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Compresor Surge... WHAT

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radupanait

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Discussion starter · #1 ·
Ok I have way to much stuff for the car that im about to put on and i want to make sure that everything is good before i put it in... so i dont have to trouble shoot a billion things at once. I got my car from my mechanic a while back from my mechanic after a long process of a tranny install i got the car back and it was running like .... words cant describe. So having way to much to worry about at the moment i let it sit for about 4 months. Now i started to work on it, got it to running way better, spark plugs, mas, boost checked and probably more it just forgot, oh and a oil changed. today i drove it and not only will it not hit anything higher then 0 boost but it also makes that sequential compressor surge sound. I have a fake greddy s but when i put my crushed 1g it did the same sound, so please i hope someone has some really good ideas here i realy miss driving it. OH turbo is 16g

Thank you
 
#5 ·
You should really take the time out to fill out your profile so we are not the ones asking questions.

1. Which MBC and is it hooked up to the BOV line?

2. Do you have cams? What is your vacuum reading?
 
Discussion starter · #6 ·
No MBC or cams, vacuum reading is at 10. But its been like this for a while even before it had this problem. Today I tryed to back track through everything and put everything back to how it was, not helping much, i reset the ecu, still right now it only boosted to maybe 2 or 4 , i was boosting to at least 14 before.
 
#7 ·
radupanait said:
No MBC or cams, vacuum reading is at 10. But its been like this for a while even before it had this problem. Today I tryed to back track through everything and put everything back to how it was, not helping much, i reset the ecu, still right now it only boosted to maybe 2 or 4 , i was boosting to at least 14 before.
Click to expand...
Start with a thorough boost leak test.
 
#10 ·
radupanait said:
Very good suggestion... turbo checked no damn shaft play and it does spin pretty good, but havent checked the wastegate arm... will do that tomorow.
Click to expand...
Sure, pick the easier suggestions. Your vacuum and boost of -10 inHG and 2-4 psi all points to boost/vacuum leaks.
 
Discussion starter · #11 ·
SORRY :) i got a email saying that someone posted and it took me straight to his, all i can say is that i took all that apart (pipes and intercooler) and put it back like 3 times now checking for leeks i wish it was that easy every night, but even so with all the major parts checked, where in the would i have such big boost leeks and wouldnt i be able to hear them. could i be having a leek from the cold side of the turbo, i mean im thinking way out of the box here.
 
#12 ·
oldman said:
Sure, pick the easier suggestions. Your vacuum and boost of -10 inHG and 2-4 psi all points to boost/vacuum leaks.
Click to expand...

Sorry I just had both those situations happen to me in the past so figured id toss out the easy stuff. Im a firm believer in the "Kiss" method.
 
#13 ·
radupanait said:
SORRY :) i got a email saying that someone posted and it took me straight to his, all i can say is that i took all that apart (pipes and intercooler) and put it back like 3 times now checking for leeks i wish it was that easy every night, but even so with all the major parts checked, where in the would i have such big boost leeks and wouldnt i be able to hear them. could i be having a leek from the cold side of the turbo, i mean im thinking way out of the box here.
Click to expand...
You have obviously never done a boost leak test before or you won't be asking these questions. I will share with you my first leak test after installing a FMIC kit, tighten down every coupler and T-bolt clamps, test runs resulted in fuel cut at 18psi. I didn't know much more than you back than and resisted doing a boost leak test although I was told to do so by many, why? Same reasons as yours. When I finally gave in and hooked up a leak test, I immediately discovered most of my T-bolts were no where near tight enough, air was gushing out of 4 different couplers and about 8 other smaller leaks were discovered after fixing the huge leaks.

The quicker you fix all of your leaks, the quicker we can move on to see if the turbo has been damaged by surge caused by the lack of vacuum supplied to the BOV line.
 
#14 ·
Jp90Talon said:
Sorry I just had both those situations happen to me in the past so figured id toss out the easy stuff. Im a firm believer in the "Kiss" method.
Click to expand...
No no, I wasn't saying your suggestion was wrong. In fact, I suspect the turbo may already have suffered damages leading to 2-4 psi only.
 
#16 ·
cbnass said:
please tell me you have the nipple hose connected to the intake manifold
Click to expand...
I'm not the OP, but you're talking about the hose from the bov,right?
 
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#19 · (Edited)
I see you have compressor surg too. Did you fix it yet? If not, on you b.o.v you have two small tube, one on top and one on bottom the one on top goes to the vac (if you have a boost controler. Use a T-fitting to connect it with the vac line to b.o.v to boost controler) Then the bottom tube of the b.o.v goes in front of the throttle body tube using hose line to connect. see attachment.. hope this is what your looking for if not we can try something futher.
Image
 
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