I got a problem with my Turbo II 87
it doesnt boost properly, turbo works and all accesories

there is no exhaust on at all, could that give me a low boost problem
and also no air filter at all

and the air pump is off the car as well

any suggestions?

 

Twin scroll not working/ got unplugged maybe?

 

whats a twin scroll?

 

The twin scroll system has a little flapper in the turbo that directs exhaust at the turbine from a differnt angle so it spools faster. Then I think the flapper opens at a certain rpm to allow the turbo to continue building to full boost.

Are you getting slow boost or low boost? or both? What rpm does it make full boost or start to really pull?

Having no exhaust should make your turbo spool faster and give you higher maximum boost, same with no air filter, air pump shouldnt matter either.

 

u said twin scroll may be unpluged?

how can it be unpluged??
where do I go testing and checking?? for it?

 

http://www.fc3s.org/how_tos/manuals/...TEMS_TURBO.pdf

Go to page 54

 

hey if u dont mind
add to msn sick_mx3@hotmail.com
I got some other quick question id u dont mind

 

I don't have msn, if you have aim we can talk or you can email me at maynard5000@myway.com

 

oki cool man
I appreciate it
little history:

I just bought a turbo II, not running
and fixed things here and there, like the fuel pump
and some tuning adjustments

I just got it back from the body shop and took off the exhaust cuz I am gonna do a custom 3" front to back with 2.5" y-pipe

but now I got this problem that its not boosting correctly
I went for a ride today, and it ran poorly (very little boost)
however it boosted only once properly for a short time between 5 and 6000 rpm

 

I suppose it could be a vacuum leak too if the car doesn't idle correctly. Did it boost ok before you took the exhaust off or before you went to the body shop?

Search through all these threads too

https://www.rx7club.com/search.php?s...der=descending

 

thanks man
I will try all that

its a weird problem, it has a rough idle now, but I think its only cuz of no exhaust and intake
but I am not sure