I'm not sure what octane I should be using in my S 80 2.9? since the weather has turned hot my check engine light intermediate comes on. I have a 1999 S 80 2.9 that I inherited 6 months ago. it's been in my shop and I worked on it when I had the time. I pretty much rebuilt car from ground up. the pa...

My 1999 S 80 2.9...awesome car. I was given this car by inheritance, no one wanted it. the car had set several years without being driven.closets volvo dealership several hundred miles away. I personally have never at the time owned a volvo, driven one or even rode in a volvo. I knew absolutely noth...

Check voltage at your spark plug coils. One side of coil should have 12v. OR pull spark plug and lay on engine connected to coil and watch for spark while cranking engine, should see spark plug firing ,run compression test on all cylinders,wet and dry test, then you know if internal working of engin...

I tried this way to check why my cel had just come on a few days ago on my S 80 2.9. I tried several times and get nothing showing up in my display except what should be there, average mph. Average speed, fuel milage 23. ,mpg. Etc... Nothing about the DTC or anything different. The car is running gr...

I have a 2000 S 80 2.9 i inherited a few months ago. IT WAS in bad need of a lot of different repairs. I have taken the challenge to do all needed repairs myself being a machanical engineer and master tech. close to 40 years, but at the time i knew nothing about Volvo had never worked on Volvo had n...