Jeep Renix Troubleshooting

Jeep Renix Troubleshooting

Also please check out the statistics and reliability analysis of Jeep Cherokee based on all problems reported for the Cherokee. com - The ultimate Jeep forum. Accurate Engines sells remanufactured Jeep Engines including 4. I recommend the following procedure as a maintenance precaution to insure this is eliminated as a possible cause now and in the future. 5L I4 2WD AX-4 4 Speed Follow me on Facebook and Instagram! https: Jeep Wrangler Died - No Start Troubleshooting - Sad Maintenance. The power increase was also noticeable. I assume you mean a 1987 Jeep Cherokee since that is the first year the 4. Click here to DOWNLOAD Jeep Cherokee XJ Ignition System 2. One of the easiest modifications on our beloved 4. We've undergone a big change here at The Repair Connector Store with a whole … Create Your Account. Well it ran amazing but only for one day. My Renix was equipped with cruise control, so I used the VSS that was mounted inline on the speedo cable under the dash. Jeep (22) Land. 0 NEVER had TBI in a Jeep. On top of all that, Renix jeeps make about 15 hp less than any jeep after 1991. DESCRIPTION. But when I unplug vacuum line from map sensor. Heater blows luke warm most of the time, sometimes it will blow hot. kinda new it was weak but anyways, got new one, put it in it works BUT (Renix electrical guys please chime in) now it doesn't stop priming it just keeps on running. I am going to continue to troubleshoot, but i simply loosened the rocker bolt for the exhaust valve and boom. If you can't find your part number, there is no need to visit an auto repair shop, get in touch with one of our representatives on the phone or start a chat with us, we can help!. 1234567890123456789012345678901212345678901234567890123456789012123456 1 2345678901234567890123456789012 1234567890123456789012345678901212345 6. firstly, I have read many of the articles pertaining to emission problems with the 2. High performance Brown Dog Offroad motor mounts, motor mount lifts, and engine brackets for Jeep 2. Jeep Touch Up Paint Pens, Spray Paint, and Other Jeep Paint Products. Jeep ZJ brake booster, master cylinder, proportioning valve = may need for disc conversion. Didn't seem so steady in snow. Jeep Liberty Diesel Diy Troubleshooting Guide PDF complete. 6L Jeep Stroker Engine: Built to be a direct bolt in for any year Jeep that has a 4. The Renix electronic ignition system consists of a solid-state Ignition Control Module (ICM), a distributor, a Top Dead Center (TDC) sensor, and an Electronic Control Unit (ECU). 0 liter six-cylinder engine provided good acceleration from low speeds in Jeep Wranglers and Cherokees for years, with high torque at low engine speeds. My Jeep has been doing this ever since I bought it back in May of this year. Information On Car and Truck Repair, Parts and Services New, Used and OEM Automotive Parts For Do It Yourself Car and Truck Repair. By Shad Ahlstrom. Slick as in No smarts. 0-liter from 1987 to 1990 is known as the Renix engine which is arguably harder to diagnose if a sensor goes bad. As more and more power enhancements are making their way into the Jeep 4. Possible causes input please? × Help us help you. 0 Ltr Engine or. Troubleshooting a NO Start XJ / MJ. 89 jeep renix idles high but when in gear and I hit the gas, she stutters and feels like it's out of gas won't go. kinda new it was weak but anyways, got new one, put it in it works BUT (Renix electrical guys please chime in) now it doesn't stop priming it just keeps on running. 0 not starting problems I have got an 89 xj that i am having problems getting running. The sensor cost $300, but I haven't had any problems with stalling or slow starting since, so it was well worth the price. In this video we show you how to give your '88 and older Renix Jeep Cherokee XJ a nice boost in performance by upgrading to an 89/90 ECU. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. JEEP CHEROKEE Renix 4. 1991 - Chrysler Corporation (then the owners of the Jeep brand replaced the Renix control system with OBD-I-compliant control electronics, the Chrysler HO EFI). so, I’m having a real problem here. 5 L four-cylinder engines. Jeep Renix USA has 1,377 members. All For Sale or For Trade Posts. 0L XJ Cherokee benefited from multi-point fuel injection. I am going to try and see if it holds water at some point. