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One Size Does Not Fit All

A custom wiring harness and kit are the only way to go with Electronic Fuel Injection conversions.

Not all vehicle builds are the same. That’s why they call them customizers, right?

The fact is that when converting an originally carbureted engine over to fuel injection, there are man upgrades that are required to make it work properly. Electric radiator with thermostatic controls, fuel pump relocation to the gas tank and exhaust oxygen sensors required to make the fuel injection operational all require a custom wiring harness with the right fittings and the proper length wiring to connect it all together. No “cookie cutter” conversions kits could possibly do the job.

“We see a lot of online conversions kits that claim to be a one size fit all solution for folks converting their cars to electronic fuel injection,” said Matt Howell, President of Howell EFI.  “But the fact is that these are very complex systems that need special attention to the layout of the wiring harness and the right matching components. We spend a considerable amount of time on the phone during the order process to make certain every piece of the kit is better than OE spec.”

Howell wiring looms utilize better than original equipment wire. The individual connectors used are exactly the same as those used by the original manufacture to ensure perfect attachment to the assigned component each one labeled with white tags to make for trouble-free installation. Best of all, when ordering a Howell EFI conversion kit, everything is included. Case in point for the classic Jeep carb to EFI change out, the kit features components like a new Throttle Body and computer module specifically programmed by Howell to the requests of the consumer. It is literally turn key!

“We have people who call in thinking this is a simple process because they have done some research online or actually bought a cut-rate conversion kit thinking that they had everything they need for the job,” said Troy Brown, Howell EFI Tech Director. “But it becomes painfully obvious that without attention to these details, the system will either not run at all or it will start but not deliver the performance they expect. We get too many customers who spend good money only to find out that the discount system was a total waste of time. We spend a lot of time to get it right and an equal amount of time researching new and updated systems either to enhance our existing systems or expand out coverage to include new models.

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

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Jeep EFI Upgrade Tips

Howell EFI Conversion Kit Helps Kick The Carb!

No vehicle on the road  (or off road) benefits more from swapping from a classic carburetor to electronic fuel injection than a Jeep After all, eliminating those angle sensitive float bowls that can starve an engine for fuel and creating an engine system that can adjust to the altitude of the climb by richening and leaning out the fuel delivery is every Jeep lover’s dream.

Howell EFI offers eight different kits for most Jeeps built between 1982 and 1993 that originally came with carburetors. Best of all, for the street-driven Jeeps, the conversion kits include full emission compliance within strict Air Resources Board mandates. That means owners will never have a problem with the local regulators when checking emissions compliance.

“The Howell EFI conversion kit integrates the critical charcoal canister and the EGR systems and eliminates the need for the air pump and other engine cluttering components,” stated Troy Brown, Howell EFI Tech Director. “What we do recommend is that owners who install this kit go on our website and print out Air Resource Board Executive order D452 and keep this two-page document in their Jeep. This document shows that our system is emissions complaint and should handle any issues they encounter.”

Installation Tips

The Howell EFI conversion kit includes everything you need to install the kit including the GM Throttle Body, reprogramed computer, high flow electric fuel pump, fuel filter, MAP sensor, all hardware, clips, mounts and most importantly, the custom factory-look wiring harness that uses better-than-factory components and wiring. Howell estimates that most of their Jeep conversion kits will take between 8 and 10 hours to install depending on your level of skill and the condition of your Jeep.

Key points to the installation include modification of the fuel system. Fuel injection systems require both a fuel delivery line and a return line, both running the length of the vehicle from the fuel tank to the engine. The recommendation is that this line be 5/16-inch diameter line, either braided steel or hard line. Rubber fuel line or steel line, if so desired, should be used but when using steel line, small sections of rubber hose are allowable around the new fuel filter and fuel pump to make them easy to service when needed. Many owners choose to mount these parts inside the transmission protection pan to avoid the buzzing noise notoriously emitted by electric pumps. Mounting the pump with some kind of rubber foam spacer where it touches the pan will keep the noise to a minimum.

The MAP (Mass Air Pressure) sensor supplied with the kit is a key component to proper operation. Howell EFI offers two types; one that can be simply installed off the TBI unit with a stiff piece of rubber hose or a second type that must be mounted in a downward facing angle with vacuum pointing towards the ground and the sensor mounted above the TBI unit itself on a bracket or the firewall. When reviewing your instructions, the MAP mount for your component will be noted.

