/ /

1991 Jeep Wrangler with Ford 5.0 L EFI V8 Conversion

1991 Jeep Wrangler

Condition: Used
Make: Jeep
Model: Wrangler
Type: SUV
Trim: Base Sport Utility 2-Door
Year: 1991
Mileage: 166,000
VIN: 2J4FY19P1MJ122122
Color: Green
Fuel: Gasoline
Transmission: Manual
Drive type: 4WD
Interior color: Black
Vehicle Title: Clear
Item location: Asheville, North Carolina, United States
4-Wheel Drive, Convertible

Description for Jeep Wrangler 1991

1991 Jeep Wrangler with Ford 5.0 Fuel Injected conversion.

This Jeep began its life as a 2.5l four cylinder. It became a project to replace the anemic 2.5 engine with a larger v-8. So a 5.0 EFI from an early-90's Ford Bronco became the donor to put this vehicle back into better than new condition. The project is 95% done, ut does still have some minor items to complete before it can be considered road/trail worthy. The jeep is drivable, ut not streetable as the engine has a power loss problem at speed (see detail below) therefore the buyer will be responsible for arranging transport by tow or trailer. I have a towbar and tow lights available that I can include for a nominal additional fee if the buyer wishes to tow the vehicle himself. I can assist with tow set up. I do have a clean North Carolina title, owever the Jeep has not been registered.


1991 Jeep YJ Sport Model

Engine: 1991 Ford 5.0 EFI V8

Transmission: 5-Speed Model NV3550 out of a 2004 Jeep TJ

Clutch: Brand new 11" Ford Truck

Transfer Case: Dana D300 from Jeep CJ-7, esealed, lipped, nd double-stick mods

Rear Drive shaft: Custom CV style from Drivelines Direct.

Front Driveshaft: Custom 2-piece design

Front Axle: Stock Dana D30, pen differential with 4.11 gears

Rear Axle: Stock Dana D35 with new Yukon Spider Gears, pen differential with 4.11 gears

33x12 Tires on Incubus bead-lock style rims. Tires have approximately 1/4" of tread left.

3" body lift on 2" shackle spring lift, otaling 5" of overall lift


Brand new front Seats

Vinyl Top replaced in 2011

Tilt Wheel

Anti-theft system

Wired for trail lights (I have a set of unmounted 6" KC Daylighters that I will throw in for the winning bidder)

Custom front bumper with shackles is winch-ready. (I have a brand-new, till in box Superwinch Talon 9500 lb. that I will sell for an additional $300 to the winning bidder)

Custom rear bumper with hitch coupler and shackles.

Rough Rider Locking storage compartment behind the rear seat

Many new parts; here is a short list that I'm sure doesn't include everything:

Advanced Adapters Motor mounts and Transmission adapter

Rear CV Style Drive Shaft

3-core aluminum Radiator

Electric cooling fan & thermostat


auxiliary oil pressure and water temperature gauges

remanufactured power steering pump

water pump

flywheel, lutch, ressure plate, elease bearing, lave cylinder

Yukon D35 Spider Gears

front axle cable lock kit (replaced original vacuum lock that was problematic)

Entire Exhaust---Pacesetter shorty headers, atalytic converter and cross-over, nd TFX Cat-back system


EGR Valve, uxiliary air tube, GR Sensor, uel Pressure Regulator, 2 sensor


Ignition Coil, istributor Cap, otor, lug wires

The Good:

The V8 conversion is virtually complete; all the hard work is done. The conversion was done with the highest amount of care using pre-designed adapters and retaining 100% of the Ford engine wiring and emissions controls so that the vehicle can be recertified for your local emissions testing. Wire harness modifications done with weatherproof but splices and quality Weatherpak connectors. I will include a detailed wiring diagram of all connections so that any future electrical modifications can be easily performed.

The body is in very good condition for its age. There are no major dents or major rust, owever it could use repainting. It is currently an olive colored primer. There is a little surface rust where the paint has worn from the door sills. There are a couple small dents in the lip of the hood from a tow bar being pushed back against it. I had planned to repaint the Jeep to its original gloss black. There are no rust holes. The frame is solid with no rust holes or crash damage as well. The interior carpet has been removed and the interior rhino-lined, hough that has worn through in a few spots and could be touched up. The Driver and Passenger seats are brand new black vinyl Bestop Trailmasters. The folding rear seat is in good condition with no rips or tears, ut has some discoloration from age.

The bad:

As stated, he Jeep is drivable at low speed for short distances, ut lacks power on the road. I have spent countless hours and dollars trying to diagnose the issue but have not found the correct solution. Ultimately, t probably just needs to spend a little time with a qualified Ford Mechanic.At this point I have spent nearly 2 years working on this project and have way more money into it than I will ever see out of it. I just don't have the time to work on it anymore, o rather than have it sit and not go anywhere I am ready to cut my losses and sell the project. I believe that someone with experience with these early '90's ford 5.0 EFI engines can make this thing purr. The enginetest good, as steady vacuum and 120-130 PSI compression on all cylinders. It does not smoke or burn oil. The PCM is throwing codes for Power Steering Pressure Sensor, SS, nd HEGO sensing lean condition. The power steering pressure switch may be bad and there is no VSS presently connected. I believe the lean condition is related to inadequate fuel delivery.

Known Issues:

Lack of power at speed

slight oil leak from rear engine seal

Occasional antifreeze leak from front of engine--doesn't happen always, aven't been able to trace

Slight gear grind when shifting quickly from 1st to 2nd. All other gears are fine.

speedometer is not hooked up

Engine light on for codes explained above.

Tachometer reads 2x actual engine RPM, s it is a 4-cylinder unit but is wired to the 8-cylinder engine.

Stock oil pressure and temperature gauges could not be connected to the Ford sensors, o auxiliary gauges have been fitted. Ammeter, lock, nd fuel gauges work fine.

With a little bit of work I believe that this Jeep can make an excellent road or trail rig. You will not find many v8 jeeps in this year model, s the factory only built 4's and 6's. The advantage of this year model over the older Stock V8 CJ's is the galvanized body, odern sealed electronics, nd fuel injected engine. So once the minor issues are fixed you will have something truly unique, owerful, nd reliable.

$500 deposit via Paypal required within 24 hours of bid close. Balance required within 7 days by cash or electronic transfer. I will not release the Jeep and sign over the title to the new owner until all funds have been paid. Jeep must be picked up by new owner within 20 days of bid closure or the deposit will be forfeited.

Thank you for looking and good luck with your bid.