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. Mine seems to have gotten damaged somehow. in the XJ is rated at 190. except certain 1987 Renix models which have both 2" as well as 1" frost plugs. You'll find everyone here to be friendly, and most importantly, drama free!. 1987 was when the Renix fuel injection system was introduced. Advertisement. And now, we present hat you need quickly. Jeep Cherokee owners have reported 13 problems related to gas recirculation valve (egr valve) (under the engine and engine cooling category). We recommend experimenting with LED placement to minimize. From 1987-90, the 4. We've undergone a big change here at The Repair Connector Store with a whole … Create Your Account. 0-liter from 1987 to 1990 is known as the Renix engine which is arguably harder to diagnose if a sensor goes bad. I decided to wait until my Renix Engine monitor arrived to do any more trouble shooting. I swapped the relay and nothing jumped the relay and it turned on. 0L RENIX Fuel System Diagnostics. When the time came for me to get a vehicle, I picked up an old Cherokee. As a solenoid shorts out, it loses is ability to create a magnetic field to push the core. Im wondering if there are computer codes on an 89 jeep cherokee. Covers procedure on diagnosing problems and testing 4. If anyone cares I will post progress and a fix when I find the problem(s). The t-body bore is the one of the biggest differences in the Renix and H. 1989 Jeep Cherokee Repair Manual Pdf 1987 Jeep Cherokee Xj Repair Service Manual Dlfiles24 1987 1990 Renix System Jeep fi Notes Notes Title 1989 Jeep Fi Manual Author Frank Created Date. An eBay Wiring harness and ECU tool made short work of that “no run state” and the project rolled on. 1989 Jeep Comanche Pickup. 0L ( XJ ) limited trim. If you are still having problems and need 'word for word' advice then you really should get yourself a Factory Service Manual. A defective unit is one of the most common no start or random stalling problems with the Bendix / Seimens Renix systems. 89 jeep renix idles high but when in gear and I hit the gas, she stutters and feels like it's out of gas won't go. Shop for discount Jeep Cherokee Intake Manifold here. 5 ltr Engine Remanufactured ECU with Auto Or Manual Transmission. all you need is the radiator from a 91 to 96 xj, & a barrel hose connector. 5 std trans. I have a 1990 renix jeep cherokee with under 125xxx miles 4x4 larerdo. my 1989 jeep cherokee with the inline six cyl. Stroker combinations. It does have a lot of miles on it. Titan Engines. No exhaust. TeamADW installation not available. Moses, your website has been extremely useful for me while working on my 1989 Jeep YJ Wrangler 2. 0 inline 6 cylinder engine and AW4 automatic transmission for sale. Im having problems with starting when its warm. How do you manually pull codes from a 1989 jeep cherokee? My 1989 cherokee has been NOTHING but problems and frankly I am sorry I bought the thing. IGNITION SYSTEM - 2. bllsht wrote: > Renix was 87 - 90. I have tried TPS set it to dealer recommended setting of. Once the ignition switch is turned off any codes generated are lost, thus making it difficult to detect intermittent problems. From material by Peter Stern; with thanks to Frank Swygert The Jeep 4. View our troubleshooting clinic archive here. It's worn off clutch material and since the CPS is a magnet, the metal sticks to the tip of the CPS causing a reduced voltage signal. Leaks developed around the oil filter and oil pan. Troubleshooting/Problems mavis told me my emergency brake line is sticking when pull the brake and said that is damaging my regular brakes they had chaneg pin on the brake did not show where if any know how i can fix would love to do it learn how fix my own jeep now 2007 jeep grand cherokee v8 4. One located at the rear of the vehicle and one small one at the front where I believe the oil drip pan is located. Great job, sir. Whether it is the rugged Jeep Wrangler, or the more comfortable, family friendly Jeep Cherokee and Grand Cherokee, the Jeep brand lives up to its reputation. Jeep designers based its body, styling, and suspension on the Cherokee, which had been introduced for the 1984 model year. crank position sensor problems!what to do? Those years the electronics were called "Renix" and the. You currently have 0 posts. I have a 1990 renix jeep cherokee with under 125xxx miles 4x4 larerdo. 6L Jeep Stroker Engine: Built to be a direct bolt in for any year Jeep that has a 4. This will be a bit of a long post, but hopefully some RENIX owners will take the time to read and weigh in. The last three digits of the ECU's to look for are 428 and. ) 1986 – Renix TBI available on Jeep 2. 