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Old 04-13-2010, 09:58 PM   #1
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ok.. heres a good one..

so i was going to pass a mustang earlier today.. dropped 3rd gear cuz he started to speed up when i went passed him and the lane was changing.. car boosted fine.. all good then suddenly.. no boost.. so my thoughts.. i blew off a line... so get to my destination and check all the lines and nothings popped off nothing is loose.. so i take my car home.. this whole time that car is running fine just no boost... starts right away runs great.. just no boost... so i get it home and do a pressure test on all my intercooler piping from turbo charge pipe to tb pipe.. hmmm no leaks... tried to do it from the inlet of the turbo but it just bubbles through the return line.. always has (i think)... so i take apart my bov.. notice that the o ring has slipped off.. so i fix it and take it out to test it... nope no boost... so then i check every vacuum line by plugging one side and putting vacuum to it.. all holds good.. (now if i put vacuum on just one side of any vacuum line and dont disconnect the other side so it runs through my intake and engine or what ever it runs through it doesnt hold the vacuum) is that normal? but so i continue searching.. take of my wg and take it apart.. nope all good there.. no leaks and seems to be actuating when put under vacuum.... after all this i took it back out and still no boost.. so i turn off the bc and still no boost... any ideas? im stumped why would it suddenly have no boost and run just fine? if the turbo seals were bad wouldnt it smoke all the time? im out of ideas... what could it be?


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Old 04-13-2010, 10:03 PM   #2
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Check the turbo seems like it locked up and is touching the housing :(
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Old 04-13-2010, 10:04 PM   #3
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or wastegate stuck open
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Old 04-13-2010, 10:05 PM   #4
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checked both... sorry forgot to metion that.. turbo spins by hand as well as when car is running.. and wastgate is not stuck open.. checked that too..
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Old 04-13-2010, 10:06 PM   #5
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And the car idles fine?

I would check all boost piping again and make sure there are no holes in the couplers
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Old 04-13-2010, 10:08 PM   #6
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yep idles perfect.. checked it 3 times.. it holds 30psi for over 5 mins.. then i figured that was good enough to know thats not the prob..
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Old 04-13-2010, 10:10 PM   #7
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what's your timing at during these WOT pulls?
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Old 04-13-2010, 10:10 PM   #8
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now i do get a lot of smoke when i first start the car if its been sitting for a bit... sometimes.. i was blaming that on the 116 race fuel i put in it last friday.. (5 gallons mixed in)... but it goes away shortly and doesnt come back... and it doesnt always smoke.. just seems to be when it wants to.. but only once per time it chooses too.. smokes then goes away and doesnt come back unless i shut off the car and again its only sometimes..
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Old 04-13-2010, 10:12 PM   #9
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Quote:
Originally Posted by mikealicious View Post
what's your timing at during these WOT pulls?
i have no idea.. j&s isnt doing anything and if timing was off wouldnt it run bad? it runs like a non boosted car.. and my boost gauge reads 0 in wot.. and 20 vac under idle.. pulls just fine under wot just not nearly as powerfull as before..
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Old 04-13-2010, 10:15 PM   #10
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out of ideas for the night ill check back in the a.m.
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