Date: Mon, 08 Sep 1997 12:22:03 -0300 From: "Bruce J. Howes KG2IC" <bhowesnopsamnet.net> Subject: Re: stalling '86 9000T
Prefered Customer wrote: > My 1986 9000 Turbo stalls, not every time, when you let off the > throttle > suddenly when the turbo is spooled up, normally when in stop and go > traffic. This problem has persisted for a couple of years and doesn't > seem > to be anything except boring. Anyone have suggestions? A couple of things to check. First, the turbo bypass valve, also know as the "hooter valve". This is quite easy to check with a hand-held vaccum pump. A leaking or otherwise defective valve will cause the problem which describe. This is the most likely culprit. As always, check for vaccum leaks, very common on the older cars, esp. the turbos. Vaccum lines cracked, and sometimes become hardened so they do not seal well on the vaccum fittings. We use a silcone type of vaccum line in our shop that was made for BMWs, but works great with the SAABs. It stays flexaible and does not harden or crack even after years of heat. You might want to check with the local BMW dealer about this. The ISC motor is always suspect, although this is typically a "steady-state" failure and should not be an issue just when the turbo is boosting. Good luck! -- 73, Bruce KG2IC \\"""// (o o) +---------------------oOO--(_)--OOo--------------------------+ : Bruce J. Howes KG2IC email: kg2icnopsamt.org : : AMSAT-NA Area Coordinator web: www.buffnet.net\~bhowes : : ARMY MARS AAR2AJ fax: (716) 689-2880 : +---------------------.oooO---Oooo.--------------------------+ ( ) ( ) \ ( ) / \ _) ( _/
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