(2004 Rockster. 22000+miles) so I removed coil to check it. I measured ohms and for secondary plugs it reads 7.56kOhms but for the primary plugs jumps between 0.2-0.3Ohm. It should be 7.5kOhm for secondary and 0.5Ohm for primary plugs. There are no outside cracks and it looks ok. Could this be the cause?I also checked the hall sensor . I removed it and it works. Fuel injectors are clean, they open and close when connected to battery. They are not clogged- nice stream via all four openings. Does the fuel pressure regulator fails often. Should I check it? How? New fuel and air filter installed. Valves adjusted. New stick coils. New plugs all four. New battery.