update 2:
removed hose from Waste gate actuator and the car is able to produce boost nice and fast, so thats a good sign i suppose.
Slow boost production but boost isn't low
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moondogy2045
- Posts: 3
- Joined: 28 May 2011
- Year and Model: S80, 2000
- Location: California
The waste gate actuator is there to keep you from over-revving / destroying your turbocharger and/or engine. You need to re-connect it.
Now, about this hissing...I have a 1996 850 Turbo wagon. I experienced the same issues some time ago. It turned out to be multiple problems: 1) The rubber induction (air) hoses were all original and were collapsing at WOT from idle 2) I found 2 holes in the BOTTOM of 2 hoses where you cannot readily inspect them; they looked fine on top. After removing all the hoses, I was shocked to see that the walls had thinned, were gooey, and actually had holes in them.
To build boost faster, you can add a manual boost controller, but you need to be careful in using it. This YOU TUBE video is where I got my "plans": *** NOTE: YOU ARE RESPONSIBLE FOR ANY DAMAGE THIS DEVICE MAY CAUSE TO YOUR ENGINE ***
I built one from parts I bought from ACE Hardware for about $12.00 and I installed a bypass valve (that disables the boost controller) that I hid and turn on when my kids drive the car (hehehe). I set mine to allow pressure to flow through at 18 lbs. Use a 5/16" diameter ball and spring, not 1/4"...it seals much better! My entire engine setup is completely stock aside from the controller. After 6 months, I have had no problems, fuel economy is the same, but the fun factor went way up! Boost comes on strong at about 15-20 mph...before that, it is mediocre at best.
Good Luck!
Now, about this hissing...I have a 1996 850 Turbo wagon. I experienced the same issues some time ago. It turned out to be multiple problems: 1) The rubber induction (air) hoses were all original and were collapsing at WOT from idle 2) I found 2 holes in the BOTTOM of 2 hoses where you cannot readily inspect them; they looked fine on top. After removing all the hoses, I was shocked to see that the walls had thinned, were gooey, and actually had holes in them.
To build boost faster, you can add a manual boost controller, but you need to be careful in using it. This YOU TUBE video is where I got my "plans": *** NOTE: YOU ARE RESPONSIBLE FOR ANY DAMAGE THIS DEVICE MAY CAUSE TO YOUR ENGINE ***
I built one from parts I bought from ACE Hardware for about $12.00 and I installed a bypass valve (that disables the boost controller) that I hid and turn on when my kids drive the car (hehehe). I set mine to allow pressure to flow through at 18 lbs. Use a 5/16" diameter ball and spring, not 1/4"...it seals much better! My entire engine setup is completely stock aside from the controller. After 6 months, I have had no problems, fuel economy is the same, but the fun factor went way up! Boost comes on strong at about 15-20 mph...before that, it is mediocre at best.
Good Luck!
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