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Advice needed! (SuddenEngineStumbleDeath)! Posted by kenS [Email]  (#606) [Profile/Gallery]
(more from kenS) on Tue, 7 Dec 2004 08:53:34
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here's a description, and advice or suggestions appreciated!
'87 900T, 175K, car has been running flawlessly, last tuneup (plugs, rotor, etc.) was about 10K ago). Yesterday it starts up fine (as usual), 20 min drive to work, it warms up to temp in 10 min or so (outside temp was 45 deg or so, not cold), everything normal. Then, 15 min into the drive, in 20-30mph traffic it starts stumbling and bucking, no power, but it doesn't stall. I pull over, thinking I'm going to be stuck, then it evens out. Pull back into traffic, it stumbles a few times, but then evens out. That evening, on same 20 min drive home, works fine, no stumble. I checked all of the connections and hoses, nothing loose or frayed. This morning, the same thing happened, at almost exactly the same time, about 15 min into the drive. This time I watched the gauges--- the tachometer signal seemed to be dropping out while it stumbled, but fuel pressure (yeah, I have a cabin FP gauge) was stable and O2 sensor (yeah, I have a narrow band AR gauge) kept sweeping. Engine never stalled, just bucked and had no power when you gave it gas, also a few small pops from the exhaust. I turned it off, sat a few minutes, then started it up again. It stumbled and bucked for a minute, then evened out and got me to work. So, any ideas where to start? Is the tach dropping to zero during the stumble the major clue? I did check the distributor hall sensor cable, and while the connector is old and brittle, it is intact.
posted by 196.3.4...
, Tue, 7 Dec 2004 08:53:34 <-- Viewing This Message, Tue, 7 Dec 2004 17:43:10
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