Why does my car make no boost with the wastegate safety-wired closed?
#29
Supporting Vendor
![](/mt2011/images_td/ranks/vendor.png)
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (33)
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Makes better sense though. Check couplers for cracks, then check IC. Would be easiest to shoot compressed air into the charge system post turbo and listen for leaks. Check compession and leak down as warranted. Remove BOV.
#34
Former Vendor
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,103
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I just put 25+psi through the system, from TB to intercooler endtank, and it blew the fitting out of the TB first. (Nearly took my ******* finger off.) I'm going to figure out a way to test the hotside piping, but I'm also going to have the motor compression checked. I've been through everything but the motor itself.
#35
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Connect the cap to the turbo inlet and test the entire system at once.
FYI for others: you can make a pressure tester from junk at Home Depot for under $15.
If you have a turbo, being able to check your charge pipes for boost leaks with a compressor is essential. It should be part of basic trouble shooting for a turbo car with boost problems yet seems to be a huge mystery in the turbo Miata world. If you can't make boost you test for leaks first and THEN come to the forums. Period.
http://www.mirage-performance.com/Ec...aks/index.html
FYI for others: you can make a pressure tester from junk at Home Depot for under $15.
If you have a turbo, being able to check your charge pipes for boost leaks with a compressor is essential. It should be part of basic trouble shooting for a turbo car with boost problems yet seems to be a huge mystery in the turbo Miata world. If you can't make boost you test for leaks first and THEN come to the forums. Period.
http://www.mirage-performance.com/Ec...aks/index.html
#36
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I just put 25+psi through the system, from TB to intercooler endtank, and it blew the fitting out of the TB first. (Nearly took my ******* finger off.) I'm going to figure out a way to test the hotside piping, but I'm also going to have the motor compression checked. I've been through everything but the motor itself.
#39
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
If the system is sealed from turbo to head and you have no boost = bad wg, bad wg actuator, or bad turbo. If all is sealed then the turbo isn't spinning fast enough to make boost. You can still hear it but something could be causing it not to spin fast enough. Oil cooled only? Maybe it's coked up. Damaged bearing? Could have a bad bearing but feel tight. Process of elimination. If you verified everything from point a to point b and still have a problem then you didn't properly verify something or you have a ghost.
Maybe you floated your valves and bent all the intakes. What did the compression test show?
Maybe you floated your valves and bent all the intakes. What did the compression test show?
#40
Former Vendor
![](/mt2011/images_td/ranks/supporter1.gif)
Thread Starter
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,103
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
If the system is sealed from turbo to head and you have no boost = bad wg, bad wg actuator, or bad turbo. If all is sealed then the turbo isn't spinning fast enough to make boost. You can still hear it but something could be causing it not to spin fast enough. Oil cooled only? Maybe it's coked up. Damaged bearing? Could have a bad bearing but feel tight. Process of elimination. If you verified everything from point a to point b and still have a problem then you didn't properly verify something or you have a ghost.
Maybe you floated your valves and bent all the intakes. What did the compression test show?
Maybe you floated your valves and bent all the intakes. What did the compression test show?