kcelectronics

Yes, why the Pressure Regulator? have you checked the Fuel Pressure?

Hi Again, its just condensation, HOT moist exhaust and COLD air = "Steam" just like a Jet at high altitude OK Colin :rambo:

When the engine is OFF there is zero oil pressure the switch is closed and the wire is grounded, while the engine is being started the fuel pump is activated by the ignition switch, and after the engine starts the oil pressure comes up and opens the oil pressure switch, this keeps the fuel pump running, (along with the voltage from the alternator) if the engine cuts out the pump will keep running till the oil pressure drops to zero (only a few seconds) and the pump will stop! This is to over come the safety issue that would arise if the car was in an accident and the ignition was still ON but without the engine running if the fuel line was damaged the pump would empty the tank very quickly causing a dangerous situation. Hope this explains the Oil Press switch issue? Colin

This switch stops the fue pump when the oil pressure falls to a low level (IE engine stops) or the switch is faulty and grounds the wire (same as no oil pressure) so if this wire is pulled the pump will continue to run, (I am working from memoru here) Colin :rambo:

Hi I have only just read the end of this post, does the fuel pump keep running when the engine cuts out? Does the pump relay rely on the oil pressure switch to keep it the pump running? Colin :rambo: