TJ is misfiring worse after replacing distributor

[Keith J. Mundil]

I’ve been having problems with the jeep running rough and bouncing rpms while warming up after replacing the crank and cam shaft position sensors. Took it to a certified mechanic and they said it a problem with the distributor, so I figured I’d replace the whole thing.

I placed the crank to the 0 mark after cylinder 1 compression stroke and dropped the distributor in where it’s seems dead center of 1 on the cap.

Rough to start but went to drive it starts acting up at 2000 rpms and the flashing CEL pops up. Took it straight to autozone. Misfire in cylinders 1 and 4 and random misfires.

 

[Wildman]

I’ve been having problems with the jeep running rough and bouncing rpms while warming up after replacing the crank and cam shaft position sensors. Took it to a certified mechanic and they said it a problem with the distributor, so I figured I’d replace the whole thing.

I placed the crank to the 0 mark after cylinder 1 compression stroke and dropped the distributor in where it’s seems dead center of 1 on the cap.

Rough to start but went to drive it starts acting up at 2000 rpms and the flashing CEL pops up. Took it straight to autozone. Misfire in cylinders 1 and 4 and random misfires.

A little more information would HELP. What year? Engine? Transmission? Mileage?

 

[Keith J. Mundil]

97 Tj 4.0 112k I don’t know the transmission

 

[Wildman]

Manual or automatic?

 

[Keith J. Mundil]

Manual or automatic?

Auto, sorry I’m flustered rn.

 

[Wildman]

Watch this video and verify this is what you did.

 

[Keith J. Mundil]

Watch this video and verify this is what you did.

Yes sir, this is the video I used to do it.

 

[Wildman]

What spark plugs are you running? Have you replaced spark plug wires? The distributor cap & rotor?

 

[Keith J. Mundil]

What spark plugs are you running? Have you replaced spark plug wires? The distributor cap & rotor?

New Ngk resistor spark plugs and new Acdelco wires about 7 months ago

 

[Keith J. Mundil]

New Ngk resistor spark plugs and new Acdelco wires about 7 months ago

A duralast gold distributor is what I installed today.

 

[Wildman]

Autolite APP-985 is the recommended plug around here. Do you remember the NGK plug # you used?

(4) What are the best spark plugs for my Jeep Wrangler TJ 4.0? | Jeep Wrangler TJ Forum

 

[Keith J. Mundil]

Autolite APP-985 is the recommended plug around here. Do you remember the NGK plug # you used?

(4) What are the best spark plugs for my Jeep Wrangler TJ 4.0? | Jeep Wrangler TJ Forum

Fr5-1 stock no. 7253

 

[Wildman]

Part Finder (ngkntk.com)

Do you mean a 7252?

 

[Keith J. Mundil]

Part Finder (ngkntk.com)

Do you mean a 7252?

 

[TJ4Jim]

A duralast gold distributor is what I installed today.

The Factory service manuals provide a simple step by step procedure for distributor installation specific to your engine, I would go to the resource section and download the proper file and carefully review the process.

 

[Wildman]

The Factory service manuals provide a simple step by step procedure for distributor installation specific to your engine, I would go to the resource section and download the proper file and carefully review the process.

https://wranglertjforum.com/attachments/1997-jeep-wrangler-tj-factory-service-maniual-fsm-pdf.77148/