Question about 1996 Jeep Grand Cherokee

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I just changed the plugs,wires,distributor cap on my 1996 jeep grand cherokee limited, the firing order is correct,but my engine is misfiring&the codes that come up on my computer/scanner reads misfire in cylinders 1,2,3,6. what is wrong?

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I would manually set it up to top dead center. (Rotate the engine by using a breaker bar and socket on the crankshaft pully bolt the same direction as it runs) with the front cylinder, #1, assuming you have a 4.0 liter straight six, spark plug out. Put your finger in the spark plug hole, and as the engine is turned by hand, you will feel "air pressure." This is coming up onto the compression stroke. With the piston at top, you are at top dead center. (Zero aligned for timing marks) Now remove the distributor cap, your rotor should be pointing at the stud for the number one plug wire.
Turning it will then move the rotor to the next plug to be fired.

Posted on Nov 10, 2010

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1 Answer

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.

May 28, 2015 | 2005 Jeep Grand Cherokee Laredo

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I changed plugs and wires all in correct order 96 Gand 4.0L when i was done the truck ran like **** i so i had diagnostics done it gave codes 301 302 302 304 305 306 (all cylinders missfire ) then i...


if you are certain that the wires have been replaced correctly then you could have a bad set of wires even though they are new this happens sometimes but it sounds as if the firing order is off check the engines timing to see if its still in time.

Aug 22, 2010 | 1996 Jeep Grand Cherokee

1 Answer

I changed plugs and wires 96 Gand 4.0L when i was done the truck ran like **** i so i had diagnostics done it gave codes 301-306 (all cylinders missfire ) then i changed the distributor cap rotor and...


301 & 306 are cylinder #1 and #6 misfire. Your spark plug wires are not in the proper firing order in relation to the correct cylinder and distributor locations.

Aug 22, 2010 | 1996 Jeep Grand Cherokee

1 Answer

1996 Jeep Grand Cherokee 4.0 4 wd - changed wires, distributor cap and rotor - now it will not start? Did verify the firing and that all were plugged in correctly.


If the wires are in the correct order, also make sure that you used the correct starting point, otherwise the base timing can be off by as much as 60 degrees. Turn the engine till the crank damper timing mark is pointing to 0 or tdc on the timing scale. If the rotor is pointing towards the engine, turn one more time. #1 is roughly when the rotor is pointing towards the passenger headlamp. Order is in the direction the rotor turns when cranking. If the engine was running with no problems before the change, only other thing could be that you inadvertently unplugged something or the security system armed. Other possibility is that if you did the change due to a running problem, whatever was causing that finally failed.
If when you remove the cap again you find that the rotor is damaged, check the dist shaft for side play.
Are you getting spark?

May 25, 2010 | 1996 Jeep Grand Cherokee

3 Answers

Firing order diagram for 1998 Jeep Cherokee Sport


1998 Jeep Cherokee 4WD 4.0L MFI 6cyl

To avoid confusion, tag and remove the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes to reflect how your engine is wired.

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Fig. 1: The firing order can usually be found cast onto the intake manifold

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Fig.: 1989-98 2.5L engine Engine firing order: 1-3-4-2 Distributor rotation: Clockwise

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Fig.: 2.8L engine Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise

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Fig.: 4.0L engine Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise

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Fig.: 5.2L and 5.9L engines Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Also, here can review the Jeep XJ Service Manual.

I hope help you with this, Good luck (remember rated this help).

Oct 13, 2009 | Jeep Cherokee Cars & Trucks

2 Answers

I need the firing order & diagram on the distributer cap to the spak plugs


If your engine is a V6 I need to know the size to help you.

If its the V8 engine the firing order should be 1 8 4 3 6 5 7 2 in the order of rotation on the distributor (clockwise) Your model should have the # 1 marked on the cap and as long as no one has had the distributor out and put it back in a little off, It should be where its marked. If its not marked by the hold down for the wires to the cap, then (all things being correct) you should have the number 1 pointing towards the front. Number 1 normally points to the number 1 cylinder. On GM cars the furthest forward head is the Odd bank and the other head the Even bank. So the furthest forward bank would be 1 3 5 7 and the other side of the engine is 2 4 6 8.

I dont have a picture but this explination should help.
Hope this helps you get going again.

Sep 24, 2009 | 1984 Pontiac Grand Prix

1 Answer

Miss Firing


You might have a small leak in your vacuum system, check all of the hoses and plugged vacuum connections. Check your plugs and wires, distributor cap and rotor. Sometimes a crack in the distributor cap will cause carbon to build up. Since carbon is an electrical conductor it might be jumping from one cylinder to another that is not in line with the firing order.

Jul 10, 2009 | 1998 Jeep Grand Cherokee

1 Answer

Spark plug wire to distributor hook up


this should help: http://autorepair.about.com/library/faqs/bl764h.htm62417052.gif

Sep 06, 2008 | 1996 Jeep Grand Cherokee

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