1990 Jeep Cherokee Renix 4. Jeep Cherokee, Wagoneer and Comanche Haynes Owners Service, Workshop and Repair Manual 1984 - 2001 Get Other Jeep 4WD Repair Manuals click here NEW softcover. 0 Liter engine. 89 jeep renix idles high but when in gear and I hit the gas, she stutters and feels like it's out of gas won't go. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. it will not rev above the idle speed. 5L with Renix Electronic Ignitionservice manual If you have any problems downloading file, please ask in Q&A section Back to top. I have a 1990 renix jeep cherokee with under 125xxx miles 4x4 larerdo. My Jeep has been doing this ever since I bought it back in May of this year. We stock over 50,000 models of quality used JEEP ECMs, JEEP ECUs, JEEP ECCs. 1997 was the introduction of Mopars true obdii system. How-to: Troubleshooting Jeep Fuel Injected MPI Engines Overview: Jeep 'PCM' and Multi-Point Fuel Injection Systems AMC electronic fuel injection for Jeep engines dates to 1987. Sticking valves is very common and happens to all aged engines. 5L TBI Four-Cylinder Engines In 1986, the AMC 2. This Jeep was recently smogged 3 months ago when registered, it has a 4” inch BDS front suspension lift, rough country adjustable track bar, 33” BFGoodrich tires 12. Jeep Cherokee was a full-size SUV, one of the first compact SUVs and now is crossover SUV manufactured by FCA US LLC since 1974. Nah - I'm just a glutton for punishment. 5L I4 2WD AX-4 4 Speed Follow me on Facebook and Instagram! https: Jeep Wrangler Died - No Start Troubleshooting - Sad Maintenance. It is in good condition. Since your Jeep has the old RENIX (Renault) system it could be anything but I have seen a few computers with failed solder joints inside as well as broken wires on the pick-up coil inside the distributor. Find out what they're like to drive, and what problems they have. The Renix control system prior to 1991 can be tested only with Chrysler's DRB tester, and the diagnostic test modes for 1989 and later engines with SBEC controllers differ from those provided for 1988 and earlier models. but was OK. Whether you have a Jeep Commander, Grand Cherokee, Wrangler, etc. This manual is available through your local Chrysler, Jeep ® or Dodge dealer. Join thousands of other Jeep fans as we tackle Wrangler problems and more. 0L XJ Cherokee benefited from multi-point fuel injection. The highest quality differential parts available for race, offroad, or street. 0 liter six-cylinder engine provided good acceleration from low speeds in Jeep Wranglers and Cherokees for years, with high torque at low engine speeds. Shop for discount Jeep Cherokee Intake Manifold here. Fuel Filter/Fuel Pressure Regulator Replacement on 5. i need some help iv been back and forth with this. Building a Jeep 4. 0L engine from the factory. I decided to wait until my Renix Engine monitor arrived to do any more trouble shooting. Everything is easily diagnosible with a multimeter, but you need to have an idea of what affects what since there are no codes. Seeking information regarding Jeep Wrangler Oxygen Sensor Location? you are right below. Search for my posting of "What is the max spark plug gap that a Blaster SS coil will fire?" for additional ideas. One of the easiest modifications on our beloved 4. This will be a bit of a long post, but hopefully some RENIX owners will take the time to read and weigh in. Hey Dirtybird, I looked into this subject a bit. I have used it for testing just about everything on my jeep. The Jeep started and I was able to drive it for 20 minutes to get it fixed. It is located on the TB to the left of the tps, and has a right-angle plug on it. Everything is easily diagnosible with a multimeter, but you need to have an idea of what affects what since there are no codes. El Club de Diagramas es dónde los técnicos intercambian y comparten diagramas, manuales de servicio y todo archivo de información técnica útil para las reparaciones electrónicas. 0-liter from 1987 to 1990 is known as the Renix engine which is arguably harder to diagnose if a sensor goes bad. It has to be just right. I'm looking for what all is needed for a MT2500 to communicate with '87 - '91 Jeep 4. The 1986-92 Jeep Comanche (MJ) was an innovative pickup truck with strong engines, high capacities, and optional four wheel drive — using a unibody structure (albeit with a "uniframe"). power steering super seal I get a rubbing/screeching noise from the column when I make. From material by Peter Stern; with thanks to Frank Swygert The Jeep 4. 