fail. But anyway now I get it all the time and boy is it nice. Feels amazing. heheThe area between the rats nest and the metal pipes by the airpump is where they weren't connected right. I went out with one T-ed and saw pressure and it appeared to work correctly in the sense of when it applied pressure and when it released it. Then I got under the car and applied pressure to that same hose with my mityvac and the arm never moved. So I tried vacuum. Then it moved and then I knew I F'ed up.
So go double check that.
A fluttering transition could also be due to a lack of a pill in your prespool line. Since some of you have replaced this hose, I suggest that you make sure the new hose has a pill in it.
rotors + turbos = bliss
Joined: Oct 2004
Posts: 737
Likes: 0
From: Chicago (Mt. Prospect)
if you are getting little to no boost after shift, check out the check valve between the UIM and firewall, before i replaced that i got barely any boost after shifting at high rpm's it cost me 2 dollars btw
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