Question about 1999 Jeep Grand Cherokee

Open Question

99 Grand Cherokee Laredo... Problems

99 Jeep grand Cherokee Laredo 4.0 straight 6 - The first issue I had with this vehichle was the water pump. replaced it and had no problems for a time. after that was fixed i began noticing the vehichle sounded odd when idling, i would hear a CLICK and the engine would sound like it was reving then it would slow and CLICK and rev and slow etc. etc. The engine then choked out one night in the drive thru of a restaurant while idling, after this the check engine light came on, i had it read and it said crank positioning sensor, i replaced and the jeep drove great for about an hour then started dieing when idling, check engine light came back with tons of codes, my mechanic replaced the spark plugs & ground the battery clamps so they would tighten better, again drove great for a few hours then began dieing at every stop light, starts perfectly every time and runs better when it's cold. Mechanic then thought it was the coil pack, he replaced this which changed nothing and ended up putting the old one back in, he says i must take it to a dealer as he feels it is an issue with the computer.........please help

Posted by on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Mad Scintist
  • 6 Answers

SOURCE: 1996 Jeep Grand cherokee 4.0 liter runs rough at times.

I Found that the outboard PCM cover screw was shorting out the circuit board.
Short story long: I have a 96 Grand Cherokee 4.0L, 125,000 miles. Several weeks ago, I started to have stalling issues. Hot or cold, dry or wet, first drive of the day or last, it didnt matter. The engine would cut out. It felt like it lost all electricals.
At the time it was showing an ASD relay code. Swapped the ASD and A/C relays. Same problem. I didnt have time to look at it, so I had the dealer go through it. After 2 days and $200, they called and said it was the ASD relay, and that they put in a new one, and its all good. Um, ok, maybe I missed something. Im a trusting soul, but lets see if this fixes it. The next day the problem was back. I went back to the dealer and they basically said, We dont know what it could be, good luck with that. Now my wife knows why I dont go to the dealer. By the way, the old relay tested good.
My turn. Being the methodical aircraft mechanic that I am, I grabbed a multi-meter, contact cleaner, and wiring diagrams. I cleaned connectors, ohmed out wires and sensors, checked for power and grounds. Everything checked good. By now, its showing ASD, crank sensor, and primary ignition codes. Then, with my wife trying to start it, I wiggled the connectors on the PCM. Every time I wiggled the gray C3 connector just right it would run. When I let go, it would die. So I took the connectors apart and tightened up the crimps (I dont recommend doing this without the proper extractors and crimper). Threw it back together and BAM! Same problem. Well, time to bite the bullet and check for bad solder joints on the PCM board. I took the cover off of the PCM and realized that looking through the potting compound is like looking through Guinness Stout. But, I put it back in and hooked it up. It started stronger than ever, and didnt even think about stalling. Yes! I figured that I finally got the connectors sorted out, so I left it over night to cool down. Got up the next morning and it started right up and wouldnt stall even when wiggling the connectors. So I put the cover back on, put the PCM back in, hooked up the connectors, and BAM! It wouldnt start! That was the point when my wife asked, Hows it going? And I, being the methodical aircraft mechanic that I am, said, what the ----? Thats when my wife turned around and went back into the house. While smoking a pack of cigarettes, I thought, Gee, it runs with the cover off, but not with it on. DUH, wonder what it could be? So I backed out the two screws that hold the cover on and BAM! It started right up. Then, while it was running, I tightened the outboard screw and sure enough, it died. Yes! Aircraft mechanics love it when they can make things stop working. I cut the screws (1/4 long, factory screws are 1/2 long Torx head) with a pair of wire cutters, and shes been running great ever since.

Posted on Oct 07, 2010

crayzeetrayn
  • 837 Answers

SOURCE: 2001 Jeep Grand Cherokee code P1391

I would check to be sure that the timing chain hasn't jumped at all ..

Posted on Mar 25, 2009

  • 8 Answers

SOURCE: My 1996 Jeep Grand Cherokee cuts off while driving

try the map sensor it controls the air flow thru the engine.

Posted on Oct 01, 2009

  • 6982 Answers

SOURCE: 1994 jeep grand cherokee laredo starting problems

Check to see if the fuel pump is running after it shuts down...could be a relay or the pump itself (overheating internally) Checked the fuel filter yet? Some crank sensors need to be shimmed. If it's too close to the flywheel even though you recently changed it, if it's too close to the wheel it can fail again. May not be the case but worth checking over. Also check the ceramic resistor on the left fender near the master cylinder if you have one. That too can cause problems.

Posted on Dec 27, 2009

jimmybrown67
  • 835 Answers

SOURCE: 1993 5.2 jeep grand cherokee no spark. replaced

pick-up coil in distributor bad. have to pull dist. take shaft out to get it out

Posted on Dec 06, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Has anyone had any problems with a 2004 Grand Cherokee wanting to turn off when idle or when shifted into drive?


sure
every time the ASD drops
or every time i run sparkplugs to 300 k miles
all jeeps do that hell all gas cars since 1884 (still runs to)
all do.
its called a TUNEUP., ask grand dad.

