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  #1  
Old 5th October 2010
hessdf hessdf is offline
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Question Turbo vacuum diagram

Does anyone have a diagram of the vacuum lines for an 85 16V Turbo. Mainly interested in the waste gate area and the intake manifold. Turbo is bogging down under heavy throttle.
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  #2  
Old 5th October 2010
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Default Photos of vacuum lines on 85 SPG

The orange hoses are the vacuum lines on this 85 SPG







Jon1
jon...
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  #3  
Old 5th October 2010
Racerquinny93 Racerquinny93 is offline
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cool, now is it different for a 93 900 coMED 2.0L turbo engine??????
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Old 6th October 2010
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Originally Posted by Racerquinny93 View Post
cool, now is it different for a 93 900 coMED 2.0L turbo engine??????
No, they're both c900 T16s.
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  #5  
Old 6th October 2010
hessdf hessdf is offline
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Smile

Thanks so much. I think i already see a problem. My vacuum hose coming from the nipple on the intake manifold is going to the FPR, and the picture shows it going to the top of the area with the SAAB cover plate. Could you show me where the FPR hose goes? Thanks
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Old 6th October 2010
Racerquinny93 Racerquinny93 is offline
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mines a little different


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Old 6th October 2010
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Originally Posted by Racerquinny93 View Post
mines a little different
Doesn't really matter as long as it's from the plenum chamber and is pressurised on boost.
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Old 6th October 2010
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I have sent some pictures of mine. As you can see in #1 the hos has been capped near the oil cap. #2 shows hose coming from throttle body to a canister on driver side fender.#3 is hose going from intake to FPR. # 4 is unused and looks to small to accept a hose. HELP. Had to pit this on forum because I can not figure out how to attatch photos to private message.
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  #9  
Old 6th October 2010
hessdf hessdf is offline
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Question

Has #4 been broken and someone re-routed hoses?
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Old 13th October 2010
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Quote:
Originally Posted by hessdf View Post
Has #4 been broken and someone re-routed hoses?
Looks like you are missing a vacuum line there.

In the second pic that Jon1 posted, you can see there is a vacuum line that connects to the inlet on the valvle cover back to the intake manifold, with a check valve (the white thing) in the line. The check valve is there to prevent the crankcase becoming pressurised when you're boosting.

However, assuming you don't have a vacuum leak on the inlet side, not sure how this would impact boost for you. Wiser heads on the forum may know.
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Old 13th October 2010
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I have ordered a new nipple, grommet and check valve and will run that hose, and then take the hose from the FPR and run it to the vacuum port on the other side of the intake maniflod near the break booster. Sound right?
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  #12  
Old 13th October 2010
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Quote:
Originally Posted by hessdf View Post
I have ordered a new nipple, grommet and check valve and will run that hose, and then take the hose from the FPR and run it to the vacuum port on the other side of the intake maniflod near the break booster. Sound right?
Yep - sounds good. On mine, I'm running a vacuum line from the side of the manifold, next to the brake booster, across to a T that splits it to the FPR on one side, and the check valve and valve cover nipple/hose connection on the other.

Make sure you get the check valve around the right way. You should be able to suck air through from the manifold side, but not blow - if that makes sense.

Good luck
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  #13  
Old 13th October 2010
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Great. Will take care of this weekend. Yes the explanation of the check valve made sense to me. Just about have the old 85 running great. Will post some pictures soon. Only have about $1600.00 invested so far. Need to have both front seats reskinned and thats about it.
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