Question about 1990 Jeep Cherokee Limited
First thing to do is have a compression test of the engine, to determine its internal condition and worthiness. Go from there. Low compression in any cylinders from worn rings or poorly sealing valves translates into poor performance and horsepower. What you want is good compression (about 140 psi minimum) across all cylinders, and near evenly balanced-all with nearly even figures. As a rule of thumb, all cylinders should be within 75% of the highest reading cylinder
Posted on Oct 25, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: 2005 Jeep Grand Cherokee Problem
I would start by checking all the fuses under the hood.
There is a fuse called IOD which the factory leaves out and gets put in at the dealer.
That fuse could be bad.
Posted on Oct 31, 2008
The squeaking is definately from the belts.
Have you tried adjusting them ?
Since now the power steering has failed it could be due to the power steering pump bearings,may be tight to rotate and thus the squeaking noise, or you may just need to replace the belts.
WD-40 wouldnt work permanently..try using STP belt dresser.
Hope this helps!
Posted on Aug 07, 2009
Posted on Aug 11, 2009
Check in the Fuse Block, the cavity 2, fuse 30 Amp c/Brkr (Section (8W Page 7)
More details about electrical system for ZJ Grand Cherokee, you can find here: ZJ-Secc-8W-Wiring-Diagrams
I hope help you with this (rated this help). Good luck.
Posted on Sep 24, 2009
Have actually done some research on those and found that the horsepower increase advertised is in the higher RPM band (where in essence it is unusable). As far as fuel consumption goes, there is always a "trade-off" when it comes to that. On earlier carbureted engines it was fairly easy to squeeze more mpg from what you drive. Today's injection systems are very precise, and more difficult to get much more than factory standards from them. Three items you can do to get better mpg are: Keep the air filter clean (vacuum and shake out once a month), Use a good quality synthetic oil in the engine. Make sure your ignition system is in good condition and not arcing anywhere. Keep wires clean and plugs properly gaped (if you can't light the fire, you waste the fuel in that cylinder).
A new problem we all face is the introduction of alcohol into our fuel...It does not produce the same btu's of heat when it burns...heat is power.
the more alcohol in a system the lower the mpg is because it takes two times the quantity of alcohol to make the same amount of power.
One other forgotten item is the fuel injectors. Even the most well filtered fuel carries a certain amount of abrasive grit with it. As it passes through the nozzles it enlarges them. This alters the amount of fuel going into the engine. That, coupled with even a small amount of gunk (they all get that to some degree) alters the spray pattern and decreases efficiency.
Back to the "chip" ...I haven't seen anything there that would in any way justify the cost there. If $ were no object, I'd be more likely to put a turbo-charger on the engine and start looking at add-on overdrive units.
That's where you can get good solid results! (but expensive)
Posted on Feb 15, 2010
Testimonial: "thanks for you to make me understand and save my money 99.99% cool"
Tips for a great answer:
Jul 09, 2016 | 1990 Jeep Cherokee Limited
Dec 27, 2011 | 1990 Jeep Cherokee Limited
Aug 02, 2011 | 1990 Jeep Cherokee Limited
Jan 19, 2011 | 1990 Jeep Cherokee Limited
Feb 02, 2010 | 1990 Jeep Cherokee Limited
Sep 30, 2009 | 1990 Jeep Cherokee Limited
Jul 14, 2009 | 1990 Jeep Cherokee Limited
108 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: