How To Wire Electric Fuel Pump Relay / Bypass / Rewire / Hardwire Upgrade

Рет қаралды 542,323

3 жыл бұрын

In this video, I show how a fuel pump relay works and how to bypass yours. I also show how to rewire your fuel pump for an upgraded fuel system or race car. Aftermarket 5 pin bosch style fuel pump relays can easily be wired into any car and made to work with nearly any electric fuel pump scenario you can come up with. This info could apply to any Bosch 044 style pump, AEM external pumps, or even a Walbro 255 fuel pump.
Pin 30 - Incoming 12v to relay from battery
Pin 87 - Outgoing from relay to electric fuel pump power.
Pin 85 - Ground
Pin 86 - Trigger wire to turn on the fuel pump relay. Can be connected to a toggle switch, the ignition switch, or connected to the factory fuel pump relay wiring.
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Tags:
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#Automotivewiring
#WiringRescue
#FuelPumpRelay
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Пікірлер: 548

@WiringRescue 3 жыл бұрын

Thank You for Watching the fuel pump relay wiring video! Subscribe To This KZfaq Channel: kzfaq.info See My Wiring Playlist: kzfaq.info/sun/PLsF7T1tRFy2hmiiUUfMZNyV-BUA_yrPIh

@moustafaomerko6370 2 жыл бұрын

Hi i want to asking something its possible the electric fuel pump with RPM tachometer connected

@SDsailor7 Жыл бұрын

For what year vw vehicle is this video? Thank you

@SDsailor7 Жыл бұрын

very good video. very interesting and informative

@Schmitty_Luv2 5 ай бұрын

Do you have a multipump tutorial of this? Can the relays be linked in parallel using 87a to one toggle switch for example having a surge tank with 4 fuel pumps and 4 5 pin relays? Then keeping the factory in tank pump connected to the factory wiring?

@stu.c 3 жыл бұрын

Why does everyone else seem to take three times as long to describe half as much detail with a quarter of the clarity? Nice one... 👍

@WiringRescue 3 жыл бұрын

Thank you!! I’m glad it was able to help you out!

@C_71 3 жыл бұрын

@@WiringRescue I just watched 5 videos trying to find this one...they should delete theirs. Thank you!

@chris20a2 3 жыл бұрын

Facts wish this vid was out when I ran one

@Kihidokid 2 жыл бұрын

Visuals

@bykeryduh7237 Жыл бұрын

I agree.

@elitesniper7903 8 күн бұрын

Videos like this make me love wiring and electrical. When I don't know, I absolutely hate it that you so much,. great video!

@georgebrown7557 3 жыл бұрын

Funny how it’s easier to understand when placed out on a grid/chart compared to laying under a car trying to trace it ........ nice job

@WiringRescue 3 жыл бұрын

Thanks George! I did one similar a few months ago and people really liked it. So I bought a few more relays, switches and fuses so that I can do some more automotive wiring how-to’s! :) Thanks for watching!

@channelview8854 Жыл бұрын

There are very few creators on YT that know what they are talking about and, secondly, can communicate their knowledge to others. You are one of only a tiny handful that gets my unqualified approval. Thanks!

@WiringRescue Жыл бұрын

That’s extremely kind! Thank you so much for watching the wiring videos! I really appreciate it!

@richchester1871 Жыл бұрын

This was clear, not ‘wordy’, concise, and to the point…..unlike most others. Thx 👍

@Cliffordclown 3 жыл бұрын

Watched so many videos and was still left scratching my head on what to do, until I watched yours so easy to follow and straight to the point 👌👍

@WiringRescue 3 жыл бұрын

That’s awesome! Thank you for watching my video!

@hajrudinkavazovic2231 Жыл бұрын

What happens if I bypass fuel pump relay 85 - 86 on GM truck thanks buddy i so much worry do I made mistake on ECM to burn?

@mckeevb Жыл бұрын

This is the best video on this subject. Simple, accurate, thorough and complete. The wire for the trigger showed where my problem was. Thank you !

@WiringRescue Жыл бұрын

That’s awesome! Thanks for watching, I’m glad that you found the video helpful!

@champg.9129 3 жыл бұрын

Definitely the best explanation I've seen so far. Fuel pump relay went bad in my 04 Expedition and this is exactly what I needed.

