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Date: Mon, 29 Mar 1999 20:14:19 -0600
From: "William T. Brown III" <Ra137nopsamamp.Net>
Subject: Re: turbo boost unstable question...

There's one way to see if the turbo is going. In the front, there's a vacuum line coming off the turbo, going up to a sensor of some sort. Take the hose off, and then drive. See if it gets FULL boost, and the engine should cutout. When the turbo sensor reads too much boost, it kills the ignition. For this experiment, you WANT it to occur. If it doesn't, you MIGHT have a faulty turbo. Ask your mechanic to check the turbo for oil, and excessive play. Oh, and remember to put the vacuum hose back in place! If you want to get creative, I have a solution I tried. I got 2 long vacuum hoses, one running from the turbo, and one running from the sensor (or is it the waste gate, not sure). I then ran them pass the firewall, into the dash. I used the empty switch slot, and inserted a valve. With it I can dial in my boost. It's definitely a summer project, if you're patient enough. Good luck. Wills '84 900T '89 900T '92 9000CD '99 9-3 "ben.g" wrote: > > hi group, > > i'm having some trouble with my 88' 900t 16v. > i bought it just a few month ago, and from the beginning > on, the turbo needle would never even get close to the > red...2/3 aprox. at best. i also had the feeling the car would > be missing some bite, when accelerating hard... > > so i thought some base boost adjustment should do the > job, but somehow the result of this is poor: > sometimes, only when car is _really_ warmed up the needle > hits the red or goes even into it, but it seems to depend on > how i hit the gas, and at what speed. all in all the boost seems > very unstable, and i also experienced strange changes in gas mileage, > which seem to have no relation to speed or way of driving... > > now i'm afraid the turbo is simply passing away... > (the car now has 244k km, which is about 153k miles.) > am i right, or could it be something else...?! > > ThanX > ben -- William T. Brown III

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