Date: Mon, 14 Aug 2006 14:04:15 -0600
From: CMM <>
Subject: Last Chance for My '85 900

I've owned a 1985 900 (8V, non-turbo) for five years. For awhile I've had trouble with it searching (changing RPMs) at idle. I also had a leaky cold-start valve which was flooding the motor and preventing it from starting. I disconnected the wiring and that helped, but it still seemed to be leaking oil so I removed the fuel line from it. I don't know if the problem I have now is related and, if so, how. It runs rough and lacks power. It idles at about 500 RPM. When driving it has a jittery feeling like I up-shifted at too low a speed (even though I didn't). It is slow coming up to speed and I have a tough time getting over 45 MPH. What's odd is that, when the car hasn't been run and I first start it, it runs wonderfully for about 45 seconds or 2 miles before the problems start. It idles at ~750 MPH and runs well but not for long. Another thing is, with the car out of gear and the motor red-lined,it puts just a little bit of black smoke out of the tailpipe. But, about every 5 seconds, it burps a bigger cloud of black smoke. Here's what I've done: * Checked injectors (ionization is acceptable on all four) * Replaced plug wires with OEM (they were showing a bit of blue spark at ngiht) * Replaced plugs with OEM * Replaced distributor cap & rotor with OEM * Replaced fuel filter (routine maintenance) * Replaced injector seals (after checking ionization) * Replaced oxygen sensor (routine maintenance) I checked compression and it is a low on #3. Readings are: #1 -- 130 #2 -- 120 #3 -- 90 #4 -- 135 I can understand there might be a bit of sumble because of this but I don't think all the problems I'm having are related. Especially since it runs fine for a little on first being fired up. I'm ready to sell but I don't want to unless I absolutely can't get this figured out and fixed. -- Christian

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