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      03-22-2017, 11:24 PM   #1
ahewitt
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No boost + No charge piping blown off?????

Last Friday I was driving to drop off my supervisor at a bar, on my way home K realized the car (after a few days of gnarly wastegate rattle) refused to spool boost, nothing over 5 pounds was the highest I've gotten it.
I had sent logs over to Jon at BMS, with no luck besides him saying there's most likely a blown off charge pipe.
Took the whole front end apart and the whole charge piping/ intercooler is just fine.
Any ideas on where to look/ start next?
Thanks!
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      03-23-2017, 01:18 AM   #2
dsocold
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yes check the vacuum lines going from the canister to the diverter valves on the pasenger side of the engine. mine had the most smallest leak and i was getting no boost
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      03-23-2017, 01:34 AM   #3
ahewitt
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Quote:
Originally Posted by dsocold View Post
yes check the vacuum lines going from the canister to the diverter valves on the pasenger side of the engine. mine had the most smallest leak and i was getting no boost
How did you check for Small leaks? they look perfectly fine this is killing me, going from FBO 135 to a friends stock Miata is rough haha!
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      03-23-2017, 01:59 AM   #4
dsocold
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Quote:
Originally Posted by ahewitt View Post
Quote:
Originally Posted by dsocold View Post
yes check the vacuum lines going from the canister to the diverter valves on the pasenger side of the engine. mine had the most smallest leak and i was getting no boost
How did you check for Small leaks? they look perfectly fine this is killing me, going from FBO 135 to a friends stock Miata is rough haha!
sorry meant to say boost selenoid not diverter valves silly me heres a pic for reference ignore the cap it off part just found this pic off google..

the vacuum hoses attatch onto it start the car and put your finger around it and feel for leaking air gushing out
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      03-23-2017, 02:07 AM   #5
ahewitt
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Quote:
Originally Posted by dsocold View Post
sorry meant to say boost selenoid not diverter valves silly me heres a pic for reference ignore the cap it off part just found this pic off google..

the vacuum hoses attatch onto it start the car and put your finger around it and feel for leaking air gushing out
Got it. And if air is not leaking out then that's my issue correct?
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      03-23-2017, 02:24 AM   #6
dsocold
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no its supposed to not have air leaking out . if you feel any air leaking thats whats causing the lack of boost
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      03-23-2017, 02:28 AM   #7
dsocold
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when air is leaking the car will stop boosting from even the most minor leak so make sure the vacuum lines are plugged in to thise 2 metal thin shaped pipes and feel the rest of the lines to make sure its not leaking anywhere
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      03-23-2017, 02:43 AM   #8
ahewitt
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Quote:
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when air is leaking the car will stop boosting from even the most minor leak so make sure the vacuum lines are plugged in to thise 2 metal thin shaped pipes and feel the rest of the lines to make sure its not leaking anywhere
Just so I'm clear the line of the nipples should be leaking?
And do I unplug both or one at a time?
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      03-23-2017, 02:55 AM   #9
dsocold
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if they are functioning correctly they should not be leaking at all. and the vacuum line should be plugged in on both of them, mine was leaking air right at the metal nipple where the vacuum line plugs into. also keep in mind we are worried more about the vacuum lines bot the selenoid itself if you unplug the vacuum line the selenoid will be sucking air in, u can cap them off would be a quick way to see if thats the problem to begin with as it keeps the wastegate fully closed
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      03-23-2017, 02:57 AM   #10
ahewitt
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if they are functioning correctly they should not be leaking at all. and the vacuum line should be plugged in on both of them, mine was leaking air right at the metal nipple where the vacuum line plugs into
Got it! Sorry been a long day haha!
I'll test this out first thing tomorrow seems like the most easily accessible test.
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      03-23-2017, 02:59 AM   #11
dsocold
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and mine wasnt throwing any codes but i was just getting no boost sometimes only like 1-3 psi then nothing
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      03-23-2017, 11:05 PM   #12
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The turbo wastegates are vacuum actuated, so if there's a leak in the solenoid, lines, or accumulator, you won't be boosting...

ianc
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