FAST EZ-EFI Fuel Injection Throttle Bodies For 1972-1991 Jeep 6-Cylinders


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There are few more prolific engines than the ol’ I-6 258 cubic-inch straight-six powerplant. Offered in Jeeps 1972 all the way until 1991, the 4.2-liter engine is one of the brand’s most popular, and is used by Jeep enthusiasts all over the world today.

Now, with these people in mind, FAST (Fuel Air Spark Technology) is offering its state-of-the-art fuel injection and management system – the FAST EZ-EFI – for them! The self-tuning system is an ideal fit for Jeep lovers looking to update their original straight-six while making it significantly easier to start, drive and maintain.

Here’s the original press release:
Memphis, TN – The latest evolution of the entry level, self tuning Jeep EFI system from FAST maintains all of the functionality and ease of use of the original, with improvements to the throttle body, hand-held, electronics and harness.

The next generation of the world’s simplest self tuning fuel injection system for older Jeep applications is here. The FAST EZ-EFI Jeep kit is designed specifically for 1972-1991 Jeep CJ/YJ 4.2L, 6-cylinder applications and includes a linkage kit, enabling plug-and-play compatibility with Jeep accelerator cables and transmission kickdown cables. The Jeep systems also feature a new die cast and black powdercoated, two-injector, four-barrel throttle body with an integrated fuel rail. It provides even better fuel distribution and more airflow than the original. Based on the EZ-EFI 2.0 Fuel + Ignition design, it is made in the USA and utilizes a secondary idle stop to help with idle adjustment.

A color touchscreen hand-held also features a new-and-improved Setup Wizard. The intuitive program asks a few basic questions and then the EZ-EFI Fuel System tunes itself as the user drives either on the highway or off-road. No laptop or previous tuning experience is required. The hand-held itself features a variety of display dashes, a clean and easy-to-use interface and an LED indicator that can alert users to any error (including overheating) or be used as a shift light. Finally, an updated wiring harness features premium loom, added protective fuses and a streamlined design, while the ECU hardware has been upgraded to provide added protection against electrical/ignition noises and hardware damage. FAST EZ-EFI Fuel kits for Jeep applications are available in throttle body injection designs with or without fuel pumps.

Part Number: #30294-06KIT(Jeep Base Kit); #30296-06KIT (Jeep Master Kit, In-Tank Fuel Pump); #30295-06KIT (Master Kit, Inline Fuel Pump)

Features & Benefits:

  • Includes linkage kit for compatibility w/ Jeep accelerator & trans kickdown cables
  • 2-Injector, 4-barrel throttle body provides better fuel distribution & flows more air than original
  • Setup Wizard asks a few basic questions & tunes as user drives w/out requiring a laptop
  • Easy-to-use hand-held features a color touch screen w/ multiple display dashes & an LED indicator for a wide variety of uses
  • Updated wiring harness utilizes premium loom, protective fuses & a streamlined design
  • Offered in throttle body injection designs with or without fuel pumps

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Kevin Shaw

Editor-in-Chief – kevin.shaw@shawgroupmedia.com Kevin Shaw is a decade-long powersports and automotive journalist whose love for things that go too fast has led him to launching Mopar Connection Magazine. Almost always found with stained hands and dirt under his fingernails, Kevin has an eye for the technical while keeping a eye out for beautiful photography and a great story. He's also the co-author of "The Chrysler B-Body Restoration Guide."

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