5L W/RENIX ELECTRONIC IGNITION 1988 Jeep Cherokee Distributors & Ignition Systems JEEP RENIX ELECTRONIC IGNITION 2. 244k miles. Jeep Renix Fuel Injection Manual ePub. 1989 Jeep Cherokee Idling, Stalling Problems. History Model years: 1986 - Renix TBI available on Jeep 2. By Old_Man When an XJ doesn't start, the first thing people tend to do is throw parts at the problem. El Club de Diagramas es dónde los técnicos intercambian y comparten diagramas, manuales de servicio y todo archivo de información técnica útil para las reparaciones electrónicas. 5 L four-cylinder engines. I have a 1995 Jeep Cherokee SE 2-Door, 2-Wheel Drive, 4. Sticking valves is very common and happens to all aged engines. Once it gets to running temp it starts to come on and it hasnt gone solid red yet. below the regular RPM or. It will not idle correctly. Jeep Wrangler 2. Instead of an obstacle, think of your engine replacement as an opportunity to upgrade your entire Jeep's performance. Worked as it should. I have used it for testing just about everything on my jeep. I recommend the following procedure as a maintenance precaution to insure this is eliminated as a possible cause now and in the future. The Renix EFI is AMC system. 0L/242 COMP Cams Parts and Accessories. If anyone cares I will post progress and a fix when I find the problem(s). If you are one of them and you need help, your best bet is to ask an Expert. 5L TBI: Cherokee, Comanche, Wagoneer, Wrangler. so i fill. The "soft" misfire, often called a surge, is commonly associated with fuel related issues. 5L with Renix Electronic Ignitionservice manual If you have any problems downloading file, please ask in Q&A section Back to top. Whether you own a Toyota, Mercedes, Lexus, Dodge or Volvo, we can replace or repair your faulty ecm and save you a lot of cash in the process. It is located on the TB to the left of the tps, and has a right-angle plug on it. When the time came for me to get a vehicle, I picked up an old Cherokee. It is nothing but problems. 0") throttle body, and a rather inefficient low port cylinder head. Any one actually know anything about renix era jeep cherokees? I have a 1989 Jeep Cherokee that is the biggest pos I have ever owned. Jeep Cherokee, Wagoneer and Comanche Haynes Owners Service, Workshop and Repair Manual 1984 - 2001 Get Other Jeep 4WD Repair Manuals click here NEW softcover. Model years: 1986 - Renix TBI available on Jeep 2. Ask a mechanic for help and get back on the road. 0 Renix Engine Have A History Of Any Common Problems Such As Bent Or Stuck Or Sticking Valves Cracked Pistons After A Over Heating Problem Please Keep In Mind That This Engine Has Over 280,000 Miles On It" Sticking and bent valves are two totally different things. 0 not starting problems I have got an 89 xj that i am having problems getting running. You're late for work, your jeep won't start, and now you're stressed out big time. Since your Jeep has the old RENIX (Renault) system it could be anything but I have seen a few computers with failed solder joints inside as well as broken wires on the pick-up coil inside the distributor. The Jeep Comanche (designated MJ) is a pickup truck version of the Cherokee compact SUV that was produced from 1986 to 1992. Shop for discount Jeep Cherokee Intake Manifold here. The electronic control unit in your Jeep Wrangler is a part of the vehicle's computer system. " It controls a variety of functions, including how your engine runs and the individual sensors that provide it with information. It shared the name of the original full-size SJ model, but without a body-on-frame chassis, it set the stage for the modern SUV. Mopar from 91 on. Photo of the moment:. I would like to share what I found and what was done to REPAIR the ECU. I don't need to get into other year models with RENIX motors and how they overheat. When i picked it up it had quit running on the previous owner while he was driving it. do NOT contact me with unsolicited services or offers. The Renix Multi-Point Fuel Injection (MPI) system, used on 4. Locks; Column Repair. I hate throwing parts at a car and hope to hit the right component. From 1987-90, the 4. They can also be the cause of eronious check engine lights, cold or hot start problems, or idle control malfunctions. MADE IN THE USA!Unlike some that only sell you 3 wires for your Battery, Alternator, and main Ground, our kit does a complete upgrade over your factory wiring. Mopar from 91 on. 0L Jeep fuel injection system. 1990 Jeep Cherokee Questions Get answers to your auto repair and car questions. 