@WiringRescue 3 жыл бұрын

Thank you! I'm glad it was able to help you out!

@lucrebec727 2 жыл бұрын

I'm here for the same reason on my 03 expedition. Lol what size fuse would be best for trigger and power? Same as factory fuse or something higher?

@dylanpassmore8186 Жыл бұрын

These videos are great. I found your channel at the perfect time. I’ve been rewiring a motorcycle harness and feel very overwhelmed, this honestly helped as this is on my list to do. Definitely glad to have came across this and now subscribed! Thank you

@hammonhph 29 күн бұрын

I love this, straight to the point, very easily explained. So simple you need somebody to help you misunderstand it!😳

@WiringRescue 29 күн бұрын

Thank you! If you like this one, you’ll probably like a few other more elaborate wiring videos I have! Sort my videos by views and check out the top ones if your bored :)

@1936Studebaker 11 күн бұрын

Thanks for making it so easy, I've put off installing an elec fuel pump for so long, now I can attack it with confidence.

@WiringRescue 10 күн бұрын

That’s fantastic! I’m glad the video gave you what you needed!

@joaquinaguirre2976 2 жыл бұрын

Thank you so much! I am having trouble to get 12 volts to the live wire. I will try your schematic to see if it works. Great video and well explained. God bless you Mr.

@WiringRescue 2 жыл бұрын

Glad you liked the video! Thanks for watching!

@rockabilly8427 4 ай бұрын

Thanks so much this helped me a lot. Been chasing wiring,fuses,relays, etc and still Didn’t have power to pump then decided try to re run it all Myself and found this video, thanks man

@turbo-nicky 7 ай бұрын

You are my mentor and you don’t even know it I will figure out a way to send you pics of my setup with everything I’ve learned from your channel when it’s done

@WiringRescue 7 ай бұрын

😂awesome! Post it on instagram and tag me in it @ratty_muscle_car

@Dhred2823 3 жыл бұрын

You helped me finish my project with this. This channel is a big help.

@WiringRescue 3 жыл бұрын

That’s fantastic! I’m thrilled to hear that my videos are helpful to people! Thanks for watching the video!

@wurich2355 Жыл бұрын

Nicely done with the parts mounted on the board for a good visual learning experience.

@jokrkillah 10 ай бұрын

I've used this 3 times now, thank you! Obd0 to obd1 honda conversion always messes with the fuel pump where it won't trigger it at all. This is a better fix than repinning the jumper harness

@WiringRescue 10 ай бұрын

Heck yes! That’s awesome! I’m glad you are finding it useful! Thanks so much for watching!

@tynado1173 2 жыл бұрын

I was 25 hours from home and this setup got me home. Moab to Detroit. Used a light bar wiring kit from Walmart. It had every component you listed. Can’t thank you enough.

@WiringRescue 2 жыл бұрын

That’s absolutely badass! I’m so incredibly thankful and excited you wrote this. It’s really motivating to know that my videos are actually helping out people! Thanks for watching!

@tynado1173 2 жыл бұрын

@@WiringRescue I was stranded in a parking lot. it took me half a day to diagnose the short somewhere in my pump relay circuit. Crank no start. No voltage at the pump. Couldn’t find the short so I bypassed everything and used a rocker switch. You literally saved me thousands of dollars. The world is a better place with awesome people like you. Thanks again

@robertjahrling2377 Жыл бұрын

Dude the best video I'm a carpenter not an electrician and I've been looking for a week for a video that would simplify these things This video is straight into the point thank you 👍👍👍 Ps I will be sure to like and share and anything else to promote that I can

@fabianpillay2511 Жыл бұрын

I'm not a mechanic I'm not a electrician but this video helped fix my problem on the signal wire. The electrician told me the pump is gone an I have a racing pump saved alot off money THANK You VERY MUCH,🙏

@WiringRescue Жыл бұрын

That is the best possible comment I could hope for on one of my videos! Thank you so much for sharing it with me. I really am happy that the video gave you what you needed and saved you some cash !

