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1999 Jeep Grand Cherokee Problems To Keep In Mind

Pre-Programmed 1992 Toyota Corolla 1.6L Engine Control Module (PCM/ECM/ECU) Plug&Play

1999 Jeep Grand Cherokee Problems To Keep In Mind

Jeep made way into the four-wheel-drive market with its rough and ready Cherokee wagon in 1999. The 1999 Jeep Grand Cherokee, a much-improved wagon, is better built compared to the previous model. The replacement came with a more impressive list of standard features, such as bulletproof. It was quite a step up in price. The Grand Cherokee is built and sold in Australia. With a larger size both outside and inside, Grand Cherokee of 1999 looks more modern, refined, and reliable vehicles than its predecessor. Comfort is commendable in the model and front seat checks with ample head and legroom. The model comes with improved load space that accommodated the spare wheel. Jeep’s effort in their 1999 production is a more refined and released vehicle with no road and wind noise as you roll down the road. Grand Cherokee Laredo’s are fitted with a 471 V8 engine.
Grand Cherokee model provides power circulation by an overhead valve fuel-injected. A six-cylinder 471 v8 engine powered Grand Cherokee model with a regular gasoline gas mileage (mpg) rate as 6.3gals/100 miles. The invention was a 4×4 wheel drive dominated the industry. 1999 Jeep full-time drive system rolls with rear wheels. However, there are some common car complaints and problems with the 99 Jeep model. The primary reported car complaint on 99 Jeep Grand Cherokee include:
  • Rough idle and misfiring 
The technical service bulletin highlighted these issues as an existing common engine failure. The 471 v8 engines tend to experience a rough idling on a restart when the engine is already warm. This issue typically occurs for 20 to 30 seconds after the restart. It is realized during the engine restart following 10 to 20 minutes in a hot ambient condition of soak. These malfunctions could be caused by exhausting heat from the manifold exposing the injector fuel vapor that forms within. Damaged piston plugs can as lead to engine failures. It will lead to misfire until wiping is done to clear the existing steam. Fitting the fuel injector sleep aid in lowering the injector temperature and fuel will not frequently vaporize is the appropriate way to fix the problem. Also, check whether plugs are good and fix the broken sleeves with other piston skirts.
  • Electrical Problem 
Electrical shifting in the 1999 Jeep Grand Cherokee is unreliable and is an overall problem reported periodically by most users. The problem is part of the massive transmission failure. Issues will arise by experiencing abnormalities like jerking, hesitation, and roughness when shifting. Sometimes you find that the 1999 Jeep Grand Cherokee is utterly unable to shifts, or the moving shift is not what displayed on the dashboard. It starts by giving daily drivers various warning lights, dead battery overnight, feedback speakers, and instrument cluster stalling. 1999 Jeep Grand Cherokee PCM problem is electrically locked up, and you should disconnect the battery for about 10 minutes to diagnose. To troubleshoot this defect, replace the battery, unplug the PCM computer, and check all the fuses. Also, use the alternator to check all your light system. To completely fix the 1999 Jeep Grand Cherokee AC problem, replace the ignition system, the cam sensor, and positioning the throttle sensor. Further, the Engine Control Module could be an alternative for a more reliable vehicle.
  • Mintt LogoThe leather dashboard bubbles/wrinkle up
This effect is a visible issue that has come with the 1999 Jeep Grand Cherokee. It has raised concern as it is discovered at around 60200 miles on average. It is an obvious problem to discomfort daily drivers with a well-toned model structure. When the leather dashboard starts to tear, consider replacing with another newly made panel.
  • Transmission problem 
Unintended shifting on Jeep Cherokee is some common car complaints as the mileage increase and become of age. This problem is observed during the vehicle start, engine and transmissions remain cold. Jeep Cherokee jumps gears without any notice, and gears are likely to slip in and out during a drive. You still continue driving, but operating in one or two gears. For instance, the automatic transmission third gear functions, and the other remaining two requires you to shift the transmission manually. To fix, it requires you to check the fluid levels in the transmission and change the oil into proper levels. Visit a mechanical fan regularly to inspect Torque converter clutch circuit and solenoid circuits that commonly become faulty due to this problem.

Other 1999 Jeep Grand Cherokee problems include:

  • A whining noise coming from the rear part of the vehicle when moving at a higher speed is an issue.
  • Leakage of lubricants from the rear differential is a regular concern forcing daily drivers to keep changing the oil.
  • The faulty ignition switch that allows your vehicle to turn into the off position during the drive could lead to engine failure.


The 1999 Jeep Grand Cherokee is ideal for daily drivers who want a suitable vehicle for their daily use and outdoor adventures. It comes with a comfortable ride, despite different issues that regularly arise. For this reason, a clear service routine keeps your Grand Cherokee in condition. 1999 jeep grand cherokee Engine Control Module can help in the sustainability of Jeep maintenance.


  1. Are 1999 Jeep Cherokees reliable?
1999 Grand Cherokee is built as a much-improved wagon that is much better than the vehicle it replaced. It came with more impressive standard features making it a reliable vehicle.
  1. What goes wrong with Grand Cherokee?
Jeep Cherokee is recognized for its off-road performance, but numerous problems have given it a poor reputation. Owners have raised car complaints on engine failure and stalling issues, delayed gear shifts, and intellectual electrical issues.
  1. How many miles can a 1999 Jeep Grand Cherokee last?
Like any other automotive, the Jeep Cherokee lifespan depends on the engine type, use, and how well you are going to maintain it. As such, the average maximum mileage unit this model can hold is 200k miles. Regular servicing can influence more reliable vehicles with huge miles.
  1. What is the best year for a Jeep Grand Cherokee?
Ultimately, Grand Cherokee’s best year relies on what you are looking for and which specifications fit your lifestyle. The more recent is preferable, but if you intend to look for a reliable model that will save your money, something like a 2014 or 2017 is probably the best. For a luxury living experience and new modern features, then 2018 is your great choice.

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