Mar 01, 2017 | Jeep Cars & Trucks

1 Answer

I HAVE TO CHANGE OUT A CRANK SENSOR IN MY GRAND CHEROKEE.


Jeep Crank Sensor Replacement, P Codes P0351, P1391 ...

? 6:24
www.youtube.com/watch?v=7D0vUEDSwXo
May 12, 2013 - Uploaded by Robert DIY Replaced the crank sensor on this 2003 Jeep Grand Cherokee.... to replace my crankshaft position sensor on my 1998 grand cherokee laredo.

Jeep Crankshaft Position Sensor Replacement (CKP, CKPS ...

? 4:07
www.youtube.com/watch?v=1Ho5iAKQV00

Oct 27, 2013 - Uploaded by WeekendHandymen
hi , do you think if I replace crank sensor will solve the problem ,my jeep .... Where's the crankshaft located in 99 jeep grand Cherokee laredo .


Oct 24, 2015 | Cars & Trucks

1 Answer

Ok my 2001 Grand Cherokee Laredo wont stay in park


Transmission sticks in reverse- won't go into park. - JeepsUnlimited

www.jeepsunlimited.com/forums/showthread.php?...won-t-go-into-park
Jun 14, 2013 - 12 posts - ‎5 authors 2003 6 cyl 4x4 Grand Cherokee Laredo automatic- Occaionally, when shifting from REVERSE TO PARK, my Jeep will stay in reverse. Typically its ... '2001 WJ'4,0L'42RE'NV 242'380000 km'ECE Compliant' ??????????? ??? ...

2001 jeep grand Cherokee laredo - CarGurus

www.cargurus.com > Questions > Jeep > Grand Cherokee
CarGurusJan 27, 2014 - 2001 jeep grand Cherokee laredo - Just purchased a 2001 Jeep GrandCherokee Laredo and ... It starts in PARK sometimes and sometimes it won't and I have to start it in Neutral. ... Hatch shuts flush, but won't stay shut. help!

Oct 22, 2015 | Cars & Trucks

2 Answers

Fireing order diagram


cylinder firing order is: is 1-5-3-6-2-4 .... In Jeep Grand Cherokee Laredo ...Happy motoring.

Sep 04, 2014 | 1996 Jeep Grand Cherokee

1 Answer

1999 jeep grand cherokee laredo v6 4x4 won't fire on all 6 cylinders just 4 why?


Plenty of causes. Plugs, valves. rings, numerous electronic/electrical faults. Diagnose vehicle and eliminate problems one by one.

Oct 30, 2012 | 1999 Jeep Grand Cherokee

1 Answer

I have a 99 jep grand cherokee laredo 4.0 L. AC


you may have to get the system vacuum pumped and recharged

Jul 21, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Need firing order for 1998 Jeep Cherokee gand


For the 1998 Jeep Grand Cherokee Laredo:
I do not know if you have the 4.0L In-Line 6-Cylinder, the 5.2L V8, or the 5.9L V8; however I have included ALL below:

For the 4.0L In-Line 6-Cylinder:
Firing Order:
1-5-3-6-2-4
Cylinders:
(back)
...6
...5
...4
...3
...2
...1
(front)

Distributor:
....(back)
.....5....3..(+)-screw
1.............6
(+).4....2

For the 5.2L V8: AND 5.9L V8:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
.......(back).......
|..8..|.........|..7..|
|..6..|.........|..5..|
|..4..|.........|..3..|
|..2..|.........|..1..|
.......(front)
Distributor:
.....(back)
.......3
..4.........6

8.............5
..1.........7
.......2
......(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

May 28, 2010 | 1998 Jeep Grand Cherokee

1 Answer

What kind of engine is on a 94 jeep cherokee laredo V6 4x4


THIS MODEL HAD NO V6 ENGINE, IT HAD A STRAIGHT 6 (4.0L) OR A 4 (2.5L) CYLINDER, THE GRAND CHEROKEE HAD A V8 (5.2L) AS AN OPTION AS WELL.

Apr 16, 2010 | 1994 Jeep Grand Cherokee

2 Answers

Replacing water pump on 2000 Jeep Grand Cherokee V6


i have a 2000 grand laredo jeep cherokee that is leaking fliud bad i think it the water pump how do i fix it ??

Jan 10, 2009 | 2000 Jeep Grand Cherokee

2 Answers

I got a 99 jeep grand cherokee laredo with a 4.0 straight 6 and looking for the radiator fan relay...any suggestions???


It's behind the passenger headlight.Need to take off grill,bumper fascia to get access to it.Mine took about an hour alltogether.

Jul 18, 2008 | 1999 Jeep Grand Cherokee

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

346 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

75197 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7782 Answers

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

Answer questions

Manuals & User Guides

Loading...