0 NEVER had TBI in a Jeep. How does an idle air control valve work What is an idle air control valve. Many of these tips were provided to me and my buddy Joe by JeepTech when I was Service Manager/Shop Foreman at a Jeep dealer from 1980 through 1992. Back to Auto Repair - Roadshow forum. Join thousands of other Jeep fans as we tackle Wrangler problems and more. This Jeep was quick, and always ran with no problems. 5L TBI Four-Cylinder Engines In 1986, the AMC 2. It worked well for the time I had it, and I never noticed a difference in ride or MPG. Troubleshooting/Problems mavis told me my emergency brake line is sticking when pull the brake and said that is damaging my regular brakes they had chaneg pin on the brake did not show where if any know how i can fix would love to do it learn how fix my own jeep now 2007 jeep grand cherokee v8 4. right now you're hatin the renix. Just an FYI, depending on the year Renix systems were rated up to 175 hp. I am also a user of MSD products on my 1988 Jeep Cherokee. " It controls a variety of functions, including how your engine runs and the individual sensors that provide it with information. Here's a diagram for Chrysler Jeep firing order. I am having the current symptons on my 1990 Jeep Wrangler (2. 1987-1990 JEEP RENIX FI SYSTEM SERVICE REPAIR MANUAL FULL/COMPLETE VERSION File Format: PDF Compatible: All Versions of Windows & Mac & Linux Printable: Yes. Renduinix - Arduino Renix Management (Jeep Cherokee 88-91) Post by Trashpanda » Thu Oct 05, 2017 8:39 pm I found out about this a while ago, this is an Arduino setup to monitor and tweak the Renix engine management system of the 88-91 Jeep Cherokee and others. With a newly programmed ECM or TCM for your Jeep from Car Computer Exchange, you can keep it running like a charm, whether on the road or on the trail. I assume you mean a 1987 Jeep Cherokee since that is the first year the 4. Jeep Cherokee was a full-size SUV, one of the first compact SUVs and now is crossover SUV manufactured by FCA US LLC since 1974. Remanufactured 4. 5L TBI Four-Cylinder Engines In 1986, the AMC 2. This is a great tool to monitor your Jeeps sensors and troubleshoot rough running conditions. I am going to try and see if it holds water at some point. 1998 Jeep Cherokee 4x4 4. The most recently reported issues are listed below. The Golen Engine 4. Jeep Renix Stroker - Copy. The Renix computer was first used on 1986 AMC 2. 1990 Jeep Cherokee Questions Get answers to your auto repair and car questions. but fear not! Myself and Fred run renix systems with minimal issues, but I would suggest that a more "mechanically inclined" person own a renix jeep because of its oddities. 1989 Jeep Cherokee Repair Manual Pdf 1987 Jeep Cherokee Xj Repair Service Manual Dlfiles24 1987 1990 Renix System Jeep fi Notes Notes Title 1989 Jeep Fi Manual Author Frank Created Date. To Ensure Consistent High Quality. 0 NEVER had TBI in a Jeep. History Model years: 1986 - Renix TBI available on Jeep 2. Thank You in advance for purchasing our 1996-2004 Jeep Wrangler 4. Jeep Cherokee was a full-size SUV, one of the first compact SUVs and now is crossover SUV manufactured by FCA US LLC since 1974. The Off-Road tires and lift make this a. Model years: 1986 - Renix TBI available on Jeep 2. I hate throwing parts at a car and hope to hit the right component. so, I'm having a real problem here. 95/96 was when the Mopar obdii (partial) was introduced. 0L Renix inline-6. 0l in the Cherokee's. download Jeep Renix Fuel Injection Manual. 5L TBI: Cherokee, Comanche, Wagoneer, Wrangler DESCRIPTION The Renix electronic ignition system consists of a solid-state Ignition Control Module (ICM), a distributor, a Top Dead Center. The Renix is a good system when it works, and has closed loop oxygen sensor, and is MAP based , speed density system. This is one of the books that many people looking for. It is very easy to do and it takes an hour or less if you know what youre doing. Resolving Renix issues requires some specialized knowledge which most Jeep users do not possess. 1234567890123456789012345678901212345678901234567890123456789012123456 1 2345678901234567890123456789012 1234567890123456789012345678901212345 6. To Ensure Consistent High Quality. 0 made 173 hp (129 kW) and 220 ft·lbf (298 N·m) of torque. 0L inline 6 cylinder engine. 