2000 Oldsmobile Achieva

Electrical problem
2000 Oldsmobile Achieva 4 cyl Four Wheel Drive Automatic 700000 miles

I was with my Friend deciding if it would be wise to buy a certian car. I was listening to the engine while it was running and it appeared that the engine may have a misfire. My friend and I both decide that if it is only an ignition problem, my friend would buy the car.

Could you help explain in detail some simple testing I can do to find out if the problem causing the miss is more serious ( Bad piston, Bad valve etc.) The only tools that were given to me are a screwdriver, pliers, and a test light.
June 18, 2010.

Get a compression gauge and do an engine compression check both wet and dry tests to determine the engine condition this is your starting point

Jun 18, 2010.