I have a 1998 Toyota 4-runner with 150k auto trans. When it was running it would surge at speed and want to die at idle. I have replaced fuel pump twice, fuel filter, fuel pressure regulator o2 sensor and finally tried another ecu. I have narrowed my problem now I think to no voltage at the fuel pump. I have checked both relays the EFI relay and the COR under the dash and both are good. I check voltage at EFI relay and get 12v at COR I only have approx. 2volts. As I read the schematic the only thing between the the two relays is the ECU so what would make the ECU draw voltage? Some sensor or what sorry if I rambled but this one is confusing to me thank you for your help
have the same problem?
Tuesday, August 21st, 2007 AT 1:41 PM