Rx-7$4$me

ok, so my story was, I found the c clip on the TCA underneath the car had popped off, put it back on, was getting 5 pounds during secondary, then when I popped it back on I got 0 boost, and I Get a huge WOOOOOOOOOOOSh of air flowing out. so tonight, I checked the CRV readings were

like 15-20 HHG or whatever vacuum at idle, then when I floored it before secondary I Got 0-1 psi, and then past 4500 rpms It went up to 4-5psi all the way till redline. is that normal? um, my ccv the one thats right below the CRV and right next to the Y-pipe, looks mighty cooked, so im gonna check that tomorrow, how should I check it? thanks everyone

Stevo

legendr35

make sure the rubber connector that connects to the Y-pipe and the crossover pipe doesn't have leaks. You want to also make sure the Intercooler piping is held on tight.

Rx-7$4$me

already checked those like 8 times hehe

P'cola FD

Although the pressure is a little low, it is reading properly. It shouldn't take much pressure to jeep it closed. Pull your CCA off and test it with a pump. What do you mean when you say "coocked"?

Rx-7$4$me

it looks as if the heat from the y pipe area has partially melted away some of the surface of the entire ccv...... , but IF it wasnt working wouldnt I not get 10 psi from primary? ( I do obviously ) hey picola do you have AIM or anything I could talk to you personally about this?

Stevo

Rx-7$4$me

err, cca the valve right next to the y-pipe below the crv

P'cola FD

Yeah I'm "FD3S 93 Rx7" on AIM.

johnchabin

iTrader: (2)

Is the CCA pulled in when you start the car?

Below 4500 rpm, the CCA sees vacuum (the side that heads through the LIM), holding it closed. Above 4500 rpm, it should see boost, opening the Charge Control Valve between the turbos.

It's quite possible you are seeing the vacuum and getting 10 lbs on the primary, but never seeing boost at the CCA after 4500 rpm - either a failed Charger Control Solenoid (possible), bad hose (behind the CRV) from the y-pipe to the LIM (more likely), etc.

The reason I say the bad hose is more likely is the same hose carries boost to close the Charge Relief Valve to close it above 4500 rpm. Your CCV is probably not opening and your CRV is probably not closing, and that's why you get the WHOOSH.

P'cola FD

His CRV should be closing. It is getting pressure above 4,500, as he said in the first post.

johnchabin

iTrader: (2)

Yeah, I see that now.

Well, if the CCA isn't opening, it's not unusual for that little 1" CRV elbow to blow off or split to relieve some of the pressure from the 2nd turbo.

A split 1" CRV hose or bad CRV would give him the low (4-5 lbs) at the small CRV hose and send his boost into the atmosphere.

P'cola FD

Very true. I sent him off to do a boost leak test tommorrow. Hopefully he will find the answer to his problems.

Rx-7$4$me

ok well today I did the boost leak test, and I could only hear the air flowing through the system but there was no leak as far as I could tell. So I t-d into the CCV I think it is, the one that has the vacuum line that goes into the y pipe( controls the wastegate I think? ) and I got 10-11 pounds till redline, 0 pounds at idle, and then it all leaked out when I hit secondary... is it failing? what should I check now???

STevo

Rx-7$4$me

bump

Rx-7$4$me

bump

johnchabin

iTrader: (2)

STevo:

It's not quite clear what you are saying. It sounds like you T-ed into one of the lines coming off the Charge Control Actuator (this doesn't control the wastegate).

Did you T into the short hose to the y-pipe or the longer hose that goes through the Lower Intake Manifold?

You got 10-11 lbs of pressure or vacuum until redline?

If you got 10-11 lbs until redline, what do you mean it all leaked out when you hit the secondary turbo?

Rx-7$4$me

ok, I t'ed into a random line, im not sure if it served purpose, but I remember reading to tee into that like before I think. Its the one that goes from the top of the y-pipe, to one of the 3 nipples on the CCA I think, or CCV whatever it is thats right below the CRV and bolted to the ypipe. I got 10-11 pounds of pressure till secondary kicked in at 4500 rpms, and it all leaked out to 1 pound just like all my boost does.

spooledUP7

Exactly, I don't think you tested it correctly, and or didn't write it out correctly. Your results are indicative of what would have happend if you Teed into the shorter y-pipe to CCV hose. 10-11PSI until 4500 RPM and then no boost. I think that johncabin had it right that you should be looking at the hose furthest to the firewall on the y-pipe. If anything, the entire system between that hose and the CCV should be checked. If there isn't any boost present on the CCV longer hose, you will have the problems you are talking about.l

P'cola FD

The line to "T" into is the one that goes from the LIM to the CCV. Not the small u-shaped hose going from the y-pipe to the CCV.
Also, during the boost leak test, you shouldn't hear air "flowing" at all. It will just build up pressure and not go anywhere. If you can hear air moving, then you need to find the origin of that sound.

Rx-7$4$me

ok I t'ed into the second line on the CCV today ( the one that goes to the LIM) and I got 20-22 vacuum till 4500 rpms, and then I got 0 psi and the Typical WOOOOOOOOOOOOOOSh all the way till redline..... is this whats the problem? the CCV??

stevo

Rx-7$4$me

bump

johnchabin

iTrader: (2)

You should see 10+ psi of pressure on this line after 4500 rpm. You probably popped off or split the line that is BEHIND the CRV and goes from the y-pipe to the LIM (likely) OR the same line after it goes through the LIM into the rat's nest (not too likely). It continues on to BOTH the charge control and charge relief solenoids.

This means your CCA (the one you checked) and your CRV never see boost. Your CRV stays open and boost is gone.

Probably.

Rx-7$4$me

lol... so what do I check now? what do I do to fix this? I MISS MY BOOSSSSSST MOMMYYYYYYYY!!!!!!!!

johnchabin

iTrader: (2)

Did you check this hose to see if it split or popped off? It's the one I mention above...

saiyan

iTrader: (1)

I have problems with boost too. My leak seems to be coming from the driver's side, I could hear hissing coming from somewhere around the brake booster, intake elbow, etc... at boost. At idle, I could slightly hear the leak, like a little mini-fan. Where else could I check???? other than the IC couplers'''