Your Jeep’s computer is located within the interior behind the glove box.  The dashboard on the passenger side must be loosened to allow for removal of the glove box. Once it is removed, the computer is easily located. Two nuts located on the engine side of the firewall must be removed to release the computer. Once it is free, gently remove the original equipment wiring harness junction from the computer.

The CTO (Coolant Temperature Override) switch is mounted on the engine block just below the intake manifold. It will be retained for any conversion and must be working properly. These switches are notorious for leakage, so if yours is showing its age it must be replaced. In addition, the original engine block mounted mechanical fuel pump will be removed and replaced by the block off plate supplied with the Howell EFI kit. The original pump rod stays in the block or the engine or oil pressure will not be correct. Make sure that the Howell plate is well sealed or oil leaks will occur.

For those looking for an overview of the system and owner experiences, YouTube-based instructional videos are readily available. “We have Jeep owners who go the full route and take out all of the original wiring loom and those that just tuck the unused original wiring away in the dashboard after heat shrinking the powered wires so they don’t ground out,” said Troy. “It is at the discretion of the builder as to how much or little they want to do – as with any vehicle modification. We honestly estimate the total install to not be longer than 10 hours from start to finish. The key is to study the schematic supplied with the kit and call our tech line if there are any questions.”

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

Carb to TBI conversion kits offered by Howell EFI:

  • TBI KIT: 1972-80 CJ 4.2L Offroad (CODE: CJ258)
  • TBI KIT: 1972-93 304, 360, 401 V-8 Jeep/AMC – Emissions Legal (CODE: K247JPV8)
  • TBI KIT: 1972-93 304, 360, 401 V-8 Jeep/AMC, Offroad (CODE: K247J)
  • TBI KIT: 1981-86 CJ 4.2L Offroad (CODE: JP258)
  • TBI KIT: 1987-91 YJ Wrangler Offroad (CODE: YJ258)
  • J 4.2L Offroad – Emissions Legal (CODE: JP1 258 CARB CA/CJ)
  • TBI KIT: JP1 Emission Legal Version CARB EO #D452 1981-86 CJ 4.2L Emissions Legal
  • TBI KIT: JP1 Emission Legal Version CARB EO #D452 1987-91 YJ Wrangler 4.2L Emissions Legal (CODE: JP1 258 CARB CA/YJ)

 

 

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Drive By Wire Installation Tips

With many of their electronic fuel injection conversions, Howell EFI includes a drive-by-wire (DTW) pedal assembly that must be mounted in the new vehicle to control the throttle. DTW first appeared in Corvettes back in 1997 with the dawn of the C5 models delivering far improved throttle response than the previous cable-driven systems. By 2005-2007 almost GM vehicles switched to the DBW wire system, which delivered these benefits to all LS-powered vehicles in their line up.  The beauty of this system for enthusiasts is that they can place the throttle pedal in any position they like as long as the wiring harness has enough length to reach the new positioning. In addition, they can be combined with traction control and ABS completing a state-of-the-art vehicle control system.

Without most recent installation, removal of the original throttle pedal was a terrific move since the years of wear on the original parts meant their future was limited. After unbolting the original mount, it was clear that the new DBW pedal system would not mount cleanly to the flooring and allow the pedal to move and operate properly.

After a quick call to the Howell Tech line, it was clear that a custom pedestal is required to properly mount the pedal.  Researching the program further, a call to Steve Rupp, editor at Chevy High Performance Magazine netted his solution, which delivered not only proper pedal operation but excellent toe-heeling ergonomics. Bottom line, creating a plate to mount the DBW system is as unique as you want it to be. Here is an example of the solution used for Rupp’s Camaro – yours could be different.

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Howell EFI: Announces Ecotec3 4.3 L V6 Direct Injection Harnesses Now Available

Howell EFI announces availability of 2014+ EcoTec3 4.3L V6 LV3-C truck wiring harnesses, allowing for transplant into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street Machines and more. For ease of installation, relays are included, wires are clearly labeled and terminated, and one ground serves the entire system. Harnesses also include 6L80/6L90 transmission functionality making the installation of these engines and transmissions as easy as possible.

