eaglescout526

When a sensor goes out of spec, the ECU will make the engine act up. Otherwise no these engines run really solid.

Factory Service Manual is the way to go for all repairs. The TBI book I mentioned that you got will greatly help diag the rich situation as will an REM. The TPS can be out of wack and causing it to run rich. Check the vacuum lines to the MAP sensor on the firewall. If any of them are cracked or damaged, the MAP will feel the loss of vacuum power from the intake and dump fuel into the engine thinking it is starving for fuel. The TBI book will help you out greatly with the sensors and what their specs should be.

Perhaps the linkage is off in terms of the actual gear location on the T-case.

Probably has to do with how much it can carry. Not sure if that code is for Metric-ton package or not.

Lol YJ I understand why. The front axle is still supported by leaf springs. The JKU is just bigger.

*X1 TRIM STYLE X1 - CLOTH BENCH -YY 131 Zone 31-Boston 1AA U.S. Dealer Retail 3BK Customer Preferred Discount 5AM Largo Tracking 5KN Metro Cars of Detroit ADL Skid Plate Group ALN Body Color Bumper Group APA Monotone Paint BAQ 61 AMP ALTERNATOR BCX Dual 700 Amp Maint. Free Batteries BGA Power Front Disc/Rear Drum Brakes BJA STD DUTY FRT DISC BRAKES BKP 10x2.5 Rear Drum Brakes CBA Straight Back Bench Seat CKA Carpets - Floor and Cargo Area CSR Passenger Assist Handles DGB All 4-Speed Automatic Transmissions DGS 4-Speed Automatic AW4 Transmission DHA Lock-Up Torque Converter DHN Command-Trac Part Time 4WD System DHT Elec,Shift-on-the-Fly,P/Time T/Case DJH 230MM Front Axle DMD 3.55 Rear Axle Ratio DRJ 175MM Rear Axle EAA All Engines EAF ALL FUEL INJECTED ENGINES-GAS ERB ENGINE - 4.0L I6 MPI GAS GAC Tinted Glass Windows GBB Tinted Windshield Glass GCB Front Door Tinted Glass GEH Fixed Door Vent Glass GFD Rear Sliding Window GNA Rear View Day/Night Mirror GRZ Left Remote Mirror GSZ Right Remote Control Mirror GTZ Manual Remote Mirrors HCD Do Not Use - See HCA JAA Instrument Panel JAZ DO NOT USE - See JP, KA classes JBD BEZEL-I/PANEL CLUSTER - BRIGHT JCA 85 MPH Primary Speedometer JHA Var Intermittent Windshield Wipers JJA Cigar Lighter JKB MOPAR Hood Lock K2X STRIPE/BADGE/MOLDING/COLOR K3T STRIPE/BADGE/MOLDING/COLOR KKG LAF Seat Belt Alert-Driver Seat only LBC Glove Box Lamp LCJ DOME/READING LAMP B-PILLAR LMA Halogen Headlamps MB1 Black Front Bumper MBJ Black Powder Coated Front Bumper MDA Front License Plate Bracket MFG Body Color Headlamp Bezels MHA Black Windshield Moldings MMC Rear Door Solid Window Insert MMG Belt Moldings MMK Lower Grille Surround-Painted Silver NAA Federal Emissions NBA LIGHT DUTY CYCLE NBK EVAP Control System NDA Catalytic Converter NF5 Fuel Tank - 23 Gallon PY3 Classic Yellow Clear Coat QY3 Classic Yellow Clear Coat RAA All Radio Equipped Vehicles RAB AM/FM Radio RCD 4 Speakers SBA Power Rack and Pinion Steering SCE Alcantara Wrap Steering Wheel SFA Standard Duty Shock Absorbers SGA Rear Shock Absorbers TAA All Tires TAE MUD &&&& SNOW TREAD TBB Full Size Spare Tire TBM Tire Carrier Winch TMW P265/60r18 BSW A/S All Terrain Tires WJM 15X7.0 Chrome Wheels XBS Pickup Box XEE Fuel Tank Skid Plate Shield XEF Transfer Case Skid Plate Shield XEU Front Suspension Skid Plate XFA -35F Protection Anti-Freeze YAA Build To U.S. Mkt. Specifications YGB 1 Additional Gallons of Gas YGG 9 Additional Gallons of Gas Z01 Rear Spring Group I Z5A GVW/Payload Rating Z66 Left Front Group XV Z85 Right Front Spring Group XIV Build date 3/19/89 JM62

Might be right about this, still have some mystery vibrations going on, not sure if its because 30 year old truck or something else to replace that I can't seem to pinpoint on replacement. I find my long bed incredibly easier to park than say a full size truck. I would imagine short beds are a quick easy turn in.

TPS adjustment sounds to be in order. The TBI book will tell you how to do that and its specs on where you want it to be in terms of voltage output to the ECU. NGK plugs are fine.

Well done on the cut.

Awesome! They're good but time consuming but worth it.

I know its been a bit since my frosted flake chicken post but has anyone else besides 89 MJ tried it?

Nope, been gathering NOS parts and such. I am looking at hopefully May for chunk to come and reside here. That's if everything goes to plan.

Currently working with @CoastChief on these(he offered to help). He's currently busy with life, making moldings and other top secret stuff. Supposedly my sister knows someone but I have not asked her yet. Trust me, I have some labels that should be reproduced too like the VIN barcode labels on the radiator support.

Oof, 91 2.5L, out of my forte. But all I can offer is cruisers tips like above, check your grounds, improve those grounds and move from there with diagnosing and probing some wires for power and such.

Back from Pete's post on the relay harness, these are in the works.

I never ever EVER thought I would see an automotive blurb mention the N64.

Reading that is what makes me wish I wasnt so damn illiterate to older tech. Ive learned quite a few things from the popular youtube channels that restore old computers but not enough to know if it is possible or not to recode those chips.

Indeed it does. I am uploading pics of it right now.

So I made a sacrifice for the sake of info but I took my later style board with the ceiling dome and removed the board and uncovered the chip that had a printed tape with numbers on it to look at the chip It is a Phillips chip: TEA 5500 228 98 HSS 9144 6

Oh yeah. FCC stuff. I am interested in the Camaro one very much, I just need to find one.

Couldnt we make something today using the modern tech we have to fit in those little housings? I mean I find it odd that the modules got bigger as time went on until full integration into the ECU but I have an HO module and the board it long and skinny and I have been searching for something that would just fit into the XJ housing.

The chips in the remotes and the chips in the module need to have matching numbers. Otherwise no there really isnt a way to pair them. If I had to take an absolute educated guess, the chips were probably coded with numbers via an EPROM machine or something like that. A lot of this info from the AMC|Jeep era is lost to time and not a lot of info was shared nor documented unless someone worked for the vendor or for Jeep. Renault was the company that first started the keyless entry fad and there might be more info from them but I did a quick search a while back and got nothing back.

Youtube works just as well lol.

Those are iOS format videos. 89, might I suggest sending the videos to either OneDrive or goggle drive and share the link with us. Usually works best for nonstandard video formats and becomes more friendly to view on all platforms.