1999 Pontiac Grand Am 4 cyl Two Wheel Drive Automatic 150000 miles
Car is running on 2 cylinders. I removed the assembly of the coils and ignition module and turned it upside down. Installed normal wires from the this assembly down to the plugs. Started the car and used a timing light to determine that the first and last cylinders are not firing and that the car is running on the 2 center cylinders. Used an ohm meter to determine that both cylinders that are not firing were going to the same coil. Assumed the coil was bad and replaced it. No help. Swapped the location of the 2 coils and still the same cylinders don't fire. Installed a new ignition module, still the same problem. I have checked the wiring harness that conects the ingnition module to the coils with an ohm meter, it seems OK, all circuits read about 0.2 ohms. I checked the resistance of the individual plug circuits inside that white plastic cover that the coils mount in. Each read about 1.2 ohms. I am at a loss.
have the same problem?
Sunday, February 21st, 2010 AT 2:21 PM