1995 Honda Civic erractic idle/runs rich

1995 HONDA CIVIC
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DIESEL718
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Engine Performance problem
1995 Honda Civic 4 cyl Front Wheel Drive Manual

my civic runs good but a little rich at start up but when it warms up, the idle goes up and down and when i stop sometimes it sounds like it wants to shut off.at the same time its running extremely rich. could the IAC be the problem or maybe timing?
Jul 27, 2009 at 7:09 PM
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RASMATAZ
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Could be the IAC and the following below

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
Jul 27, 2009 at 8:18 PM