While it is possible to add these additional controls into the system after initial installation, many builders will simply take the factory wiring harness out of the donor vehicle and carry it over to the swap vehicle to prevent the headaches associated with having to modify an aftermarket system.Ĭheck out the video below for a helpful breakdown of what to consider in a situation like this. You may be wondering if a standalone harness is a viable option here. Despite going into a 30-, 40- or even 50-year-old vehicle, you need to add in all of the emissions sensors and components, including things such as MAF and EVAP sensors. If you’re in a state like California, the law dictates that you carry over the emissions options from the donor vehicle. Keep in mind that the make and model will determine the manufacturer needed for this. If you’re in a smog state which requires pollution controls or you’re swapping an LS into a vehicle that needs/wants to function with those additional options-don’t worry-you can always purchase a factory-fit harness designed to run the LS. What if I want/need those additional options? Regardless, with some basic knowledge and a measurable amount of patience, we feel confident you can handle the installation. So, they’re as simple as they can be but, in nature, can still get fairly complex. That being said, while some standalones feature as little as four connections to get the engine running (say, one each for the battery, ground, ignition, and fuel pump), other connections will need to be made to the computer, sensors for data logging, and so on. This is because it is not intended to run a lot of the additional options, like cruise control or fuel management. Compared to a factory wiring harness, a standalone harness is a bit smaller and features less connections. A standalone harness is used just for engine control, i.e. You may be wondering what in the world standalone means. Another option? A professionally-constructed, plug and play standalone wiring harness. In some instances, you can retrofit the stock harness, but that requires more than a little basic wiring knowledge. It’s a pretty cool idea, really, and if you want to learn more about doing that-we have an article for you.īut let’s say you’re sticking to fuel injection. You have two options to getting your LS to run: either you get a standalone harness or you get yourself set up with a carburetor. What are my options for running an LS engine? In fact, getting that LS to run can be a breeze. Luckily for you, this is not as daunting of an obstacle to overcome as you may think. In a series on LS engine swaps we can’t leave out the need to wire it up! Your ‘69 Camaro, ‘70s Chevelle, or even ‘90s Firebird isn’t set up to run an LS engine-so, you need to get your hands on a wiring harness to run that thing.
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