I have a 2002 Chevy Venture with 3.4 that has no spark. It also has no codes. With the scan tool I can see the 7x and 24x crank sensors generating a signal. I have checked power and ground to theignition module. Checked for a/c voltage while cranking from both crank sensors and the cam sensor.I have also voltage dropped all the powers, grounds, 12volt and 5volt refernece cicuits,to and from the ignition module and pcm. I have also tried new coils and ignition module. Any input would be greatly appreciated. Thanks, John

Just to let everyone know the truck had a damaged tone wheel on the crankshaft due to internal engine problems. I remove the entire ignition system and hooked it up on the bench and made it fire. At that point I removed th oil pan and found damage to the ring where #1 is. Installing an engine is more than the truck is worth! To the junkyard it goes!!!!!