I have noticed that lately I need to crank the starter longer than in the past before the motor fires. I have changed the plugs, rotor, cap, air filter and gas filter in the last eight months, but not the wires. I tested the wire that runs between the coil and the distributor cap today and it showed 2.2 k ohms. Should I replace the wires? My car is a 1997 850 T5 wagon.

Thanks again.

The ignition wire should have been part of the set. What seems to happen is changing some of the ignition system has an overall effect, since they aged together they have kinda learned to live with each other. When I changed wires, I had some starting trouble. Luckily I have another volvo with the same coil and did a swap just to see, and it cured the problem.

How old is the coil? It may need to be replaced too. It's a good idea to have the whole ignition system at the same newness level, like changing both rad hoses, or both headlamp bulbs. Then you have a better feeling that you're fine for a long while.

tried cleaning the throtle body?
tried a dose of injector cleaner?

but if the HT cables are over about 5 yo change em anyway!

I agree...ignition wires could make a difference. Starter could also be going south.
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1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon. My cars have been running so well lately they've got me worried.

reading it again battery could also be an issue (check the voltages!)