1jz in MA61 making boost problem

**Sideways Supraboy** · 04-11-2010, 06:37 PM

Ok so had the turbos off so thought may as well get Adelaide Turbo Service to check them over and they were given the all clear.Chucked them back on today.
So im thinking its gotta be a boost leak somewhere.
Finding its the hard bit.
Thanks
Steve

**CrUZida** · 04-11-2010, 07:11 PM

0psi is a serious boost leak!

**thechuckster** · 04-11-2010, 07:13 PM

would a broken BoV result in 0psi? or just less boost?

**rxfc3s** · 05-11-2010, 02:36 PM

What rpm does your car idle at?
I would be checking all your vac lines and making sure they are all plugged/connected.
Is the car fitted with a one way valve in the brake booster?

Andrew

**CrUZida** · 05-11-2010, 02:42 PM

Originally Posted by Sideways Supraboy

Well the cars not rego'ed so I can't drive it

Can you expand on this?
How do you know its not boosting if you aren't driving it?

**Sideways Supraboy** · 06-11-2010, 10:52 AM

Yea it idles alright. I'll keep searching. Might take if for a dyno tune next week.

Well the car dosent have any rego because it's going to be just a track car so to drive it I've been just driven it up and back a dead end street.
Thanks for all the help
Steve

**CrUZida** · 06-11-2010, 01:33 PM

Fair enough, should be more than enough room to make boost.

Its worth noting that on JCMO's 1GGTE, we were only making 2psi or so at full noise, yet the car drove and idled acceptably. Turns out that one of the injectors had failed, and wasn't opening.

Replaced the injector, and had full boost.