6nz boost?

Have air to to air pressure tested

 

What he said....then if it checks good, pull the turbo and check the divider in the turbo and manifold. Also check the turbine wheel....

 

Check fuel pressure and install sight glass to make sure no air in fuel it may also need to have fts fls changed has it just started this or has it been doing this for a while

 

Installing a sight glass. Tell me about this. Is it a permanent install? Where does it install? A where do you buy it? thanks

 

Check your boost sensor , it will cause the boost rise slowly

 

what he said

 

Check the gauge.

 

Slow build up of boost can be caused by a number of different things.

the wastegate actuator/diaphragm on the turbo could have a broken spring in it allowing the wastegate in the turbine housing to open at low boost pressures.

the aftercooler or the piping and hoses between the turbo and engine could have an air leak

as someone else stated the center dividers in both the manifold and turbine housing can crack and erode due to heat, this will cause slow response

another thing to look for is exhaust leaks in the exhaust manifold before the turbo. The slip joints leaking or cracks will lower exhaust gas back pressure before the turbo. This will cause slow response

 

How do you trouble shoot a boost sensor?