Hello, 1991 164L has been sitting for 5 years, I have been doing maintenance while working through various issues including replacing ecu and relay with diode. Today's question is: fuel pump powers on when ignition key is turned to on and holds 45 psi but once I hit ignition to fire motor the power to the pump shuts down. I've also replaced the fuel pump rely using a 87 87 not a 87a 87. Could the error be within that rely. My self test shows 4, 4 times so no issues coming from there. Presently we have cutout the power from the rely to the pump and are direct connecting to battery with toggle switch and fuse to pump and it runs great but I'm getting tired of remembering to switch pump off when shutting car down. Thank you for help with this issue happy to have a forum like this to use.