Dear muskox37,
Hope you're well and stay so. Did anyone check the Idle Air Control Valve to ascertain whether or not it worked at all, and - if it did work - whether it had been cleaned?
Further has the fuel supply - from in-tank pump to pressure regulator - been checked? Has the fuel filter been changed?
I'd not have allowed a non-Volvo shop to do "fundamental" work on a 940. While an engine re-builder is likely to get everything right as to an engine, a general mechanic can easily miss things.
Hope this helps.
Yours faithfully,
Spook
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