Each new harness also features its own fuse block and a GM diagnostic connector. This allows customers to have their vehicles easily diagnosed and serviced at any repair facility utilizing the common OBD II port. Installation requires just three points of power at the battery, ignition, and fuel pump making these harnesses truly plug-and-play.  Harnesses are prepared to customer specifications, not a one size fits all approach, and each incorporates a rugged nylon or OEM style plastic covering and glued shrink tube. ECM/TCM reprogramming needed for the swap is also available. Each harness is proudly made in the USA with a Lifetime Guarantee.

According to GM, the 4.3L EcoTec3 V-6 has one purpose – providing budget-conscious customers a great standard engine. It’s large 4.3L displacement provides class-leading torque (305 lb-ft) and available towing (7,600 lbs.) for a standard V-6, while its aluminum cylinder heads and block saves weight. Its ability to operate on four cylinders under lighter loads helps improve fuel efficiency. Look to Howell EFI to make a transplant happen with ease.

Part #HVL435846T –  $900. Add $100 to harnesses requiring emissions connections.

Click here to view our Ecotec3 4.3 L V6 Direct Injection Harnesses.

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Howell EFI: Conversion Kits Help Kick The Carb!

Jeep EFI Upgrade Tips: Howell EFI Conversion Kits Help Kick The Carb!

No vehicle on the road (or off road) benefits more from swapping from a classic carburetor to electronic fuel injection than a Jeep After all, eliminating those angle sensitive float bowls that can starve an engine for fuel and creating an engine system that can adjust to the altitude of the climb by richening and leaning out the fuel delivery is every Jeep lover’s dream.

Howell EFI offers eight different kits for most Jeeps built between 1982 and 1993 that originally came with carburetors. Best of all, for the street-driven Jeeps, the conversion kits include full emission compliance within strict Air

Resources Board mandates. That means owners will never have a problem with the local regulators when checking emissions compliance.

“The Howell EFI conversion kit integrates the critical charcoal canister and the EGR systems and eliminates the need for the air pump and other engine cluttering components,” stated Troy Brown, Howell EFI Tech Director. “What we do recommend is that owners who install this kit go on our website and print out Air Resource Board Executive order D452 and keep this two page document in their Jeep. This document shows that our system is emissions complaint and should handle any issues they encounter.”

Pictured from top to bottom: Throttle body installed in place of carburetor, wiring through firewall, ECM installed in glove box, fuel pump and filter assembly. 

Installation Tips

The Howell EFI conversion kit includes everything you need to install the kit including the GM Throttle Body, reprogramed computer, high flow electric fuel pump, fuel filter, MAP sensor, all hardware, clips, mounts and most importantly, the custom factory-look wiring harness that uses better-than-factory components and wiring. Howell estimates that most of their Jeep conversion kits will take between 8 and 10 hours to install depending on your level of skill and the condition of your Jeep.

Key points to the installation include modification of the fuel system. Fuel injection systems require both a fuel delivery line and a return line, both running the length of the vehicle from the fuel tank to the engine. The recommendation is that this line be 5/16-inch diameter line, either braided steel or hard line. Rubber fuel line or steel line, if so desired, should be used but when using steel line, small sections of rubber hose are allowable around the new fuel filter and fuel pump to make them easy to service when needed. Many owners choose to mount these parts inside the transmission protection pan to avoid the buzzing noise notoriously emitted by electric pumps. Mounting the pump with some kind of rubber foam spacer where it touches the pan will keep the noise to a minimum.

The MAP (Mass Air Pressure) sensor supplied with the kit is a key component to proper operation. Howell EFI offers two types; one that can be simply installed off the TBI unit with a stiff piece of rubber hose or a second type that must be mounted in a downward facing angle with vacuum pointing towards the ground and the sensor mounted above the TBI unit itself on a bracket or the firewall. When reviewing your instructions, the MAP mount for your component will be noted.

Your Jeep’s computer is located within the interior behind the glove box. The dashboard on the passenger side must be loosened to allow for removal of the glove box. Once it is removed, the computer is easily located. Two nuts located on the engine side of the firewall must be removed to release the computer. Once it is free, gently remove the original equipment wiring harness junction from the computer.