@fabianpillay2511 Жыл бұрын

U should see my face when the car started 😎 thanks again I appreciate your video,🙏🇿🇦

@frekkledipped Жыл бұрын

Great vid I was about to install a switch for my hi pressure fuel pump but using a relay makes much more sence for my 500hp 65 GTO😛

@otisang1012 3 жыл бұрын

Very nice video that was fun to watch without getting confused or lost.

@WiringRescue 3 жыл бұрын

Awesome! I’m glad it was helpful to you! Thank you for watching!

@jadalaspablo3695 8 ай бұрын

literally the best video i've seen on this. thank you

@A90MKV_ 3 жыл бұрын

This is what I needed! Thank you well put

@WiringRescue 3 жыл бұрын

I’m very happy that it helped you out! Thanks for watching!

@UncleDoctorG Жыл бұрын

Best video I’ve seen on the subject. You’re the man!

@davidg5704 3 жыл бұрын

Yeah I used these 5 pin relays to add factory power windows to my vehicle. Bought a FSM wiring book then created my own wiring loom. Used heavier grade wires and they work faster than if factory installed.

@WiringRescue 3 жыл бұрын

Yes! These things are so cheap and universal, which is awesome. On a car, they have an infinite amount of uses. Thanks for watching the video!

@slantfish65sd 5 ай бұрын

Hey just watched your video here. Really good stuff. I love how you've laid it out on this piece of cardboard and just made it really simple and straightforward. I love that. I feel like if you can lay stuff out in front of you and trace it out. It's just so much easier to visualize it and think about it in your head

@bobwebber6484 Жыл бұрын

You may add, that a relay needs to be diode protected in order for the circuit to be computer controlled. So that when the relay coil is turned off it does not back feed voltage into computer.

@mercedesmaintenance.6339 2 жыл бұрын

Just what i was looking for. I'm building an engine test stand, this will be perfect. Thanks so much.!!

@WiringRescue 2 жыл бұрын

Happy to help! I’ll likely be needing your channel’s advice as I do more work to my 71 Mercedes! kzfaq.info/get/bejne/r9yarcijuqzaqX0.html

@mercedesmaintenance.6339 2 жыл бұрын

@@WiringRescue Absolutely. I also run a Facebook group " Mercedes Maintenance" join us. Loads of expert and helpful people there. Cheers John 🍻

@whodatnunyabiz6050 Ай бұрын

OMG! This is 110% perfect! Thank you so much for the short and simple explanation! Great video!

@WiringRescue Ай бұрын

You’re very welcome! I’m glad it helped you out!

@dunemaster3179 2 жыл бұрын

Thank you for making this explanation so simple

@WiringRescue 2 жыл бұрын

Happy to help! Thank you for watching the video!

@KevinRoadrageGarage 3 жыл бұрын

Good job. The least confusing version I've seen

@WiringRescue 3 жыл бұрын

Thank you! I’m thrilled to hear you found it helpful! :)

@mclawry476 Жыл бұрын

Glad I found this. I am already a subscriber. I wired a relay off my ignition wire to aft as a “jumper” to keep my ign switch from overloading. But I think it’s causing issues. The pump does not come on now. Also my grounds should go to each other and on pin 85. Will try this. Pump worked before but I had aftermarket efi. Now I switched back to carb and the fuel pump does not work. Will rewire and retry! Before the ecm would “ground” the pump and switch it on.

@vsavoldi 3 жыл бұрын

B E A utiful ! I love this presentation!

@WiringRescue 3 жыл бұрын

Thanks! I’m glad you liked it! Subscribe and I’ll make more!

@lowbob1999 3 жыл бұрын

love the vids man. i definitely look forward to your videos... and not just cause im also ls swapping my 72 lemans as well!

@WiringRescue 3 жыл бұрын

Thank you Mike! I'll keep making them if you keep watching!

@mattmacias8849 Жыл бұрын

exactly the video I was looking for thanks🍻

@WiringRescue Жыл бұрын

Awesome! I’m glad that it helped you out!

@AntonioClaudioMichael 3 жыл бұрын

Great work on this video

@ibrahimbbenameur149 Жыл бұрын

Thanks a lot for these videos... it's simple and well explained ...big thumbs up

@WiringRescue Жыл бұрын

Thanks for watching! I’m glad that you liked it!

