I have seen several posts asking about hesitation at highway speeds where it feels like the engine skips a beat or does not fire for part of a cycle. I had this problem and fixed it by disconnecting the battery, getting access to the large connector to the car's computer (near passenger feet just ahead of the front passenger door), and using PB blaster and a toothbrush to give the pins and connectors a good cleaning. This worked for me and I'd like to pass it along as this board has helped me many times.

Can someone post this for me?

Thank you,

91 Volvo owner