Hesitation and rough idle in a 1998 Jeep Wrangler can be caused by several factors, including a dirty or failing mass air flow sensor, clogged fuel injectors, or a malfunctioning ignition system (such as bad spark plugs or ignition coils). Additionally, vacuum leaks, a faulty throttle position sensor, or issues with the fuel delivery system (like a weak fuel pump or dirty fuel filter) can also contribute to these symptoms. Regular maintenance and diagnostic checks can help identify and resolve the underlying issue.
More than likely... Tune up, or vacuum leak
Poor performance, poor fuel mileage, hesitation, rough idle,
because of ignition coil faulty.due to mountings,abnormal fuel pressure.
have you taken your jeep to check the timing often when your timing is off it causes this i had the same problem in my 1994 jeep wrangler 2.5 inline 4. Does it run better if you stay on the gas or no if so your timing may be off slightly and your ECM is trying to compensate causing the rough ride.
Check the motor mounts. If rough when going from Park to reverse or even when in drive it's possible broken mount is the reason. Had same issue and replaced mounts and no more problems
What causes a car to idle good and run rough when you give it gas?
Need to know what "it" is.
Carefully!
ribosomes attached on the sides of the RER makes it look rough under the microscope .
There are many different causes of poor vehicle performance. Here are some examples. If the engine RPMs are high but the vehicle will not reach normal speed then there is a problem with the engine's connection to the drive line. If the engine is running rough it will not be able to produce a normal amount of power. If the exhaust is plugged the engine will not be able to breath. There are many more possible causes.
1.rough idle 2.hesitation when accelerating 3.wrong fuel/air mixture 4. high fuel compsumption
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