Fuel Pressure Release
Go Street 400 installation.
I have not run the car for a while, started it up and it started first time. However, when not running there is a hissing sound from the throttle body that stops ONLY when battery cut off switch is turned off.
Is this related to the fuel pressure regulator in some way, confused because it appears to be being driven by something that requires always on power.
thanks
N
I can't see the video but I know that after you turn the ignition off the injectors will release some fuel as they release the pressure. This will make a little bit of noise. If this is the case, it is supposed to be normal.
Video was too big, so didn’t upload.
My issue is that it starts hissing when power is applied rather than after the engine turns off!
I will see for how long it stays hissing - I stopped it after 30 seconds. I will pull out my fire extinguisher and see how long it continues for !! (:
Spent some time looking at the issue again and it appears that the second the power system is live (ie the battery disconnect is disabled), the injectors are sticking open. Wouldn't this suggest some kind of short in the system somewhere or an injector getting stuck open from physical matter?
It doesn't seem to be time-limited and it doesn't appear to negatively impact the car when running which suggests that it isn't physically stuck.
I didnt install the system and havent made any changes to the wiring since buying the car, so I am flummoxed.
Thanks
Pulled the wiring apart.
When there is power into the system, regardless of whether the ignition is on or off, the ECU is sending current to the fuel pump.
The white wire from the ignition is operating properly, the blue wire is on the negative side of the coil as specc'd for a "ready to run" distributor.
The car is running a coil, distributor and Lumitron electronic ignition box, I had assumed that one could ignore the lumitron box, I am beginning to think that this may be in error.
If the issue isnt with the coil wire, the only other solution is some kind of short in the ECU/throttle body. Is this something that has been seen?
Interesting times.