i think my wastgate stay shut?
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i think my wastgate stay shut?
try lower my boost setting, it doens't work. finally removed the vacum hose off my wastgate, figure the wastegate will open after 10lb of boost, since i have the 10psi spring. guess what?? it didn't open at all, i saw as much as 16lb before i let off the gas. does it sound like my wastgate ? or it could be something else?
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Re: i think my wastgate stay shut?
If you disconnect the hose to the wastegate, it's not going to open at all!!! Never do that!!! One time I forgot to attach the wastegate hose back and I was boosting 25 psi on pump gas. My car went from 0-90mph in about 4 sec and the engine only lasted those 4 sec as well.
Chuck Huang
Chuck Huang
Originally posted by loi
try lower my boost setting, it doens't work. finally removed the vacum hose off my wastgate, figure the wastegate will open after 10lb of boost, since i have the 10psi spring. guess what?? it didn't open at all, i saw as much as 16lb before i let off the gas. does it sound like my wastgate ? or it could be something else?
try lower my boost setting, it doens't work. finally removed the vacum hose off my wastgate, figure the wastegate will open after 10lb of boost, since i have the 10psi spring. guess what?? it didn't open at all, i saw as much as 16lb before i let off the gas. does it sound like my wastgate ? or it could be something else?
#4
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umm ya a wastegate will always stay shut if the pressure line from the the compressor side of it isnt attaced or from your boost controller. what happens is that line has a pressure in it when it builds 10 psi in it pushes that spring and diaphram down and opens the wastegate letting some exhuast bypass the turbine and flow straight into the exhaust
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there are two hoses, the one i pull is for the vacum back to the boost controller. I'm sure i pulled the right one. either way, i still see more then 10lb of boost. I'm running the hks wastegate, it has a 10lb spring. should the wastegate open after 10lb?
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Dude, he just said he has an HKS wastegate. He could be working on a Mack truck with one -they're all the same. To answer his question, yes, you should be getting spring pressure by pulling that line. Check and see if the signal line from the compressor is burned or torn. Otherwise check the wastegate diaphram.
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Re: Re: i think my wastgate stay shut?
Originally posted by rotaryextreme
If you disconnect the hose to the wastegate, it's not going to open at all!!! Never do that!!! One time I forgot to attach the wastegate hose back and I was boosting 25 psi on pump gas. My car went from 0-90mph in about 4 sec and the engine only lasted those 4 sec as well.
Chuck Huang
If you disconnect the hose to the wastegate, it's not going to open at all!!! Never do that!!! One time I forgot to attach the wastegate hose back and I was boosting 25 psi on pump gas. My car went from 0-90mph in about 4 sec and the engine only lasted those 4 sec as well.
Chuck Huang
#11
Re: i think my wastgate stay shut?
Originally posted by loi
try lower my boost setting, it doens't work. finally removed the vacum hose off my wastgate, figure the wastegate will open after 10lb of boost, since i have the 10psi spring. guess what?? it didn't open at all, i saw as much as 16lb before i let off the gas. does it sound like my wastgate ? or it could be something else?
try lower my boost setting, it doens't work. finally removed the vacum hose off my wastgate, figure the wastegate will open after 10lb of boost, since i have the 10psi spring. guess what?? it didn't open at all, i saw as much as 16lb before i let off the gas. does it sound like my wastgate ? or it could be something else?
I've seen standard ones with sticky diaphram. Usually when they are still new, wastegate line kinked/leaking, the internal wastegate spring was somehow jammed (I’ve seen it before) or some **** just somehow got stuck in there...
Do this. Connect a high pressured compressor on the wastegate hose/nipple. Blow the pressured air through it, and listen for "clicks". If you hear a "click", that means your wastegate diaphram is opening and shutting - assuming it's opened all the way. Sometimes, you can still hear the click sound, but there is no way you can tell if its opened ALL THE WAY). Your best bet is to remove the wastegate entirely from the manifold and watch it open and shut.
#12
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Originally posted by Marshall
Dude, he just said he has an HKS wastegate. He could be working on a Mack truck with one -they're all the same. To answer his question, yes, you should be getting spring pressure by pulling that line. Check and see if the signal line from the compressor is burned or torn. Otherwise check the wastegate diaphram.
Dude, he just said he has an HKS wastegate. He could be working on a Mack truck with one -they're all the same. To answer his question, yes, you should be getting spring pressure by pulling that line. Check and see if the signal line from the compressor is burned or torn. Otherwise check the wastegate diaphram.
#13
The stock FD wastegate actuator has two nipples but they both go to the same chamber.
External watsegates have two nipples, but each one goes to a different side of the diaphragm.
External watsegates have two nipples, but each one goes to a different side of the diaphragm.
#14
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My recommendation would be to pull the wastegate and test with a pressure/vacuum tester he can get at Sears or Pep Boys. Make sure you pull the wastegate off the car as this is really the best and easiest way.
It sounds like it is stuck.
regards
Rick
It sounds like it is stuck.
regards
Rick
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