Question about 1999 Jeep Cherokee

1 Answer

A little help with trouble shooting a '99 Cherokee Sport

OK....this has been kind of a headache for me, but I think now's the time to be a man and ask for some help. It would be greatly appreciated.

Here's what's going on, I get a call about my Sister's '99 Jeep Cherokee sport (Auto / 2wd / 4.0 / 120k miles) had broken down about a mile away from my home. I go out there to see if I can start it up and bring it back home to check it out and work on it. Well, I couldn't get it running, or stay running. First I noticed that when I tried to start it the battery was completely dead. So then I swapped it with a good battery and tried to start it. It would start but then after a second or two it would die. It would not idle and it seemed as if it wanted to stay running so a gave it a few smashings of the gas pedal and it would die. And there was a backfire sound coming from the intake. Everytime I stepped on the gas pedal it would die. After about an hour and a half of trying to get it running I gave up and called a tow truck. Now at home, I figured that it couldn't be the fuel pump or crank sensor (changed them less than a year ago). I did a lil detective work by asking some questions and found out that the Jeep would occasionally shake erratically before and after it being warmed up. And it would also on occasion not start after being parked for a lil while but would start if it were in neutral and a foot firmly placed on the gas pedal and quickly put in drive or reverse.Then I found out that it had been driven approx. 3-4 days and 100miles without a gas cap. I had a hunch it kinda sounded like no fuel was getting to the engine, I thought it may be the Fuel Pressure Regulator after checking and seeing there was NO fuel pressure (just a lil dribble like fat guy eye-balling cake) even with a full tank of gas. But I can hear the fuel pump operate when turning the key to the on position (that can't be it). So I did a lil routine maintenance (oil, plugs, cap n' rotor, new battery and even tested the alternator) and scanned the car. This is what it said - P0505 Idle Control System Malfunction, P0123 TPS/Pedal Position sensor a circuit high output, P0122 TPS/Pedal Position sensor a circuit low output. HMMMM.... so I changed the Throttle Position censor and still no change. It won't run. I have a Haynes manual and I cant seem to find any mention of the "Idle Control System"( I pretty much read it cover to cover twice!). Where and what is that?! Is it called something else? Could my problem be the Fuel Pressure Regulator? Idle Speed Actuator Motor? Has anyone encountered anything similar to this? Any help would be great! Thanks for any and all help.

Posted by on

  • silver leyva
    silver leyva Mar 12, 2009

    Thanks carhob. Had to replace pump strainer/screen and fuel pressure regulator and now have some fuel getting to the motor. Will check the IAC. Thanks.

  • silver leyva
    silver leyva Mar 14, 2009

    I replacced the IAC and even the cam sensor (pickup coil) and still nothing! I talked to a buddy of mine (worked for Chrysler, repairing autos and jeeps for years) and told me that it can't be my crank sensor because it is firing. He's even stumped. What now? Any suggestions would be greatly appreciated. Thanks.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 366 Answers

1st you said it yourself in comment,no fuel pressure.......!no fuel no start!even if pump is running doesnt mean its good,check fuel filter may be badly block,and what youre looking for is the idle air control valve aka iac sensor,get fuel going to motor first!

Posted on Mar 07, 2009

  • carhob Mar 15, 2009

    you have spark!u have fuel pressure!and its not starting?isyour spark blue or yellow,is fuel pressure up to spec? it should start ,when cranking is it popping at throttle body,does it backfire,

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Do I have to tear the dash apart to locate this cluster where eveything plugs in on a 99 jeep cherokee sport, what does it look like?


So that you get a little confidence in what
you are going to attempt, please go to your auto supply store and get a copy of the Haynes '99 Jeep Cherokee service manual. It has everything in it to help you. Don't panic...take it slow!

Jan 16, 2013 | 1999 Jeep Cherokee

1 Answer

How can i easily trouble shoot rear defrost problems for 2000 jeep cherokee sport ( it isnt working at this time)


Use a test light and see if you get current to the grid. Check it on the sides. If no current check the switch and fuse.

Dec 20, 2009 | 2000 Jeep Cherokee

1 Answer

Have 97 cherokee sport 4.0 has trouble startingt but


Vacuum you are seeing is about 13inches low. either something is causing the timing to stay retarded or the timing chain is stretched beyond it's limit. Id check the MAP and throttle position sensors as they have influence over timing (and fuel mixture) and check the chain for stretch. Since you had the distributor out, it is also possible that you have installed it one tooth off...that also can ****** the timing.

Sep 04, 2009 | 1997 Jeep Cherokee

1 Answer

I replaced the thermostat on my 99 cherokee sport 4.0 yesterday. it it still doing the same thing. the temperture reads fine then bam! all at once it rapidly shoots up. why?


you have air in the system the best way i have found to bleed it is to remove one of the heater hoses at the engine and top off system

Aug 06, 2009 | 1999 Jeep 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

1 Answer

99 cherokee radio problem


Hi,

Either the radio's output ICs are fried or speaker/wires needs to be checked.

Incidentally, there are some higher end versions that has an Infinity Amplifier (P/N: 56038407AD) powering the speakers and not the radio (alone). If so, this amp needs a trigger on from the head unit to work and therefore, the trigger wire/connection must be checked. Otherwise, it may likewise require an internal check.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jul 12, 2008 | 1999 Jeep Cherokee

3 Answers

Trouble with the 99 Cherokee Sport


I have had a similar problem with mine, also 99 Sport. Cycling the window lock switch seems to cure it each time it does this, when it won't work hit the window lock switch then try it then hit it again. Takes a couple tries sometimes. Some kind of stupid glitch somewhere like the one that locks the stupid doors when the key is on.

May 14, 2008 | 2000 Jeep Cherokee 2WD

Not finding what you are looking for?
1999 Jeep Cherokee Logo

750 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...