97 2.5 has no spark coming from the coil

[Tooonz]

I’ve been working on my step son’s jeep since February. Long story which led to replacing the engine. Acquired a good used engine. Took the old one out, this project took a little while to do because I out new rings in the engine along with new bearings. So I may have forgotten where some ground wires go on the passenger side. I have 3 black wires going to one of the studs of the coil that attach to the block. All other ground wires are correct and everything is plugged in to the correct plug. I tried starting it and I have no spark.

I’ve checked power to the coil and I have power there. I did swap coils, same thing, no spark going to the distributor. I did put a new crank sensor in ( mopar ) so I can’t understand if that would be the issue, even though I have read it could be the Crank sensor.

I am at a loss, so I am reaching out for possibly a different view and some advice and what to look for.

 

[macleanflood]

You check the factory service manuals in the resources section...8W has the wiring diagrams and a list of all the grounds to check.

How's the battery? Fully charged?

How about the PCM plugs? Check them for corrosion.

-Mac

 

[Tooonz]

Hi Mac,

Yes the battery is fully charged, I didn’t mess with the PCM. I wish I had the service manual.

 

[macleanflood]

Hi Mac,

Yes the battery is fully charged, I didn’t mess with the PCM. I wish I had the service manual.

The service manual is available to download for free in the resources section. Do you need a link?

While you didn't mess with the PCM you should unplug the connectors and inspect them for corrosion.

-Mac

 

[Wildman]

STICKY Thread 'Jeep Wrangler TJ Factory Service Manuals (FSM) & Technical Documentation'

Apr 9, 2017

This post is for TJ documentation like Factory Service Manuals Etc..
A while back I was able to find the FSM for my 2006 TJ. I decided to look at the same website I have used to download FMS to see if I can find others. I hit the jackpot so I am sharing :beer-toast1:

Please if there are any issues or they are inaccurate let me know.

Thanks @UpperMI for the additional 2002 manuals

• JeepNWilly
• fsm maintenance manual owners manual pdf service manual shop manual
• Replies: 269
• Forum: TJ Resources

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[Tooonz]

Ended up being the crank sensor, brand new mopar one , junk.

Thanks for the help.

 

[macleanflood]

Ended up being the crank sensor, brand new mopar one , junk.

Thanks for the help.

That's the problem with new Mopar...all Stellantis junk from overseas with zero quality control and a strong investment in convincing you to get rid of your 29 plus year old vehicle and replace it with a brand new Jeep.

-Mac