@esko23q 2 ай бұрын

Im not great with stuff like this - That being said probably the best explanation out there

@WiringRescue 2 ай бұрын

Thanks for watching! I have tons more wiring videos, if you find yourself bored this weekend. Good luck with your project!

@esko23q 2 ай бұрын

@@WiringRescue I'll be undertaking this soon as I have no power on my fuel pump .. relay ok fuel pump ok ground ok but no power . The next step just hardwiring it and be done with it lol

@rogerlabbee6625 3 жыл бұрын

Watch all already. Wish you had more. All great.

@WiringRescue 3 жыл бұрын

I’ll keep making them if you keep watching them!

@bagusprihastomo7439 3 жыл бұрын

Like how you explain everything, I'm your new subscriber now 👍

@WiringRescue 3 жыл бұрын

Thank you! I appreciate every subscriber I earn!

@DrStickyTits 3 жыл бұрын

I did this exact thing today but with auxiliary fans 👌

@WiringRescue 3 жыл бұрын

Ha! That’s funny! I find myself doing this style circuit constantly when working on my old cars. As always, thanks for watching!

@gburn9377 2 жыл бұрын

Perfect explanation!

@WiringRescue 2 жыл бұрын

Thank you! I appreciate the kind words.

@marcoafigueroa1943 Жыл бұрын

The best video on KZfaq thank you

@WiringRescue Жыл бұрын

That’s a serious statement! Thank you so much! I appreciate it!

@loganmelton2370 9 ай бұрын

Subscribed. That was what I needed thank you. I have a 2007 Acura TL. No power to the fuel pump. Fuse is good. Relay is good. Wiring is correct. I’m not sure what wrong with it. Maybe fuse box? I’ve run out of time and money so this may just have to do the trick.

@switchpb 3 жыл бұрын

Awesome video man made it super easy

@WiringRescue 3 жыл бұрын

Thank you! I'm glad you enjoyed the video!

@rogerlabbee6625 3 жыл бұрын

Wiring videos are all outstanding.

@WiringRescue 3 жыл бұрын

Thank you! I have a bunch if you're bored! Check out this playlist kzfaq.info/get/bejne/mZ56d7SjutfZp2w.html

@WiringRescue 2 жыл бұрын

@Roger Labbee Thank you! I really really appreciate that!

@chris20a2 3 жыл бұрын

Good video a lot info best video for fuel pump relays on KZfaq

@WiringRescue 3 жыл бұрын

Thank you! I really appreciate that!

@LMBee00 9 ай бұрын

Thank you for your help!

@seanwilliams5403 4 ай бұрын

Best explanation to date, great content

@WiringRescue 4 ай бұрын

Glad it was helpful! Thanks for watching!

@woodybear8298 3 ай бұрын

Terrific explanation and diagram. I'm trying to drain the fuel tank on my 204 Buck Ranier, and have tried using a jumper, but I can't keep the pump running. I will have to study your setup and try again. Thank you.

@AntonioClaudioMichael 3 жыл бұрын

Nice wiring video

@dpmitko 2 жыл бұрын

Most ECUs control the pump (in fact all actuators and other stuff) with switched negative. Positive is always present at the pump, as switched positive can backfeed the ECU.

@Callaw2k Жыл бұрын

I was just watching a bunch of switching trough relay videos and none of them switched nor the relay or applications trough zero. What a shame.

@bigdaddy7358 10 ай бұрын

Ummm.......nope. You will NEVER see always positive at a pump. If you do, you f'd up. You do, however, find constant positive at the relay

@karenthomson9749 Жыл бұрын

Great job 👍🏻

@WiringRescue Жыл бұрын

Thank you! I really appreciate it!

@noidretlaw Жыл бұрын

Thanks for the info!

@WiringRescue Жыл бұрын

You are very welcome!

@karimsmail8925 2 жыл бұрын

Well explained thank you

@WiringRescue 2 жыл бұрын

Thank for watching! I appreciate it!

@garagesociety9907 2 жыл бұрын

Great video. I follow for your work.👍🏻

@WiringRescue 2 жыл бұрын

Thank you! I appreciate you watching!

@lewiswilson5624 2 жыл бұрын

Great advice

@WiringRescue 2 жыл бұрын

Thanks! I’m glad you like the video!

