Im working on replacing the vacum hoses of the Rat Nest under the intake. Knowing that im actually having a problem with the vacum hoses and that my 2nd turbo is not working due to this.

Now i decided to use the Sequential Simplified diagram, but i found out while impleminting that my Pressure Chamber is missing!! IS THERE ANY WAY TO BY PASS IT!! or any Alternative way !!

Kindly Help !!!!!!!!!!!!!!!!!!!!!!

 

The pressure chamber is sort of unnecessary, since the turbo control solenoid is the only solenoid that uses it, and when you're going through the transition there is pressure in that feed line. But since you have a secondary issue I would go ahead and try to find a replacement. It need not be OEM - any similar sized tank will do.

Are you testing or replacing your solenoids? Since you have it all apart, IMO this is critically important.

It is just a tank and a check valve. You need to run a line from the y-pipe to a check valve (with the arrow on the valve pointing away from the y-pipe), and from the check valve to a tank which is maybe 0.5L in size. I wouldn't make it much bigger than that. Note that you don't need a tank with two holes - a single "tee" fitting will work also to connect them all.

The good news is that the pressure tank is easy to access, so if you skip it, it is not hard to install one later.

Good luck.

Dave

 

You sure it's missing? That's a pretty key piece of the system. There is also a small vacuum tank just for automatic cars that's in some of the diagrams.

Seems odd that someone would just totally ditch that tank.

Those tanks are a dime a dozen used, too - I'd just find a good used one and do it right.

Dale

 

I take it you've been perusing the Saudi RX-7 parts market?

 

Thanks a million guys for the help

What i will do, i might just fix everything and just skip the tank now until i get one as DAVE said and since its an easy access one.