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93 940 rough idle 900 1993

posted by  Big Harry on  Sat Dec 9 09:38 CST 2006
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last visit: Sun Sep 21 11:06 CST 2014
[RELATED]

Just an update on the intermittent rough idle on the 940. I have to date checked the fuel pressure (43.5psi and a twenty minute bleed down), replaced the air temp sensor, map sensor, ECT, cleaned throttle body and IAC, replaced spark plugs, distributor cap and rotor, and run both the Regina system diagnostics and the Rex diagnostics; both of which returned 1-1-1 codes.

When the car reaches operating temperature it immediately starts the rough idling which gets progressively worse as it is driven. Does anyone know exactly what happens in the ECU when the engine comes to temperature? I am using the Volvo Service manual TP 31903/1 on Fault Tracing the Regina fuel system.

I almost believe that I am looking in the wrong place and that it may not be fuel or ignition related.

Regards,

--
Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles






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New 93 940 rough idle [900][1993]
posted by  Big Harry  on Sat Dec 9 09:38 CST 2006 >


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