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Hi there,
My Volvo will jerk from time to time when I accelerate while the AC is on (I just changed the coil and spark plugs).
Does anyone have any idea about it?
Thanks.
You could start by check for basic things like air leaks, the next step is to carry out a diagnostic scan to check the operation of the engine management components like the air flow meter and electric throttle flap.
Sometime with these vehicle's its a good idea to visit a Volvo specialist who has test components they can try out.