The CTO (Coolant Temperature Override) switch is mounted on the engine block just below the intake manifold. It will be retained for any conversion and must be working properly. These switches are notorious for leakage, so if yours is showing its age it must be replaced. In addition, the original engine block mounted mechanical fuel pump will be removed and replaced by the block off plate supplied with the Howell EFI kit. The original pump rod stays in the block or the engine or oil pressure will not be correct. Make sure that the Howell plate is well sealed or oil leaks will occur.

For those looking for an overview of the system and owner experiences, YouTube-based instructional videos are readily available. “We have Jeep owners who go the full route and take out all of the original wiring loom and those that just tuck the unused original wiring away in the dashboard after heat shrinking the powered wires so they don’t ground out,” said Troy. “It is at the discretion of the builder as to how much or little they want to do – as with any vehicle modification. We honestly estimate the total install to not be longer than 10 hours from start to finish. The key is to study the schematic supplied with the kit and call our tech line if there are any questions.”

Click here to view our full lineup of Jeep EFI conversion products.

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

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Regardless of the Engine Transplant, Howell has You Covered

Currently Howell EFI offers wide-ranging GM-style EFI conversions for many applications and harness conversions for any GM V6 and V8 engine from 1985 to present. For anyone not doing a complete carbureted to fuel injection conversion, we also cover the transplant segment with 30+ years of vehicle applications.

As an adjunct to our wiring harnesses, we developed complete throttle body and multi-port fuel injection systems. We combine proven GM electronic components, Howell wiring harnesses, two and four-barrel TBI and TPI units. These systems offer GM closed-loop fuel and spark control, and typical GM durability and fuel economy. With extensive development on both big-block (454/502 CID) and small block (350/400 CID) engines, these systems are attractive updates for both hot rods, production carbureted vehicles, and off-road four wheel drive vehicles seeking both performance and fuel economy.

Whether you are looking to do a TBI, TPI, MPI, CPI, LTI (90’s & current LT1), LS, Vortec, or EcoTec3 EFI conversion or engine transplant, look no further than Howell.

 

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Howell EFI Announces Mopar TBI Kit Offerings

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 Mopar TBI kits from 273 to 440 V8 engines. 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.

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 Mopar TBI Kit Offerings.

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

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Howell EFI Announces 6.2/5.3/4.3 Ecotec3 Truck Harness Kits

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.

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Howell EFI Announces Ford TBI Kit Offerings

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.

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Howell Makes Ordering an EFI System Simple and Easy

Howell EFI, well respected in the industry for their plug and play EFI systems has earned that reputation for a reason. Their customer support team knows every question to ask to make certain that what ships out from Howell covers every possible base for a complete and easy to install system.

Here is a sample of a typical order taking conversation:

  • Wiring Harness was needed for 1971 Pontiac Firebird

Vehicle:

  • Engine ?  GM Crate engine – LS3 with 525 horsepower
  • Transmission?  Rockland Standard Gear six speed
  • Manual or automatic? Centerforce twin disc hydraulic clutch
  • Any cam changes?

Key order taking questions:

  • Where does the battery mount – underhood or trunk?
  • What kind of cooling fan arrangement do you have – single or dual fans?
  • Any smog requirements?
  • Eliminate speed sensor?
  • Are we providing the computer?
  • Do you have a core on the computer?
  • Where do you want to mount the control module – under hood, in the interior?
  • With belt system does that put alternator on top or down low?
  • Does the alternator have a four or two pin connector?
  • What about mass air flow sensor? Are we supplying the front two oxygen sensors? Length of the harness from passenger harness to computer mounting point?
  • Fuel pump to mount in trunk – this is normal for fuel injection conversions
  • Gold or Silver Blade in the throttle Body – signifies engine type.

Notes:

These engines require the drive by wire pedal – mounted on the firewall. Howell offers reprogramming of the computer control module if needed. Can be determined after the engine is up and running.

Each harness is well marked with each wire or component tagged to denote where it fits. The fittings are made to connect to the factory fittings so this is simply plug and play. Look to Howell EFI to make your order taking and conversion happen with ease. Link to video here.