mran

I have engine of my 87 off in pieces due to broken connecting rod, and thought I would check if any of the injectors leak by connecting the fuel pipes to fuel rails and turning ignition key on.

However, it seems that fuel pump is not supplied with power, I assume due to having all engine sensor wires disconnected. Anyone know what sensors should be connected to meet the required conditions for ECM to turn on the fuel pump relay? Any other quick and dirty method to get power to fuel pump in this situation to check the injectors?

RWDsmoke

[QUOTE=mran;1592725897]I have engine of my 87 off in pieces due to broken connecting rod, and thought I would check if any of the injectors leak by connecting the fuel pipes to fuel rails and turning ignition key on.

However, it seems that fuel pump is not supplied with power, I assume due to having all engine sensor wires disconnected. Anyone know what sensors should be connected to meet the required conditions for ECM to turn on the fuel pump relay? Any other quick and dirty method to get power to fuel pump in this situation to check the injectors?

Unplug the fuel pump relay and jumper orange wire E to red wire A. Or jumper A to B on the oil pressure switch. Either one will run the pump until removed.

mran

thank you...was just browsing thru wiring diagrams to understand how the system works and learnt that jumping the oil pressure switch should do the trick - your comment confirmed the same. Easy as engine pulled out.

[QUOTE=RWDsmoke;1592726331]