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1994 Volvo 940 Turbo difficult to start when cold. Unplugging air mass meter let’s it’s start 900 1994

posted by  machine man on  Sun Jan 29 09:41 CST 2023
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last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

Hi,

That seems to be a logical move because if the ECU doesn’t know you want to idle or power to drive away it’s liable to do what ever it thinks it should do with the incoming RPM signal.

Something similar has to happen with the unplugged or missing pins in the AMM.
I guess limp mode is meant to keep you from being stranded but not as frustrated like a Throttle Position Sensor, a sticky Idle Air Control or really twisted as a half broken Crankshaft Position Sensor can.

At least you are finding something to keep us waiting in our armchairs for a resolution, so I will keep only one leg up on a my hassock. 🤫

Phil






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