so you just left the wire on the plug side hanging correct?
Do you have the Lethal budget kit? Just wire the relays up like I have them in my diagram above. Add a switch in there to if you'd like...
so you just left the wire on the plug side hanging correct?
yes, thats the way i did mine from malcolms instructions.. you can do the switch like he shows to test the pumps and set pressures or i just grounded the relays with my test light to run the pumps. it was to late to get a switch and i wanted to check for leaks.. Thanks again to malcolm for the post
I was told to set it at 40psi with engine off and with engine running it should be around 35 psi.. Ill know when i get the tune, waiting on that to still come.
So what needs to be changed in the tune? Not sure if i missed it?? I wired my walbo 400's pump up this way and right now I get surging fuel pressure(20-50#). Goes away as soon as i toggle the ground switch.
will this setup stop the pumps if you get into an accident?
Yes it's much more than just turning off codes. You actually change quite a few settings in the tune but I'm sure your tuner knows this or he wouldn't be tuning cars for a living.
So if you turn your key on do the fuel pumps prime like stock and then turn off? If you flip the switch do they come on constantly and stay on as long as the key is on?
Also try and take a digital volt meter and see if you have a steady 12 volts at the relay when the car is running with the toggle switch flipped. Then turn off the toggle switch and see if you still get a steady 12 volts on the relay or not.
Anyone running a check valve with this return setup? Just curious as I have got my Power wire from the fuse block, the signal pin as bn/pk from fpdm plug, halfed the bn/pk for the other side of the relay. then grounded the relay to the chassis and the pumps still prime but the thing is i dont have any fuel pressure until i cycle it around 5 times but it wont hold.
BTW i just read that RD/Bk was a positive and BN/PK is negative and then i read another thread it was just the opposite
No check valve required. The fuel pressure regulator works as one and holds pressure. You should not have to cycle your key 5 times. Just a single turn of the key will have enough pressure. Just like OEM. How do your fuel lines route?
BN/PK is pin 10 which is positive.
Ive done alot more reading and you are correct, BN/PK is positive, Fuel line is routed next to the stock fuel line which is now my return