Z31 Fuel Pump Relay Mod -D.I.Y- 

U should have more subs I never see a youtuber with a z31 you are unique and that's why I will try my best to get u as many subs as possible

The car is fukin sweet, I'm picking up a clean non turbo 87 Saturday but maybe I'll find a turbo part car to swap over

I’m glad to see someone that appreciates the Z31. I worked at a couple Nissan dealers when they were new and have had 5 Z31s myself. Still have 2. My black 86 Turbo car I upgraded when it was new with a Calloway piggy back system. Caveman tech compared with today’s availability. They’re great cars and under appreciated in my opinion. They were certainly ahead of their time when they were new. One of the most fun cars to drive I’ve ever owned and I’m 53 now and have owned nearly 80 cars over the years that I actually drove for a period of time. Maybe I’m biased but I’ve driven many cars and worked on many more. The Z31 is still one of my all time favorite cars to own and drive. Nice job with the channel!

Dem Watanabe wheels😍

Is it just me or did your diagram and sequence of events at the end get swapped for the 3 and 5 positions on the relay? Diagram says a positive direct from the battery and through the firewall goes to the #5 slot but then later you say it goes to the #3 slot. Or does the part not matter?

Did you do it cause you weren’t getting power to the pump or just cause ?

and is that the original fuel pump relay your using, or did you get another one and leave the other plugged in?

That would be a big help for me if you can tell me thank you I like your video I'm having problems with the relay my wiring on my z31 also

Hey bud, what gauge wire did you use? my walbro 255 comes on sometimes, crossing fingers i didn't burn out my ECU, but i figure i better do this relay befoer it does

what gauge wire are we using?

Will this work with z32 ? The concept?

Why would you do this mod

I also love how u explain everything with so much detail! It let's people know how to do it and why they are doing it! I'm definetly getting u more famous than tj hunt

Plus the upgrade adding the second relay allows for larger wire to supply the upgraded pump guys. You can get overheating and cause a fire potentially and destroy other parts of the wiring harness. This as he stated gives a constant power supply to the new upgraded fuel pump. It’s better for performance and it makes the car safer over all

Does anyone know the current rating of this Nissan blue relay? Also, it appears that what's being done is simply letting the ECU see the relay (electrically) as the fuel pump; energizing it only when it would otherwise be allowing power to the fuel pump (by means of grounding it). And has testing been done to see if the pump behaves normally? ... meaning, does the pump stop running after 5 or so seconds when the ignition is turned to the 'run' position without/before cranking the engine?

Long time subciber

If you are leaving the original in place (as you noted below) and adding this, what is the upgrade?

Great video. Just wanted to say that your photo shows terminals 3 and 5 being switched for the battery source and power to fuel pump. The photo says 3 is for pump and 5 is for battery, but when you show the relay in your car it’s the opposite. Confused me for a second, but just ended up doing what you showed in your car

In the description you suggest doing this mod if are upgrading the pump AND making more power. What if you're just running stock power? Is this mod necessary still?

What is your wheel tire set up... suspension and exhaust. Especially the wheels

Do you have a link to the relay?

There are two black wires which is the ECU ground don't know which one there are two black wires

I sent you a DM on IG (@ishmollies) Your assistance would be greatly appreciated man! thanks

Can any relay work as the mod? Cause I bought one from advance auto parts and has the same shape as the one in the video but they said it was for the A/C

In the beginning you say that number 5 goes to the battery and then later you say it's number 3

Yo I need help with this z31 I'm working on. Can anyone help me?

Will this fix code 22? (Fuel pump is either shorted or open)

wire colors are different for a kouki, could you tell me what colors to use?

Fucking thank you for these videos!!!

Where did u run the wire through the fire wall

Wow! I have the same exhaust tip for my z (minus the cat).

Hey, I have an 87 Z31 and one of the previous owners wired the fuel pump to a switch in a very unsafe way, I'm trying to figure out how to return mine to stock. Could help me with understanding the wiring better on a stock Z31 fuel pump?

Might be a stupid question, but are using the ignition from stock fuel relay just because it was there, or a for a reason? Can any switched 12v source work instead? Thanks

What gauge wire?

Is the relay mod necessary if Im switching to MegaSquirt Goldbox to begin with?

One other note ... since you're running the fuel pump at full voltage, it might not be a bad idea to upgrade the wire to the pump itself, from the relay that is. You have higher current gauge wire from the battery, which is all well and good (10 gauge?), but it then narrows down to a higher gauge (14?) after the relay to the pump itself (stock wiring). Is there a preferred method to getting higher current wire from the relay to the pump? ... going through the fuel pump's tank cover?

What are the benefits of this mod and what relay is it

Do you leave the stock relay in the original spot and buy another relay to do this also the power wire coming from the pump to the relay does that have to be wired directly to the pump ?