20 Most Recent 1993 Jeep Grand Cherokee Questions & Answers

Use in temperatures above 0 degrees
* P3M017
Note :
Peak Performance 10W-30 Conventional Motor Oil

* 3619
Note :
Pennzoil Premium Motor Oil 10W-30

* 935
Note :
Valvoline SynPower Full Synthetic
10W-30 Motor Oil

* XO10W30QSP
Note :
Motorcraft Synthetic Blend Motor Oil 10W-30


Use in temperatures below 61 degrees
* VALAC5W30
Note :
Valvoline Premium Conventional 5W-30 Motor Oil

*98HC54
Note :
Mobil 1 EP 5W-30 - Extended Performance Synthetic

* 220013754
Note :
Chevron Supreme 5W-30 Motor Oil 5 Liter


Hope this helps.

first, there is no 'fuse' identified in either of the Haynes or Chilton's manuals. I've looked. There could be a 'fuse link' somewhere in the line, as it's incomprehensible the folks at Chrysler would design this vehicle with a fire hazard built into it like that, no fuse or fuse link or relay known, but the mythological 'fuse' referenced in the troubleshooting section of both manuals.

In any case, if the vacuum line appears to not leak when you open it and **** on the line going to the rest of the vacuum system, or pull vacuum on it with a small handheld vacuum pump, and it doesn't leak, it then becomes an 'electrical' issue.

mine worked flawlessly for a a long time, and suddenly without warning 'died' and wouldn't work one day. It didn't go out on the job, in other words.

last but not least, references to the brake switch are made, but if the brake lights work, that seems to eliminate the brake switch as a possibility.

sounds expensive taking it to a Jeep dealership, but if you have a reputable one (hahahahahahah!) in your vicinity, they might zero in on it fast and fix it cheap, then again, they may not. Driving this vehicle without cruise control across country isn't so bad, but it requires a lot of foot wedging near the pedal, to get that done without having a very tired leg over time.

check voltage regulator

You cannot lube the motor as it is sealed for life. The reason it only works on high is either that the motor is defective or the blower motor resistor pack is defective. As the motor is squealing, which is an indication that the bearings are failing, I would recommend you replace the blower motor and see if it still only runs on high. If so, then replace the resistor pack.

yes but not the right way to do it

I recently repaired my non-working 1995 ZJ VIC by reflowing the solder on the wire connections to the circuit board, and other cold solder joints. Gently move the clips that hold the plastic housing together to open it up. Mine came right back to life. Alternately, check your local JY, and online auction sites.

it can cause it to run rich because the oxygen sensor may be getting a false reading as to how much oxygen is there....this in turn causes the pcm to add more fuel

First I suggest scanned the ECU in order to know what fault codes is stored there. HERE procedure.Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.Thank you for using Fixya, and have a nice day.

Crank sensor. Its on the passenger side on the top of tranny. Will have either 1 or 2 10mm bolts holding it on. And a plug. My 94 had the same problem. It would run fine then you shut it off and all it woild do is crank. Wait like an hour and it will start back up. New crank sensor and it was fine

Your fuel pump is on its way out it's giving you signs what you see is what normally happens when fuel pumps go out best of luck to you

Auto parts stores have manuals made explicitly for your make and model. It will have the diagram with the color code for all the wires you need.

First try a different brand filter. If it still overpressurizes, I'd suspect a stuck pressure relief valve

Check the ecm fuses if they can't communicate using an obd reader then the ecu isn't getting any power different car company's label them differently but look for the ones that are labeled something like ecu, ecm, engine controller, or something like that I hope this helps

use a scan tool to reset the ECM

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I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure. Best Manuals

Check for a signal at the ignition coil with a node light or a 12 volt led test light while cranking. Check for a signal at a fuel injector connector jack while cranking. If both these signals are missing. Ignition and fuel signals, then the problem may be some common point. My 've will loose both these signals if there is no crank shaft signal or position sensor. CPS is on rear of engine, on transmission bell housing. Check for connections of PCS.

Are you getting spark at your plugs?