How to Install LS Engine Coil Harnesses | Prevent Misfires and Timing Issues

[@mrfish3971]

This video saved my life!! My marriage, my money and my sanity. Ls3 was backfiring so loud all the neighbors came out.

[@onebadgto5460]

I’m in the same process right now my wife kids neighbors are pissed off

[@HoldenZ28]

Mr. Hillock, Thanks for this video! I recently installed a Chevy Performance Stand Alone Wiring harness for the LS3/480 and could start my engine, just backfires and sputtering! After your video, I turned the coils terminal 180° and the engine started immediately without a hiccup! Yes, the wiring harness was inverted! Thanks again.

[@bpautomotivellc]

Glad to hear the video got you up and going! Thank you!

[@funvic]

I'm new to the LS game (and very late, lol!), so this is great info! Much appreciated! I'm proud that the best harnesses are made right here close to home.

[@bpautomotivellc]

Nah, you’re not late, no better time than the present to get started!

[@dalehall2993]

​@@bpautomotivellc just received my lsa sub harness today!😎👊🏻

[@bpautomotivellc]

@@dalehall2993 thank you! We computer test those as well to ensure accuracy! If you have time check out our computer tester video! Thank you!!

[@dalehall2993]

@@bpautomotivellc Will do...👍🏻

[@manuelmurillo4027]

Hey bye any chance any type of coil harness thay will work with holley bracketless cover

[@chargerbox]

Great video..This saved my huge headache figuring out my misfire...THANKS!

[@mr2hard2see]

I remember making this mistake and didn’t get to complete my dyno session. I had flipped the coil harness some how during my LSA blower install and had it 7,5,3,1. Long story short I figured it out after towing it back home. I just wish my tuner knew this and we probably would have identified the problem right away.

[@JustinBruce-m1i]

This was very helpful and thank you.I appreciate it❤

[@Fl4m3thro3er]

Learning as I go, but this video helped. I bought after market coil wiring, and I had the passenger side reversed. I could never get it to start right up even with a base tune. It has always taken multiple cranks and lots of back firing. Thank you.

[@bpautomotivellc]

Glad we could help!!

[@irvingbar4569]

@@bpautomotivellc great video I’m currently running Jegs 40164 GM LS Ignition Coil 1999-2007 5.3ls would the Set 8 GM OEM Delco 12611424Ignition Coils LS3 LSA D510C 12570616 work for my application and would I need to retune 5.3 ls turbo build car has already been tuned

[@Peculiarsafe83]

The electrical components like ignition coils and ignition coil harnesses is what makes the vehicle run. They’re not like older carbureted vehicles. They’re specifically designed to run the most efficiently on OEM parts. When you start putting in cheap or even expensive aftermarket parts, then you change the way the computer reads that part. The OEM replacement part is designed specifically for the factory tune of the vehicle. Aftermarket parts are not, because they’re not the manufacturer who knows how the factory tune is. If you have the vehicle tuned away from the factory tune then it’s a different story, because it can be tuned to the aftermarket parts. But aftermarket parts on the factory tune is a no go. Replace the sensors/ignition parts or harnesses with OEM parts.

[@gregm784]

Great video! Thanks for the simple video

[@erickcontreras637]

Great video Any idea which color is grounds I just found the cyl #4 have power but still no spark Had switch ; coil ,cable or wire, spark plug. And still no spark Tester light up in 4 prongs, Do I need a new harness??? Thanks

[@bpautomotivellc]

That’s not enough info to say for sure! The ground is black and is in cavity A!

[@joshjoejamescarbone5419]

I got an aftermarket harness what color is the one for the transmission do you have a number or how do I contact a do I just keep speaking to you through this page let me know I have a few questions this video really helped me on the colors took them off forgot which way they went

[@bpautomotivellc]

Are you referring to the power wire to the transmission?

[@saltytidee]

Please help just got a new set for my 2005 gmc serria and the wires are different colors and I can’t tell which go where one has pink in it one has red and so on

[@araparts]

Awesome video!

[@bpautomotivellc]

Thank you!

[@brandonrobishaw7606]

Could you show me how to connect and disconnect the plugs without breaking

[@bpautomotivellc]

If the retaining clips are breaking and you are not being overly rough with them it is more than likely that engine bay heat has caused the plastic to be slightly more brittle. This can happen if they are the original coil harnesses!

[@brandonrobishaw7606]

​@@bpautomotivellc I ended up getting it with a pick. In my case the harness wasn't breaking it turned out to be the stupid black loom GM used. I wish they would have used the fabric type.

[@johngiord1986]

Hi mate, my LS2 coil connectors are all the same colour. Red, purple, grey, black.?

[@bpautomotivellc]

Sounds like you have aftermarket reproduction harnesses that did not follow GM Color Codes.

[@XenoSeven86]

Did this exact same thing haven’t fired it yet but I knew I had to double check

[@marioarroyo9633]

Do you sell these coil sub harness?

[@Mliudahl]

Perfect video Thankyou

[@mikeschreifer5819]

Thank u very much

[@HoldenZ28]

couldn't;'t

[@yousefjavid9056]

Pin OT piliz koil LS2

[@paisley2342]

P B G R. RGBP

[@andresurvina4965]

@bpautomotive