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Re: turbo overboost Posted by Peter [Email] (#2804) [Profile/Gallery] (more from Peter) on Sun, 16 Jan 2005 11:14:21 In Reply to: turbo overboost, joss, Sun, 16 Jan 2005 10:56:05 Members do not see ads below this line. - Help Keep This Site Online - Signup |
You may have done this already when you replaced the BPC valve, but of not check the vac hoses.
I had similar overboost/fuel cut problems in 3-5th gear on an NG900. When the engine got to a certain rpm with the pedal down, overboost and fuel cut. Solution was the mechanic replaced a couple crumbling vacuum hoses, then removed and cleaned the BPC valve (gently) with compressed air, and the problem went away.
Bad vac hoses have been a problem on the NG900 (at least two times for me in the past) starting when the cars get 5-6 years old. I imagine the 9-3 will be no different. I plan to replace mine with silicone hoses as soon as I can get to it.
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