Date: Sat, 22 Sep 2007 18:06:29 GMT
From: Doug Schwarz <>
Subject: Re: Intermittent engine vibration

In article <>, "Jim M" <> wrote: > >> Doug Schwarz wrote: > > > Any other thoughts, anyone? > > > Have you checked the inside of the distributor cap to see if it's clean. > Many of the non-turbo's (including my 1995 900S) have a leaky distributor > shaft seal. Mine's done it for years. It's only a little oil that gets by, > but every a few months it accumulates and I notice the idle is less smooth > and it's more difficult to start off from a stop(5sp-M/T). Lately I just > pull and clean the cap at every oil change (3k miles) and that works fine. > > Jim Jim, Thanks for the suggestion. As it so happens I have just come in from having done exactly that! Yes, there was some oil in there, but not very much. I cleaned it up and took a short test drive, but the vibration was still present. I visually inspected all the HT wires and they look to be in quite good shape. I'll have to look at the service records to see when they were last replaced. I realize that you can't tell if they're faulty just by looking at the outside, but if they're new they're most likely okay. In general, the vibration seems to be less frequent over the last couple of days so I may have no choice but to wait until it gets worse. I don't actually drive much (often less than 100 miles per week) so that may take a while. -- Doug Schwarz dmschwarz&ieee,org Make obvious changes to get real email address.

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