Gen III+ In-Tank Fuel Pump


Jeep CJ Universals, 1972-1986

In-Tank fuel injection pump for CJ Jeeps

Kit FSK-CJ, in-tank fuel pump for 1972-1986 CJ Jeeps with inline filter

The Jeep conversion industry has seen various evolutions of fuel system modifications to accommodate modern fuel injection engines, including the installation of external fuel pumps and the installation of various variable pressure regulator systems. None of these methods are as simple, cost effective or desirable as this method.

Option I: With Pressure Regulator (pictured)

Included in this kit is a pressure regulator / filter combo that will supply ~58 psi to the fuel injection rails through a return-less supply line. This is for Gen. III+ engines that require a regulator external to the GM fuel rail.

Option II: Without Pressure Regulator

Identical to the above kit, except the regulator is not included. This kit is for Gen. III engines that already have the factory regulator integrated into the fuel rail, typically many 1997-2002 GM LS / Vortec series engines. You will notice the presence of a diaphram style regulator and its associated return line, in addition to the always-present supply line. Check your engine for applicability.

Applications & Compatibility


This is an example of one style of regulator on an LS style engine. These earlier style fuel rails that feature their own regulator will always have a supply line and return line.

The Fuel Kit

This kit is designed specifically for 1972-1986 CJ Jeeps and utilizes the factory or replica Jeep fuel tanks.

Novak’s Gen III+ fuel pump kit will cleanly upgrade the original Jeep fuel sender to an in-tank pump assembly that provides the higher, ~58 PSI pressures required by GM Gen. III+ engines.

Jeep CJ Fuel Tank Identification

There are three commonly available tank variations for the 1972-1986 CJ universal Jeeps:

  • The stock 15 gallon tank was available either as a steel or plastic version. Dimensions are approximately 16” long x 23” wide x 10” deep.
  • The stock 20 gallon tank was available in the 1980's era as a plastic tank only. Dimensions are approximately 11.5” deep. The key identifying feature of this tank is the angled corner for exhaust clearance on the driver's side, front of the tank. In essence the corner is “knocked off” for exhaust clearance. The skid plate is bolted to the frame with no extensions. We generally lean towards this tank as our preferred unit.
  • The common aftermarket 21 gallon tank is also plastic and the same footprint as a 15 gallon tank but 5” deeper at approximately 16” long x 23” wide x 13.75” deep. It features drop down skid plate extensions to allow for the increased depth and capacity.

In summary, if your tank is steel, it's a 15 gallon tank. And, it will have been obvious if you've owned the Jeep and done fuel fill-ups on it. 20 & 21 gallon tanks are less obvious via fill-ups, but the 20 gallon tank has the angled front corner, and the 21 gallon tank has skid plate extensions.

There could be other tanks or aftermarket fuel cell possibilities on your Jeep, and these will have to be addressed on a case by case basis.

Installation Requirements

Installation requires that the fuel tank be lowered (and preferably nearly empty) and that this replacement fuel module replace the factory version.

Any person or shop working on any factory or conversion vehicle fuel system must consider that any open flame or electrical spark or tool spark in the proximity to fuel and especially fuel vapors can cause massive damage to life, health and property. Improper electrical connections can spark, overheat and ignite fuels and their vapors. If the installer is not qualified to work on a vehicle fuel system, they should seek the consulting and installation services of someone who is competent in this area.