Reply To: GT250 EFI DSpec Stalls at Idle after Warm Up
Att: Marcel,
No need to apologize. I guess I panicked. The decision to approve each message sent is commendable. Thank you for this service.
Att: Sam,
The decision to close the plates completely at idling makes sense to me since this allows the ECU to set airflow based solely on the ISC solenoid. If your idling speed is not stabilising yo may want to investigate the movements of the ISC.
Here is a photo a jig I set up to view the movements of the ISC. The reason this is needed is because since air intake at idling is not restricted the ECU will attempt to push out the ISC piston in an attempt to reduce airflow and therefore engine idling speed.
Whilst experimenting I also noted that my fuel injector number 2 had some small black particles lodged at the bottom end which is of course not good and may lead to misfiring. This led me to the fuel pump a picture of which is shown below. When I removed the pump from the tank I emptied the remaining fuel from inside its pipe into a very clean cup and indeed similar particles settled at the bottom of the container. Inspecting the fuel filter attached to the pump showed that the “fine gauze” enclosing the contents was intact. The filter seems to contain some black stuff inside and it appears to be leaking into the pump and then on to the injectors. See picture below of my pump. The question I would like to pose is:
1. can the fuel filter be replaced on its own? Replacing the whole pump is costly.
2. Can I add an inline filter between the pump and the injectors? I was advised that the small ones readily available would not handle the pump pressure. The ones I could find are quite large intended for use in Motor vehicles.
Suggestions for a solution are most welcome.
Regards
joe