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Brief rough running: just old or fixable? 200 1993

posted by  jbroach on  Sat Nov 17 22:53 CST 2012
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last visit: Sun Oct 5 13:25 CST 2014
[RELATED]

R's 93 245 still starts and runs beautifully except for the first 30-90 seconds after a cold start. It never dies, but sounds and feels like it's running on 3 cylinders. Pulling fuel injector leads one at a time seems to indicate it's running equally roughly on 4, however. Hmmm, now that I think about it, pulling spark plug wires would've been smarter the way these cylinders "share" fuel, but I digress.

Any ideas on what could cause a minute of rough running without any other driveability issues? I've tried a basic tune up (wires, copper plugs, cap & rotor) and fuel injector treatments (techron) with no change. It may be the old gal's just getting old, but she did just turn in a 25 MPG run up Mt. Hood. Not bad for an AW70!

Best,
joe b.
portland, or
93 245 323k auto






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New Brief rough running: just old or fixable? [200][1993]
posted by  jbroach  on Sat Nov 17 22:53 CST 2012 >


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