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Rough running 740, catalytic converter getting red hot 700 1990

uid 18083's pic
posted by  lucid on  Sun Jun 27 11:29 CST 2010
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

I think a slipped or mis-timed (retarded) belt can cause the hot cat. Worth checking basic timing anyhow on an unknown car.

Also, since you didn't say this was a turbo, I assume it's got Regina (Siemens-Bendix) FI which takes a special O2 sensor. If yours has red, white, and black wires it's the correct one. If not it will run rich.

--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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