Tial wastegate pulling vacuum???????
03-03-2006, 05:36 PM
#1
Member
Thread Starter
Tial wastegate pulling vacuum???????
Just finished the turbo install on my car everything seems to be working properly but for some reason the top fittin on my wastegate(the one on the top of the hat) is pulling vacuum while the car is on. the lower fitting( on the side of the wastegate) is hooked up to a good manifold pressure source. Its causing the car to idle kinda funny unless i put a cap over it which obviously shouldnt be necessary. Im also driving on a basemap until i tune it tomorrow and it seems to build boost just fine( i dont stay in it due to that fact its not tuned yet) Granted ive bene outta the game for a little while but has anyone else seen this happen? what going wrong here? thanks in advance.
03-04-2006, 06:56 AM
#5
Honda-Tech Member
Re: (99B16Si)
thats because you have it hooked up to the wrong source, you dont want to "vacum" your wastegate, you only want to boost your WG. so therefore you should hook the bottom port of the WG to the compressor housing. there is no vacum there, only boost.
03-04-2006, 07:09 AM
#6
Member
Re: (Dturbocivic)
That's not it at all. A WG will work fine on a boost/vacuum (manifold) source.
The side port and the top port are physically seperated by the diaphram. If you are getting vacuum in the top port, then the only explanation is that the diaphram is not sealed.
If you have the SSAC wastegate and you were embarrased to say, know that this is pretty common. It is a good idea to dissasemble and reassemble a SSAC wastegate because they often misalign the diaphram. Child labor, you know. It is easy enough to do. Clamp the WG carefully in a vise, and remove all of the cap screws. Remove the cap and spring, and then inspect the diaphram. If it is just misaligned, realign it so that it will not leak, then reinstall the spring, reclamp, and put the cap screws back in. If the diaphram is ripped, though, the WG will not work, and you will need a new diaphram.
The side port and the top port are physically seperated by the diaphram. If you are getting vacuum in the top port, then the only explanation is that the diaphram is not sealed.
If you have the SSAC wastegate and you were embarrased to say, know that this is pretty common. It is a good idea to dissasemble and reassemble a SSAC wastegate because they often misalign the diaphram. Child labor, you know. It is easy enough to do. Clamp the WG carefully in a vise, and remove all of the cap screws. Remove the cap and spring, and then inspect the diaphram. If it is just misaligned, realign it so that it will not leak, then reinstall the spring, reclamp, and put the cap screws back in. If the diaphram is ripped, though, the WG will not work, and you will need a new diaphram.
03-04-2006, 07:45 PM
#7
Member
Thread Starter
thanks for the advice beepy. its is a real tial wastegate. Shitty thing is i took it apart today and there was a small tear in the diaphram, kinda pissed too because it was brand new out of the box
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