0L 99-04 WJ, 00-06 TJ - 2002 and up were TUPY heads and did not have the cracking problems that earlier 0331 heads had. Fuel Filter/Fuel Pressure Regulator Replacement on 5. Condition is Used. Once I had some free time, I pulled the Jeep in the shop to do some checking. Renix AW-4 Transmission Swap into a YJ '87 XJ AW-4 into '93 YJ. This is taken from JP magazine Run, Run, Rudolph Maybe it is age, maybe it is mileage, but we've seen a lot of Renix-era ('87-'90) Cherokees where the bolts holding the intake and exhaust manifold to the six-cylinder engine work themselves loose and cause the engine to race around 2,000 rpm. They can also be the cause of eronious check engine lights, cold or hot start problems, or idle control malfunctions. bllsht wrote: > Renix was 87 - 90. If you are one of them and you need help, your best bet is to ask an Expert. i stop get out and look at the resevouir. Actually, the Renix system isn't all that bad. 5 L four-cylinder engines. Easily locate the brand and engine type you need to learn how each engine replacement enhances your Jeep. Read 1989 Jeep Cherokee reviews from real owners. It does have a lot of miles on it. 5 Jeep Wranglers on this website. The system improved the drivability of the Jeep Cherokee XJ models and the Comanche pickups over the first two months of production that were fitted with carburetors. You may be a technician that intends to search for references or fix existing issues. 0L RENIX Fuel System Diagnostics. The Jeep Comanche (designated MJ) is a pickup truck version of the Cherokee compact SUV that was produced from 1986 to 1992. A defective unit is one of the most common no start or random stalling problems with the Bendix / Seimens Renix systems. It shared the name of the original full-size SJ model, but without a body-on-frame chassis, it set the stage for the modern SUV. any helping comments are appreciated. Jeep Cherokee was a full-size SUV, one of the first compact SUVs and now is crossover SUV manufactured by FCA US LLC since 1974. 5L TBI engine. Your help and knowledge is greatly appreciated! Dave. repair manuals; auto user manuals; Friday, June 20, 2008. Does not run. General Information Repair Guide Print See Figures 1, 2 and 3. 1989 Jeep Cherokee Repair Manual Pdf 1987 Jeep Cherokee Xj Repair Service Manual Dlfiles24 1987 1990 Renix System Jeep fi Notes Notes Title 1989 Jeep Fi Manual Author Frank Created Date. MUCH better than a crappy Haynes or Chiltons manual! Just follow the link from the Downloads Page. Mine seems to have gotten damaged somehow. Performance gains for your early 4. The 1987 RENIX 4. Reliability, without having to manually make adjustments for weather or altitude, to programability, being about to gain better fuel economy or more power thanks to the use of engine control computers are just some advantages. Courtesy of Chrysler Motors. Shop for discount Jeep Cherokee Intake Manifold here. The Renix also used a very advanced engine knocking sensor that allowed the computer to make the appropriate changes to prevent predetonation in each cylinder. I have replaced several items because of extremely high emissions. No exhaust. 0L Stroker Note, this article was first published on www. The Renix system was used from 1987 to 1990 on the 4. I went with the 77 series because of the aesthetic and reviews i read abiut it. One of the most fascinating powertrain conversion platforms among the Jeeps are those into the Jeep XJ Cherokee. As more and more power enhancements are making their way into the Jeep 4. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Titan Engines. 1987-1990 Jeep Cherokee Xj Comanche Mj Renix 4. Find out what they're like to drive, and what problems they have. Sometimes on a manual transmission equipped Renix Jeep there is an accumulation of debris on the tip of the CPS. This is a great tool to monitor your Jeeps sensors and troubleshoot rough running conditions. have spark &. Motor has normal blowby problems and burns no oil. Technical DIY instructions covering common issues on the Renix XJ Cherokees and MJ Comanches (1987-1990). by mrsmithb | July 18, 2006 12:28 AM PDT. Leaks developed around the oil filter and oil pan. The number one cause for high idle is an imbalance in air pressure. This is one of the tougher and more complex t-bodies to work on, and absolute pain. SYNC PULSE SIGNAL GENERATOR (STATOR) The sync pulse signal generator is located in the distributor and works in conjunction with the engine speed sensor to provide the ECU with input to establish and maintain correct injector firing order. Now then, here are some general specs for XJs and ZJs XJ most ideal years to look for: 1991-1999. I thought the 90's were Mopar - so much for memory.