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Where can you find an electical schematic for a 1988 Renix electronic ignition?
Wiki User
∙ 18y ago
Please try: http://www.lunghd.com/Downloads_and_Links/FSM.htm
Wiki User
∙ 18y ago
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What make fuel injection is on an amc 150 1989 Jeep Wrangler?
Renix TBI
Do they make a code scanner for 1989 Jeep Comanche?
No, the '89 is still the renix based control unit. Commonly available scanners will not work with a renix system since it stores no codes. I have heard that dealerships used to have some sort of scan tool that worked on renix based motors, but I've yet to hear of anyone who actually has such a tool nowadays. Renix systems are generally investigated using a volt meter to read the input/output voltages of various sensors and comparing these readings against known "proper" voltages. If a voltage reading is off, the sensor needs replacing.
Will a 1991 4.0 motor fit in a 1989 4.0 jeep Cherokee?
No the 89 uses a renix system which is incompatible with the 91 engine.
Can you use a 90 Jeep Cherokee radiator on a 98 Jeep Cherokee?
Yes, but you wouldn't want to do that, 90 is renix, and it has the older style radiator with the reservoir to fill it, where as your 98 has a filler cap, which eliminates air bubbles that occur from the reservoir.
Will a 1999 intake manifold work in a 1989 Jeep Cherokee?
Yes but you will also need the H.O. throttle body. The renix engine has a three bolt TB and the H.O.s have 4. The manifold alone will give you much more high end power, and the new TB is an added bonus.
Where is the Jeep Cherokee cooling sensor?
The years are specific, it depends, the Renix era- older jeeps, up until 91, the coolant sensor was on the driver's side, cylinder head, closes to the firewall, it is a little hard to see, but it is pretty close to the MAF sensor. On the High Output years (92-96) it is on the thermostat housing.
Whats the difference in the 4.0 and the 4.0 high output engine in the jeep Cherokee?
87-90 is the 4.0 with the RENIX (Renault/Bendix) fuel injection system. This is considered the "low output" motor. 91-06 is the 4.0 High Output with the Chrysler fuel injection system. Cherokees 91-96 and Wranglers 91-95 were badged as "4.0L, High Output". The main difference between the two is the head flow characteristics. The ports in the head for the intake/exhaust are bigger and flow more freely, along with a change in camshafts and the deletion of some sensors, such as the knock sensor found on the RENIX 4.0s. The throttle bodies are also different between the two, intake manifold changes did not come about until 1999 and exhaust manifold changes did not come about until 2000, when Chrysler also switched to the coil on plug ignition system. Personally, I believe the exhaust manifolds on the later 4.0s(2000-2006) are of a much better, 2 piece design. I say this because they do not have the tendency to crack much like the manifolds of earlier years. Unfortunately, this also brought on the addition of 4 oxygen sensors and two pre-cats in the exhaust stream of many 4.0s produced in this time period.
Will parts off your 92 Jeep Cherokee straight six fit your other 92 Jeep Cherokee v6?
There are no 92 V-6's... V-6's were only in the XJ for early/mid 80's & replace by the 4.0L inline 6 cylinder in 1987. Renix controlled from 1987 - 1990 /91 HO engines from 1991 up. (Various head designs but overall the same. Most parts interchange.)
Could the timing cause the Jeep Cherokee to overheat?
Yes. If the timing is off all kinds of bad things could happen. Have a mech. check it. As well as get your Jeep check with a ODB computer. What year Cherokee? XJ or Grand? Engine? If you have overheating issues I would look to the cooling system first especially if you have an early XJ with the closed cooling system. (Pressure bottle on the firewall & NO radiator cap on radiator.) These early systems are sensitive to ANY leak in the system and will boil out coolant if there is a cracked bottle, leaking cap etc. Also, those systems are now 20+ years old & likely ready for a new radiator. Just be prepared to examine the system front to back if you have a RENIX XJ that has not been converted to a newer system or had the early system rebuilt. (Early system is fine so long as you maintain it. Aftermarket replacement parts are still available at this time.) It is almost impossible for you to get the timing "off" in an XJ Jeep Cherokee (or Grand Cherokee) with the 4.0L inline 6-cylinder engine. The 'distributor' (not really a distributor but skip that for now...) has a lock-down tab on it which prevents you from 'adjusting the timing' by advancing or retarding the distributor. DO NOT GRIND THIS TAB OFF! If someone has pulled the 'distributor' out they may have put it back in 1 tooth off - generally won't run other than to spit and fire occasionally. Renix XJ's (1990 & older) have no OBD port that you can read outside of using a real-time analyzer (Sun Analyzer, etc) at a dealership or garage. No Codes are generated or saved on Renix (pre-HO) XJ's. HO XJ's (1991 & up) all have OBD1 or OBD2 depending on how new they are.
Will a 1990 jeep Comanche engine interchange with a 1991 Comanche?
Physically, the answer is yes. the 1990 and the 1991 comanche, however have different engine management systems. the 90 is supposed to have had the Renix fuel injection system and the 91 switched to the Chrysler system. You would need to make sure the sensors on the engine were switched to match the vehicle. Also, any 4.0L HO from '91-up from the XJ, TJ, ZJ and even WJ vehicles should be a bolt in as long as you match the sensors. Later model engines are said to have stouter support ribbing on the blocks.
Why does it stilloverheat I have a 1984 jeep Cherokee and have replacedthe entire cooling system and had the timing adjusted at a shop yet it overheats any ideas why?
Engine info is very helpful on these sorta questions... An 84 will have either the GM V-6 (2.8L) or the 4 cylinder. RARE XJ's may have the early diesels... not many of those around but there were a few made. Inline 6 cylinder / 4.0L XJ's came in late 80's with the RENIX managed engines and CLOSED cooling systems (pressure bottle on firewall + NO RADIATOR CAP). HO engined XJ's with OPEN cooling systems began in 1991 and have a standard radiator cap. Your XJ, if it has the GM V-6 definitely has an open cooling system (standard radiator with cap) and should have same with 4 cylinder. I know of no closed cooling system XJ's prior to the RENIX 4.0L's but... Is the clutch fan working corrrectly? Is the radiator clogged up with debris? (After all... this is a 20+ year old vehicle.) Are your hoses in good shape & NOT collapsing under high engine RPM's? Good thermostat? 50/50 antifreeze mix? Did someone put the incorrect GM water pump in? Late model GM v-6's (fuel injected) came with serpentine belts that had REVERSE rotation from the original 2.8L's.
Would a 1994 Jeep Cherokee 4.0 engine 2-wheel drive interchange with a 1988 Laredo 4.0 engine 4-wheel drive?
The short answer is "yes". It 's not the drivetrain compatibility that's the problem. It will be the electronics that will be an issue. A 1988 Jeep Cherokee utilized Renix electronics and 1994 has a Chrysler brain(computer). The two are not compatible however if you have wiring info for each year and have access to the wiring harnesses/sensors you can make it work. Also are both vehicles of the same transmission. If not you will also need the computer/transmission control module(TCM). You may want to check your DMV regarding emmission standards. Typically you can exchange a newer engine in an older car but not an older engine in a newer car.