@kennybrandow4994 3 жыл бұрын

You sir are excellent keep it up

@WiringRescue 3 жыл бұрын

Thank you. You are pretty excellent as well. Thanks for watching!

@jonathanlyons5557 2 жыл бұрын

Great video, do you have a video that explains how to wire dual relays to a selector valve for running dual fuel tanks?

@mohdqurban176 Күн бұрын

Thanks dear sir, thankful video 😊

@AntonioClaudioMichael 3 жыл бұрын

Shared on social medias bro good work

@burn_out_king2178 3 жыл бұрын

nice video put me on on put a second pump on my charger thanks 👍

@WiringRescue 3 жыл бұрын

Awesome! Thanks for watching the video!

@andrewvinson7369 3 жыл бұрын

Thanks a lot!

@WiringRescue 3 жыл бұрын

Thank you for watching!

@gburn9377 Жыл бұрын

THANK YOU THANK YOU THANK YOU!

@WiringRescue Жыл бұрын

You’re very welcome! Glad you found the video useful! I’ve got LOTS more too if you find yourself bored this weekend! Haha!

@bykeryduh7237 Жыл бұрын

Very helpful video

@WiringRescue Жыл бұрын

Thank you ! I’m glad you found it helpful!

@RMACIAS2460 7 ай бұрын

Great job 👏🏾 thx

@thud9797 Жыл бұрын

If you don't have a factory computer trigger wire make sure you run the trigger wire through an oil pressure switch, the last thing you want in an accident is the fuel pump running feeding a possible fire.

@WiringRescue Жыл бұрын

Agreed! Another option would be an inertia switch like I showed in this video. kzfaq.info/get/bejne/g66XgKt2m7q5d2w.html. Thanks for watching and sharing a good tip!

@offgridislandfamily 3 жыл бұрын

Great video! Thanks!

@WiringRescue 3 жыл бұрын

Thanks! Your channel name is excellent! (I

@offgridislandfamily 3 жыл бұрын

@@WiringRescue Thank you sir!

@kingbojackson8822 Жыл бұрын

Excellent 👍

@WiringRescue Жыл бұрын

Thank you! I appreciate it!

@Stevie2828 2 жыл бұрын

Great video, one question though. Is it best to keep the relay close to the battery up front or closer to the fuel pump in the rear or does it matter?

@idratherfeedturtles 3 жыл бұрын

Thank You ! !

@WiringRescue 3 жыл бұрын

I’m glad the video helped you out! Thanks for watching!

@ilikesubaru 2 ай бұрын

Thank you so much for posting this video! Any recommendations how to use trigger wire based on boost level or only turn it on when car is above certain rpm range ?

@WiringRescue 2 ай бұрын

When it comes to upgrading fuel systems in turbochargerd cars, people usually upgrade the fuel pressure regulator to one that is a 1:1 rising rate. That way you can run a high volume fuel pump all the time and it runs like stock. However, when the turbo spools and starts making boost,the fuel pressure increases 1psi for every 1psi of boost. For higher horsepower applications (maybe 600hp+), you’ll get into larger fuel line, multiple pumps and surge tanks/swirl pots. Below that, 1 good high volume pump should do the job just fine.

@craigfield1685 Ай бұрын

Thanks!

@WiringRescue Ай бұрын

You rock! I truly appreciate this!

@direct998 2 жыл бұрын

Thank you !!

@WiringRescue 2 жыл бұрын

You’re very welcome! Glad it helped you out!

@lekonarodrick6821 3 жыл бұрын

U are totally outstanding man, thanks alot

@WiringRescue 3 жыл бұрын

I’m glad you liked it! You’re outstanding as well!

@tyrell2159 3 жыл бұрын

Ur brilliant

@WiringRescue 3 жыл бұрын

And you are a champion! Thanks for watching!

@jjones7831 10 ай бұрын

Great video. I’m assuming I can use the same gauge wire if I’m switching over from a mechanical pump, amperage fuse according to manufacturer or is there a standard, thanks

@Raultrevino723 3 жыл бұрын

Quick question, I'm trying to add a kill switch to my truck for the fuel pump... When I cut the positive wire to it from the fuse box do I run 2 wires from pin 87 to connect to each wire... Also since it's going to be on a rocker switch can I just add a jumper wire from pin 30 to 86 and it still work, or do I have to run pin 86 back to the battery...

