Date: Tue, 25 Sep 2001 13:26:34 GMT From: "KeithG" <noonenopsaml.com> Subject: Re: 1990 Saab 9000. wheres the wastrod?
Rattling in the engine can be related to timing chain, I doubt a tappet, but it is possible (balance shaft chains in later models). If the rattling is audible while running, it could restrict power by giving a false 'knock signal'. The DI/APC system uses the sparkplugs as part of the system. Make sure that they are the right brand and type (NGK only, not a bosch or champion 'equivalent'). Make sure that they are gapped correctly. The knock sensor is screwed to the engine in the DI/APC cars as well IIRC. Probably good to get the British manual on the 9k (no US manual available) or better yet, the Saab manual and read up on the systems. Regards, KeithG "Spencer" <spencer.suttonnopsamorld.com> wrote in message news:NR3r7.2652$Ck.601916nopsam6-win.server.ntlworld.com... > there is a rattling in the engine, i think its a tappet. that would of > course restrict the APC function...if the knock sensor is in the DI casstte > how could i disable it? > <davehinznopsamcop.net> wrote in message > news:3ba8ee71$0$18899$272ea4a1nopsam.execpc.com... > > KeithG <noonenopsaml.com> pressed random keys until the following was > produced: > > > Definitely needs to be inspected and adjusted. Go to the www.saabnet.com > faq > > > on APC and boost for a good read in addition, the Townsend site has very > > > good information as well. > > > > Well, I don't know if it *definately* needs to be adjusted, just yet. > > Perhaps your APC is backing the boost off, and your turbo wastegate is > > just doing what it's told. Woudln't hurt to poke around the engine > > compartment to see if there's anything rattling - if there is, the knock > > sensor will "hear" that and think it's knock, which backs the maximum > > boost down, giving similar symptoms to what you describe. > > > > > http://216.78.172.244/turbo_folder/turbo_apc_docs.htm > > > for a primer on Turbo and APC, this site which tells how to put an APC > on a > > > brick has a good write-up. > > > http://www.users.qwest.net/~qed/volvoapc/index.html > > > > Great sites, thanks for the links. > > > > Dave Hinz > > > > > >
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