97 zr580efi batteryless fuel pump


New member
Oct 19, 2014
got a 97 zr580 efi batteryless and fuel pump problems. Stator ohms are all good cold and warm and fuel pump ohms at 2.0 at connector going to ecu. then at the pump connector after ecu its getting 14-17 dc volts when pulling sled over. Then when I plug the fuel pump back into connector voltage drops to 3.5 dc volts when pulling sled over and wont run pump to start sled. hook a battery directly to pump and sled runs fine at idle and throttling sled. with sled running off battery I get 17.1 steady volts at the connector for fuel pump from the ecu. would anybody possible know what my problem is or how to test to see whats going on? thank you