Howell EFI’s new  Ecotec3 Truck Harness Kits allow the transplant of an EcoTec3 4.3L V6 engine, 5.3L V8 engine, and EcoTec3 6.2L V8 engine from 2014 + GM trucks and SUV’s into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines and more.

Howell EFI’s OEM quality harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, and a complete stand-alone design to control engine functions. Harnesses requiring emissions connections are also available upon request.

• 6.2L V8 engine Kit Harness part #HVL625846T
• 5.3L V8 engine Kit Harness part #HVL535846T
• 4.3L V6 engine Kit Harness part #HVL435846

Click here to view our full lineup of GM EcoTec3 conversion products.

To learn more or to order your harness, contact Howell EFI at www.howellefi.com or call (810) 765-5100.

Howell EFI has always been very well respected for their many Jeep TBI kits for the off-road market, as well as their many kits for the 304, 360 and 401. Now available are Ford TBI kits from 240 CID up to 460 CID. In fact, for anyone interested in converting a V6 or V8 engine from carburetor to throttle body fuel injection with an ignition other than points, Howell can create a throttle body kit for any configuration.  If you don’t see the part # you are looking for, give us a call.  And remember, some TBI kits come in a one size fits all offering. We at Howell understand that one size does not fit all, and work closely with every customer to be certain each aspect of their set up is discussed to ensure kit components are a perfect fit.

The kit features a remanufactured GM throttle body appropriate for your engine size, and operates engines with or without ECM controlled ignition. It contains all sensors, components, wiring harnesses, ECM and fuel pump to install fuel injection on your engine. Also includes custom calibration PROM, and an ECM that installs under the dash. The fuel pump installs in the main fuel line, and bypass fuel is returned to the tank. Harnesses include a diagnostic connector, and diagnostic is similar to 1986-92 GM pickup. The kits have proven to be especially popular for older street-driven, or 4 wheel drive vehicles, and greatly increase drive-ability, fuel mileage, and cold starting.

Look to Howell EFI to make your conversion happen with ease. Link to video here.

Click here to view our full lineup of Ford products.

To learn more or to order your conversion kit or harness, contact Howell EFI at www.howellefi.com or call (810) 765-5100.

Howell EFI, well respected for their many Jeep TBI kits for the off-road market, as well as their many kits for the 304, 360 and 401 introduces an expanded line of TBI kits. Now available are kits for 225” Buick, 302 Ford, 351 Ford, Internationals, Pontiacs, Chryslers and more. In fact, for anyone interested in converting a V6 or V8 engine from carburetor to throttle body fuel injection with an ignition other than points, Howell can create a throttle body kit for any configuration you have.  If you don’t see the part # you are looking for, give us a call.  And remember, some TBI kits come in a one size fits all offering. We at Howell understand that one size does not fit all, and work closely with every customer to be certain each aspect of their set up is discussed to ensure kit components are a perfect fit.

The kit features a remanufactured GM throttle body appropriate for your engine size, and operates engines with or without ECM controlled ignition. Contains all sensors, components, wiring harnesses, ECM and fuel pump to install fuel injection on your engine. Also includes custom calibration PROM, and an ECM that installs under the dash. The fuel pump installs in main fuel line, and bypass fuel is returned to the tank. Harnesses include diagnostic connector, and diagnostic is similar to 1986-92 GM pickup. The kits have proven to be especially popular for older street-driven, or 4 wheel drive vehicles, and greatly increase drive-ability, fuel mileage, and cold starting.

Look to Howell EFI to make your conversion happen with ease. Link to video here.

The 1971-’93 Jeep Wagoneer and Grand Wagoneer have a huge following among off-road enthusiasts. Howell EFI has recently released a carburetion to throttle body fuel injection swap kit which includes everything you need to swap over your 360 or 401 V8 to fuel injection eliminating all of the carburetor issues that plague these classic offroad vehicles. Upon installation, traditional fuel starvation issues will be eliminated and you will enjoy better cold starting, improved MPG, better driveability and the ability to attack any angle on the trail without the fear of fuel loss.

The kit is made up of almost all GM TBI OEM parts and includes the following:

• GM Throttle Body
• Adapter plate (intake) for 2BBL or 4BBL
• Wiring harness designed to put the ECM under seat or in center console as the Wagoneer is very crowded under the dash
• MAP Sensor, coolant sensor, oxygen sensor
• External fuel pump, fuel filter, fuel pump block-off plate
• GM ECM (computer) and calibration prom made specific for the 360/401 Wagoneer engines
• Full installation instructions and troubleshooting guide

The result is a plug and play system that will completely replace the factory carburetion system and includes the GM computer “tuned” specifically for this application. As with all Howell EFI systems, the wiring harness is wrapped in weather tight encasement to avoid any weather or heat damage, far exceeding any original OE harness offered today.  Their most popular kit is the California legal, CARB version that is emissions legal in all 50 states. Howell also offers full line of “off road” level harnesses for those applications that do not require emissions related components. Best of all, each harness kit is backed by a money back guarantee so you know it’s a quality parts that will deliver years of service. The kits also all utilize the OBDI GM diagnostic capabilities so a customer can scan or perform non-scan code access for troubleshooting

Part Numbers and cost of the kits:

Off Road Versions

• #K247JW360 $1400.00
• #K247JW401 $1400.00

California smog legal version CARB E.O. #D-452-2

• #K247JPV8W360 $1500.00
• #K247JPV8W401 $1500.00

Click here to view our full lineup of Jeep products.

To learn more or to order your conversion kit or harness, contact Howell EFI at www.howellefi.com or call (810) 765-5100.

For fans of the classic ’55-’74 Toyota Landcruiser, replacing the troublesome carburetion system with state of the art electronic fuel injection required a custom build that could end with questionable results. Enter Howell EFI who has come to the rescue with a turnkey (literally) throttle body fuel injection conversion kit that upgrades the engine system of the 3.9L engine replacing the troublesome carburetion system with electronic fuel injection. This is a highly desirable upgrade for fans of off road operation who know well the advantages of fuel injection over carburetion. Specifically, fuel injection delivers better cold starting, improved MPG, drive-ability the ability to attack any angle without the fear of fuel loss due to fuel starvation (a common issue with carbureted engines.).

The “on-road” kit (part number is #K247T) the kit is made up of almost all GM TBI parts and includes the following:

• GM Throttle body
• Toyota intake manifold adapter plate
• Wiring Harness
• MAF Sensor, coolant sensor, oxygen sensor
• External fuel pump & fuel filter, fuel pump block off plate
• GM ECM (computer) and calibration prom set-up specific to the F or 2F
• Full installation instructions and trouble shooting guide

The result is a Plug and play system that will completely replace the factory carburetion system and includes a GM computer “tuned” specifically for this application. As with all Howell EFI systems, the wiring harness is wrapped in weather tight encasement to avoid any weather or heat damage, far exceeding any original OE harness offered today.  Howell also offers full line of “off road” level harnesses for those applications that do not require emissions related components. Best of all, each harness kit is backed by a money back guarantee so you know it’s a quality parts that will deliver years of service. The kits also all utilize the OBDI GM diagnostic capabilities so a customer can scan or perform non-scan code access for trouble shooting.

Click here to view our full lineup of Toyota Landcruiser products.

To learn more or to order your conversion kit or harness, contact Howell EFI at www.howellefi.com or call (810) 765-5100.