Question about 1999 Jeep Grand Cherokee

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How to check for spark on a 1999 Jeep Grand Cherokee

An a test for spark be made with the coil rail off and the plugs removed from vehicle than put back onto rails?

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Posted on Jan 02, 2017

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Mikey108
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SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring

You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

Posted on Feb 24, 2009

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SOURCE: 1993 JEEP GRAND CHEROKEE LAREDO IM TOTALLY BAFFLED

Back up a minute...Do you have spark from the coil wire? (juice from coil) If so, change or check rotor and cap (wires do not all go bad at same time so unless they are wet, likely at least good enough to start engine)

Posted on Mar 05, 2009

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SOURCE: 1993 JEEP GRAND CHEROKEE LAREDO- TRUCK WONT

OK...I have a 93 outside...one diagram I have shows an ignition module next to coil...but there is none on mine, (4.0 engine)
Two items to check are crank sensor and cam sensor inside distributor. Test procedure can be found in just about any manual including haynes.
You will need a decent volt/ohm meter to do testing. You can also check codes by turning ignition switch on/off three times, leaving it on the third time. Check engine will flash code #'s (ex: one flash, pause two flashes= the number twelve.then followed by a longer pause then another set of flashes etc.)

Posted on Mar 05, 2009

  • 59 Answers

SOURCE: 1999 Jeep Grand Cherokee 4.0L mis-firing

Put new distributor cap and rotor at least

Posted on May 08, 2009

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SOURCE: 1999 Jeep Grand Cherokee Larado wont start.

If computer sees no crank sensor signal it shuts down pulses to the injectors. But, you bring something new into the mix. Make sure fender grounding is good so the relay can operate properly and make sure power going to it is not restricted by a loose or dirty contact on the power side.

Posted on Oct 23, 2009

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2 Answers

My 1999 jeep grand cherokee skips after changing the coil and spark plug,what could be the problem


get plug wire tester at parts store and test plug and coil wires if there bad change them to also did you check plug gap?

Nov 21, 2014 | 1999 Jeep Grand Cherokee

1 Answer

Where are the spark plugs


Locate the spark plug wires in the Cherokee cylinder head. In the 4.0 liter engine, the spark plugs are below the coil rail assembly. On the 4.7 liter engine, the spark plugs are located under each corresponding engine coil.


Read more: How to Replace Spark Plugs in a Jeep Grand Cherokee ' eHow.com http://www.ehow.com/how_4484626_replace-spark-plugs-jeep-grand.html#ixzz27zi6736d

Sep 30, 2012 | 2000 Jeep Grand Cherokee

1 Answer

I have a 1998 jeep grand cherokee with a 4.0 engine. As I was driving, the engine died. I have replaced the spark plugs, distributor cap and rotor, crank sensor, cam sensor and coil. It will turn over, but...


You really should be using a good manual as a guide fro testing. For wiring diagrams chiltons is better than haynes. Have you checked power flow through the ASD relay??

Jan 14, 2011 | 2000 Jeep Grand Cherokee

2 Answers

Where are the spark plugs located on a 2004 Jeep Grand Cherokee Laredo 4x4 4.0L


they are located on the side of the engine under the ignition coil rail. see pic of coil rail below483dd98.jpg

Oct 24, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Ok I have 2002 Jeep Grand Cherokee, I have replaced the spark plugs and the coil rail but still getting the code P0351 and I was wondering if this could be caused by some kind of sensor?


The code indicates the coil pack or spark plug is malfunctioning. You can test this using an additional person. by removing the coil pack and spark plug, place the spark plug into the coil pack and ground the tang on the spark plug to the engine. Have someone start the engine and watch for a blue spark. if there is no spark, then the coil pack is malfunctioning. There is also ways to check the coil packs using a multimeter.

also, bee sure you didnt crack the ceramic part of the plug during initial installation.

Aug 01, 2010 | 2002 Jeep Grand Cherokee

1 Answer

How do you replace spark plugs on 99 jeep grand cherokee


If it is a 4.0L, remove the 4 13mm bolts and lift up on the coil pack and flip it over. Remove your spark plugs and install the new ones. Put dielectric silicone in the boots and reinstall the coil pack. If it is a 4.7L, you have to remove the air box on the top of the engine. Each cylinder has it's own coil pack which is retained by a 10mm nut. remove this and the coil pack comes out. the 2 rear on the passenger side are harder to remove because of the transmission dipstick bracket. You will need a long extension to get the spark plugs out. Repeat the same procedure from the 4.0L installation. Hope this helps

Best of luck

Jun 12, 2010 | 1999 Jeep Grand Cherokee

3 Answers

1999 jeep cherokee 6 cylinder engine light


1.Plugs
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure.
Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
Hope this helps.
Thank you,
Lee

Dec 12, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Need guide to change spark plugs in 2004 4.0L grand cherokee


R&R COIL RAIL AND THE SPARK PLUGS ARE UNDER THE RAIL, BECAUSE EACH PLUG SHOULD HAVE ITS OWN COIL(COIL RAIL IS A ONE PIECE)

Nov 14, 2009 | 2004 Jeep Grand Cherokee

1 Answer

Spark plugs location


What engine 6 cylinder? If yes you have to remove the coil rail on the passenger side of the cylinder head.

Apr 04, 2009 | 2000 Jeep Grand Cherokee

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