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I have a 99 jeep cherokee sport 4 wd and it wont start didnt have trouble running day before but wont start now

It was running good day before now it wont start at all trys to but acts like its missfiring what could it be

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  • Cars & Trucks Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Oct 29, 2012

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Posted on Jan 02, 2017

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SOURCE: 1999 jeep cherokee starts hard

have fuel pressure checked ...fuel pump maybe losing prime

Posted on Sep 28, 2008

  • 740 Answers

SOURCE: 96 Jeep Cherokee Sport Hard Starting

The Engine coolant temp sensor would ABSOLUTELY cause a hard start, but don't guess get the codes check again at Auto_Zone to make sure. Another cause of that kind of hard start is a dirty throttle body/ intake manifold. Use INTAKE cleaner and a rag clean the intake esp[eciall in the throttle body area. Good Luck

Posted on Dec 28, 2008

emissionwiz
  • 76124 Answers

SOURCE: I have 3 transmission trouble codes I need to

OK, GOT IT YES THE RANGE SELECTOR (THAT IS THE FORMAL NAME) SWITCH CAN CAUSE THIS ISSUE

Posted on Mar 23, 2009

redbeard00
  • 957 Answers

SOURCE: 99 jeep cherokee sport 4.0l 6cyl voltage will go to 19v

The problem sounds intermittent, if you put volt meter on the battery while it is at that 19volt mark/reading(on the gauge cluster) you will be able to see if it is true. If your alternator is really charging over 16volts the lights should be getting brighter then usual and/or they are burning out. Find out ASAP, if the alternator has a defective voltage regulator, it needs to be replaced. Prolong use will damage components.

Posted on Jun 18, 2009

SOURCE: 1998 jeep Cherokee Sport wont start

Give us more info. I will assume your past any battery issues so I won't ask. Do's it ever start or are you down and out?

Posted on Sep 28, 2009

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Bill, No known inertia switch for your vehicle unless installed aftermarket. Could be Cam or crank sensor,security issue,etc., have a good tech. scan for trouble codes, diagnose and estimate repair. Check the attached links,instruction and guides, Good luck
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My 99 cherokee sport wont start after it gets hot and you shut it off. it has a new starter and the battery checks out good


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Sep 24, 2009 | 1994 Jeep Cherokee

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All cluster gauges lights are on, windows air cond does not work


souns like you tried to install windows on a mac every thing works but unfortunantly it all comes on at once


likely the computer has some bad mojo dude
also check the computer has a good ground
hell why not check all your grounds under the hood too as they will cause faulty errors also

Sep 16, 2009 | 1999 Jeep Grand Cherokee

1 Answer

I have a 99 jeep cherokee sport will not start


Seems to be a chronic problem with crank position sensors... On yours it is tested between b&c terminals and should have no continuity there. (should show an open circuit if good)

Jun 05, 2009 | 1999 Jeep Cherokee

1 Answer

99 cherokee sport starts hard after sitting over night or 3 to 4 hrs. starts right away if key is turned on and off2to3 times represurizing the system


Could be related to the fuel system. What have you replaced or checked so far. I would look at the battery and the charging system. Also look for a fuel leak, pump pressure, and the vehicles maintenance/repair history.

May 31, 2009 | 1994 Jeep Cherokee Country

1 Answer

96 Jeep Cherokee Sport Hard Starting


The Engine coolant temp sensor would ABSOLUTELY cause a hard start, but don't guess get the codes check again at Auto_Zone to make sure. Another cause of that kind of hard start is a dirty throttle body/ intake manifold. Use INTAKE cleaner and a rag clean the intake esp[eciall in the throttle body area. Good Luck

Dec 28, 2008 | 1996 Jeep Grand Cherokee

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