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1991 940 idle issue 900 1991

uid 27's pic
posted by  Art Benstein on  Wed Jan 23 07:57 CST 2019
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Hi Owen,

You've described the exact behavior of our LH2.4 cars when they lack a signal from the speed sensor which drives the speedometer and ABS (if equipped) electronics. The on board diagnostics verifies this by posting a DTC (diagnostic trouble code) of 311.

This VSS (vehicle speed signal) needs to come from the speedometer to the fuel computer, so if your speedometer is working OK, the problem will be in the circuit wiring, most likely at the back of the instrument cluster.
--
Art Benstein near Baltimore

Ever stop to think and forget to start again?






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New 1991 940 idle issue
posted by  OwenF  on Wed Jan 23 06:29 CST 2019 >


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