have a boost leak - a massive 1, car struggles to get to 10 psi on primary turbo , before i had perfect 10-8-10 now i got 5 and raising (slowly) and then secondary kicks in (after 4500) and i got 10 , i took off all the couplers, investigate them , and i found only 1 little hole in a 1 mm hose i got leading from UIM to BOV i obviously replaced that straight away, also replaced more hoses, goin to actuator and crv replaced two that looked bit suspicious, checked pressure chamber hoses when i pull them out i can hear air escaping so there is some pressure there , did the road test 4 times now and still get the same at 35mph i put my foot down and after 3k boost is slowly going up till revs hit 4500 then its 10 psi...i checked charge control actuator rod pulls in and out as normal...im running out of ideas here, btw how do i test if check valves blow only 1 way? do i need some air compressor or something?

any ideas what it could be?

 

How much mileage on the turbo's. Often one goes bad before the other.

 

its not turbo , if 1st turbo wasnt producing 8psi (at least) secondary turbo wouldnt gone off at all(afaik) i had my turbos replaced last year anyway (2nd turbo was broke, spraying oil to engine bay) im thinking about something simple but im not as experienced with finding boost leaks like some of the peeps here...

 

Check the lines running to your CCA. It's the golf ball sized actuator on the y-pipe.

Dave

 

CCA is fine mate i went through http://autosportracetech.com/RX-7/Tu...aryExplanation and tested if this rod it pulled in or not and it seems to work fine...

i thought it was a check valve (got viton ones) coz i couldnt blow through it either way but after taking it off and playin withit for a while it came back to normal state (somehow) so i could blow through it one way..i put it back in and took it to test drive...still, the same ..from 5 goin slowly to 8 psi then 4500 revs second turbo kicks in normally....

 

i think its the valves, i remember there was someone here selling viton check valve, how do i contact him (i just dont remember)

 

dale clark on the forum sells them i think. Also he sold me mine on ebay and they solved my boost problems.