@huseyinh6041 2 жыл бұрын

Thanks.

@WiringRescue 2 жыл бұрын

Your welcome! Thank YOU for watching!

@beastman.330 4 ай бұрын

I give this video a 10/10.

@WiringRescue 4 ай бұрын

😂 Thank you! This was one of my earliest wiring videos and it seems to be a hit. However, this one is my personal favorite kzfaq.info/get/bejne/j-BpntSpvNHTeH0.html

@beastman.330 4 ай бұрын

@WiringRescue question: could I use any 4 pin fuel pump relay from any car to create this setup. Plus does the relay need a earth wire for the relay to work. I just put an AEM 340LPH in a mitsubishi GTO in uk.

@WiringRescue 4 ай бұрын

@@beastman.330- Mitsubishi GTO’s are awesome, and I happen to be a big Mitsu enthusiast actually . So - your 4 pin relay just needs to be rated for the amperage that your fuel pump draws. Most aftermarket relays are rated 25 or 30 amps, and I think a 340 will draw less than 20 if I recall correctly. You DO need to ground pin 85 on your relay to a good ground/earth. Then the pump will need a ground/earth wire as well. Your factory fuel pump wire will go to pin 86 and it will turn your relay on. Pin 87 will go to your pump. Pin 30 will be a fused power source from your battery. Again, this fuse should be rated just higher than your fuel pump amperage draw. And this wire needs to also be rated for a higher amperage than your fuel pump draws. I usually use 8 gauge wire when I rewire fuel pumps.

@beastman.330 4 ай бұрын

@WiringRescue Thank you very much, my friend.

@WiringRescue 4 ай бұрын

@@beastman.330 - happy to help! Good luck with the Mitsu GTO!

@mindaugasminde7 11 ай бұрын

Good video, if I want run two pumps can I use 87a,or 87 split In two cables?

@tomisnt 3 жыл бұрын

You are amazing

@willykiddsDONK 2 жыл бұрын

Thank you

@WiringRescue 2 жыл бұрын

Your welcome! Thanks for watching!

@papergatorzfedducca7998 2 жыл бұрын

New subscriber 🔥🔥🔥

@WiringRescue 2 жыл бұрын

Thank you!

@dwight_boi 3 жыл бұрын

This might get my Z back up and running!! 😦🤞🏽

@dwight_boi 3 жыл бұрын

If I run this relay do I disconnect the factory relay?

@WiringRescue 3 жыл бұрын

@@dwight_boi - you absolutely can. Or you can use the factory fuel pump feed wire to power pin 86 on the new relay. That way the new relay is controlled with all the factory key-on controls. That is assuming your factory setup works, which is seems like it may not. So - yeah, I’d probably just ignore all the factory stuff and do this setup instead.

@dwight_boi 3 жыл бұрын

@@WiringRescue IT WORKED!! Got my Baby up and running!! Thank you!!

@aammadmustafa5985 3 жыл бұрын

Did you put a switch?

@dwight_boi 3 жыл бұрын

@@aammadmustafa5985 yup! Just a simple on / off switch

@gianlucagiustiniano2525 Ай бұрын

Complimenti, ottimo video, secondo te è possibile aggiornare questo cablaggio con un potenziometro di flusso per la pompa?

@haroldolson5877 3 жыл бұрын

This has to be the best video I have ever seen. Nice work!

@WiringRescue 3 жыл бұрын

Wow! Thank you!!!

@wesleybrock2971 3 жыл бұрын

If I’m running a HP fuel pump AND a LP lift pump. Do I just have th few same wiring? Just twice running along side?

@Sultaneous 2 жыл бұрын

Awesome diagram for us visual/practical learners, thanks. What is the purpose of 87A? Is it for an alternate circuit sharing the ground (85) with 87? Does it trigger synchronously with 87 from 86 (on trigger, 87 and 87A both become high), or does it alternate state with 87 (ie, 87 high, 87A low, then 87 low, 87A high)?

