map-marker Dallas, Georgia

Help with fans tyeni g on

Unable to get electric fans to cut on i connected the green and blue wires to the negative wires of the fan get the engine up to temp fans will not kick on but if i straight wire the fans the fans will come on. Help me
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Clarence Xnm

Shady business practices.

Got product overnighted. The product never showed up after two times. They blamed it on UPS. What it was they creat labels and do not give instructions to ups so it seems like you product is on the way. When in fact they don't have it in stock. They will lie and duck out on you never returning your money. The only way you get it back is a law suit. Do not do business here Ryan and Jeremy the manager will just lie directly you with out batting an eye.
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Reason of review:
Order processing issue

Harness and attitude sucks.I heard it's made oversea

Car wont start no injectors working and nofire at the coils did 5 swaps never used Psi.Never will again
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Reason of review:
Bad quality
map-marker Stockbridge, Georgia

PSI Conversion Bad Wiring Harness Beware

same for me brought wiring harness 1018 for my 1982 Chevy truck and the wiring harness is no good, my auto mechanic told me to put it in the trash, this guy is ripping people off for their money. called this guy and he keep tell me its being installed wrong or I have the wrong harness, but its the one he recommended when I brought the harness, he is not willing to give me a refund on the product just what me to buy another one. he need to be in jail for taking people money, the product is cheap the clips fall of the wiring harness when installing.
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Reason of review:
Bad quality
map-marker Toms River, New Jersey

RIp off , LS1 wire Harness, PSI ***

Shady rip off wire harness artist, bad customer service, harness wires get very hot, constant burning smell, injectors stop transferring power after harness gets hot. Tried to call but get a bad attitude and the guy trying to upsell me every time I call, Should have used a more reputable company. This guy works from his house and acts like a player, I cant get my money back so Im going to warn people of this crook, he has the word *** in his company name PSI *** I should have opened my eyes and not just based my decision on $$$. Now I have to pay another 1600.00 for something that works. And I have been calling round and the word is the harness are made by in India not the USA. Major Lie. I lost a job a while back to outsourcing and feel this is very underhanded, if its true you need to tell your customers you are using non-UL approved wire.
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This is 100% not true. All PSI harness are Made in the USA, and have ALWAYS been made in the USA.

Harnesses are professionally constructed from Brand New GM Delphi Connectors and TXL (Polyethylene Cross Linked) High Temperature Wire to GM Specifications.

All harnesses are 100% Quality Inspected prior to shipping.

All Harness include a 12 month / Unlimited Mile Warranty.

This website is a scam, don't believe what you read on here. They slander businesses and then extort them to "fix" it and remove these false reports.


I agree I'm using it now been 3years not one problem if you're wires are getting hot you ran something wrong


I bought a harness from these guys and my I have no injector pulse also my throttle body wouldn't respond when I stepped on the fuel pedal and found that wires in the gas pedal connector weren't even in the right position. Now I'm stuck with a truck that won't turn on. $800 down the drain


I just installed my PSI harness last week, I bought it about 3 years ago it's been in the bag un opened... yesterday I had a buddy over to flash the computer so I could start it and it's not starting.

I pulled one of the plugs and there is no fuel on the sparkplug after about 45 mins of trying to get the thing started....

after looking over the psi wire harness at a few of the plugs it looks like someone was trying to probe the wires because there are a few wires that are pierced right before they go into the plug on a few of the plugs. I have a feeling this is going to be a nightmare


Yes I agree bought a harness from them and one of the wires was in the wrong pin out hole cost me thousands of dollars and time, when i finally got it figured out they would not stand behind there mistake or product. So I will not do business with them again.


This person is not telling any truth. I've been using PsI harnesses since their beginning...

Tell us, where do you get non-ul listed wire? Since when does anyone get hot wires on a harness, Thats draped over a hot running engine?! Clearly, this is a spoof- did blog.. So what if he works from his house..

So did Thomas Edison dumbazz.. And now the entire world has electricity and things that need electricity.


Your *** skippy they are made in the U.S.A; because I build them and we have never heard of there ever being a problem. You obviously didn't hook it up right or you had the wrong harness.


i had them program my ecm and it was wrong so i called them and sent it back to them and they havent sent me it back they have had it for 2 months now and they wont return and phone calls or emails about it


None of these commentators are real customers. These aren't even the names of real people.

Psi harnesses are made in the USA. Outsourcing of wiring would never go to India, Mexico maybe but not India.


I’m changing out a PSI harness that I installed 5 years ago, from the start I had issues, cam position sensor was pinned wrong, a couple of years latter while trying to find why I was experiencing a sudden shut down we also found that the MAF was also pinned wrong and I was running speed density only. So today I started ripping out their harnness to install someone else’s.

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