Jeep 2002 Grand Cherokee Laredo 4WD Logo

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Roy Simanjuntak Posted on Sep 02, 2017
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No firing by spark plug wire for 2002 jeep cherokee laredo 6 cyl. 4.000

Yesterday I was drive my car, the road is going up,suddenly the engine was off,its looked like miss firing, after a few minutes I try to start the engine run over. The next day in the morning when I go to church,the car it doesn,t want to start and then I checked on the sparkplug wire no firing,No electric before coil and after,Please Mr.Mechanic Help me,Thank,'s GBU!

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Lawrence Oravetz

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  • Jeep Master 10,558 Answers
  • Posted on Sep 14, 2017
Lawrence Oravetz
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Joined: Jul 28, 2008
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The ECU or some engine sensors have failed. Run a diagnostic test to find out which part is causing the problem.

5 Related Answers

Anonymous

  • 141 Answers
  • Posted on Jan 25, 2009

SOURCE: cars dies while running

Maybe it's the ASD relay? Also (sorry) the PCM! I hope this could help. Take care and best wishes to you.

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Anonymous

  • 6 Answers
  • Posted on Mar 17, 2009

SOURCE: #3 cylinder miss firing--2001 jeep g.c. larado

check from the spark plug back...

Anonymous

  • 50 Answers
  • Posted on Apr 15, 2009

SOURCE: 93 Jeep Grand Cherokee Won't start

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

Anonymous

  • 24 Answers
  • Posted on Apr 29, 2009

SOURCE: 1993 Jeep Grand Cherokee engine problem

If the crank sensor (reaR at bellhousing) is dirty, will not start, clean up and visually inspect

Jonah Oneal

  • 14092 Answers
  • Posted on Apr 23, 2010

SOURCE: I have a 1994 Jeep Grand Cherokee Laredo 6 Cyl.

CHECK ASD RELAY THAT IS AUTOMATIC SHUTDOWN RELAY IN THE POWER DISTRIBUTION CENTER UNDER THE HOOD IN ENGINE COMPARTMENT.IF ASD RELAY GOOD PROBLEM COULD BE CAMSHAFT SENSOR IN THE DISTRIBUTOR.TO SAVE TIME AND MONEY HAVE JEEP SCANNED FOR CAMSHAFT SENSOR AND CRANKSHAFT SENSOR FAULTS.

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0helpful
1answer

I have a 2005 Jeep Grand Cherokee Laredo it misfires when idleing I changed the plugs yesterday it didn't start doing that until I changed the plugs

Carefully check your routing and make sure that all spark plug wires are attached to the correct spark plugs otherwise your firing order will be mixed up and cause the issue you are having. Also make sure that the wires are firmly seated on the coil packs or distributor, whichever is on your vehicle.
2helpful
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Need wiring digram from spark plugs to distributor cap

Review the Jeep ZJ Repair Manual in the Firing Order (page 10 and 11) for 4.0L 6-cyl and 5.2L 8-cyl.

I really hope hepled with this (remember rated this help) Good luck.
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95 jeep grand charokee laredo hard to start,

Check your spark plug, wires, distributor cap and finger. If you spark plugs older than 15000ml, replace them. To check your spark plug wires, use a tester (U can buy at any auto store) you hold direct on the wire and a small sparkling will show you if the wire works or not. You can check the wires also with this: use a single spark plug (don't remove one out your engine!), remove the wire from first SP, connect it with the single SP, hold it to ground, let someone start your engine...you need to see regular sparks.. do this step by step with all 6 wires. If all wires are fine, check the SP's, If you miss on one wire, replace the wire, if you miss on more than one, chekc the distributor cap and finger. If this items are older than 20000ml or 5 years, replace them.
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Spark plug wire sequence foor a 3.1

No 3.1L but choose the one that is yours.....

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2.5L Engine Firing order: 1-3-4-2 Distributor rotation: clockwise


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1999-04 4.0L Engine Firing order: 1-5-3-6-2-4 Distributorless ignition system

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4.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition

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5.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition
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I need the spark plug wiring for a 1993 jeep 4l from the engine to the distributor inline 6 cyl

The firing order can usually be found cast onto the intake manifold
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4.0L engine Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise
42e3dc6.jpg

Good luck (remember rated this help).
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99 jeep cherokee died going down the road. will not start. has fuel but no fire

Check spark to plugs. Possible crankshaft position sensor. Located at rear of engine between engine and trans.
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Causes for no spark on 94 jeep cherokee please

Well it could be many things, But have you relpaced the dist. cap and rotor, within the last 15,000 miles or wires and plugs??? next step is the coil ? then it gets fun. like timing. but I think most jeeps with a Inline 6 have a bullet proof engine for the most part. As we all know there is plenty of semi's on the road. well the same set up is there. as an Inline Jeep. I would have to say 90% of semi's on the road are inline 6 cyl. engines. and may of them go to 1million miles.
so plugs,wires, cap, rotor and ignition coil. that is a good starting point.
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Spark plugs

Firing order for the 4.0L 6-cylinder is as follows:

1-5-3-6-2-4

As for the spark plugs, it looks like the Autolite AL 985 plugs are what you need. If you are going to replace the plugs, might as well also replace the plug wires, the distributor cap and rotor (if you have those, I dont recall which year they went to the distributorless ignition).
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