@WiringRescue 2 жыл бұрын

Thank you! I actually made a video that answers exactly this question! Take a peek when you have a chance! kzfaq.info/get/bejne/jZh9pZWLzNyVc58.html

@kirkgreenman1386 2 жыл бұрын

This is my next step after getting the break lights working

@WiringRescue 2 жыл бұрын

Excellent! I’m glad you find the videos helpful!

@xXE92BeastXx 2 жыл бұрын

If you wanted to have a hobb switch activate the secondary pump would you just run the trigger wire (86) to the NC on the Hobb Switch then once the pressure is reached it will close the circuit?

@neyney5469 Жыл бұрын

Doing this can improve presure of fuel? Good for high load engine for racing?

@Me2God52 3 жыл бұрын

Great video and easy to follow. I have my LS3 all hooked up accordingly, the pump comes on key ignition, and it starts up. however when I run the car down the road easily and then jump on it, the fuel pump shorts out, but not the fuse and stops the car. I would take a live 12V battery spare wire and hook it to the fuel pump wire and start the car and it starts so I could get back home, then I have to disconnect the "hot" wire off the fuel pump wire otherwise the engine would stay on after removing the key. What connection do I have wrong that would make the fuel pump cut out just by quickly jumping or accelerating the engine?

@jonathanlyons5557 2 жыл бұрын

You running dual tanks? I’m doing my first LS swap in a 77 C10 and could use some help where possible.

@NIN_THUG 2 жыл бұрын

Heavier gauge wire, fuse, relay and good grounds. It seems like the pump is demanding more than it can get.

@mikeloomis2091 9 ай бұрын

So, let me see if I understand this correctly? My situation I am converting from efi on my 1981 jeep cJ7. I am retaining my in-tank fuel module (fuel pump). the power from my fuel pump will connect to PIN 87 and 30 will be connected to battery power and My trigger PIN 86 if I wire in a switch can come from the same 12v power source as PIN 30? Or, I could wire in the switch off of PIN 86 to my ignition power source and I would have to switch the switch to on to get fuel or if I left it off, I could use accessories power and not have the pump running if I did not want to start the engine? Do I understand that correctly... Sorry if this is a stoopid question. Thanks for your video it has helped a lot.

@sukbadaimonghol1089 2 жыл бұрын

Are these wire setup safe on modern car's design? Because it have safety design built into ECU just in case there's an accident so that it can shut off vehicle fuel pump from not getting rpm input information from crankshaft sensor?

@calircpilot4261 2 жыл бұрын

I Love the physical schematic and great explanation. I do have a question: on another video I saw that the presenter mentioned about wire “87A” as your direct hot wire to the fuel pump in case of emergency, is this true? . Now, my pump will run but it will not prime when I turn the key on, the vehicle requires, at least, two good long cranks to then start. After that, I can hear my fuel pump humming normally. I also replaced the relay only to observe the same behavior. Is this a sign my pump,is going bad? All of this happened after my mechanic replaced the electronic spark control among other things. Please shed some light? Thanks again!

@WiringRescue 2 жыл бұрын

Thanks for watching! I haven't seen that other video, so I can't be exactly sure how their circuit worked. There are many ways to wire a fuel pump though, so anything is possible. If the fuel pump isn't priming when you are trying to start it, I would expect it to be very difficult to start. If I were you, I would connect a fuel pressure gauge to the fuel system and see if it is getting fuel pressure when cranking the engine. If not, hunt down the reason why. It sounds like you may already know this reason. My guess is that your fuel pump is getting fed power in the "Run" position, but not the "Start" position. Good luck!

@alundrasrt 2 жыл бұрын

Any tips? My ECU have strategies like low voltage at idle and 12v for the original fuel pump. Thanks.

@darrylburr3840 3 ай бұрын

Great stuff can you advise what gauge wire you mean when you say heavy gauge and what size fuses would you use for this.

@WiringRescue 3 ай бұрын

I actually made a video to answer that exact question. Check this out: kzfaq.info/get/bejne/e86qgZmGydTRgHU.html

@cesarramirez6658 2 жыл бұрын

Thank you so much for the video! What size gauge wire did you use?!

@WiringRescue 2 жыл бұрын

The wire size depends on the fuel pump you have. I actually made a video on that too! Check this one out, I think it will help make sense of it all. kzfaq.info/get/bejne/e86qgZmGydTRgHU.html