help :no boost
 

Please help my rx7.After installed a boost gauge and try to test the boost gauge .I try to boost hard so the gauge slow 1 bar(around 14psi) and it reduce quickly then I try again I heard a big sound like back fire sound or blow up sound then my car no boost ,no power .So any guys know what happened with my car?should I replace the turbo charger?and if i change it what parts i need to get with .Like turbo gasket????pipe ect???and also i just change the first turbo charger or both??please help

You probably just blew a coupler.

Does your boost gauge also have a vacuum section (basically the somewhat negative section below 0 boost)?

If so, what is your vacuum reading at idle and what is your idle rpm?

the vacuum is 20 to 21 at 750 idle rpm

thank you rynberg
 

i fixed my turbo due to intercooler hose drop off