Topic: Yet MORE coil problems...

[jfrabat]

I will take a look at it tonight and see if I see anything strange...  Thanks for the info!

[jfrabat]

Here are the pics of the coil; notice the cracking in the connector.  There is also some cracking in the white resin, although, becuase of the color, it was kind of hard to get that to show on the pics...

[grumpygy]

Have you ever replaced the electrical plug that goes into the coil.  Cause that was not the end I expected to show heat damage.

[sharpxmen]

Have you ever replaced the electrical plug that goes into the coil.  Cause that was not the end I expected to show heat damage.

x2, that looks like a bad connection, possibly internally in the plug so i agree with grumpy that you should replace the connector. that can be the actual cause of your problems.

[moparstroup]

yep thats the main reason the plug ends melt and usually dont see it with i dig volt meter. would need to do some kind of voltage drop test to confirm. just get a new connector and i bet you will be fine IMHO. i do remember this happening at the dealership. in fact i think we even stocked the pigtail ends

[Jeffy]

Yup, the bad connector is causing excessive resistance which is causing the plug to melt.

[jfrabat]

So where is a good place to buy said plug?

[Jeffy]

Junkyard probably.  Most Chrysler 90's cars and trucks should use a similar coil.

[grumpygy]

http://www.performancedistributors.com/jeep4.0.htm

Look at 31728-AH Kind of Spendy but cut one end  off and you have the end you need.

Will check a couple of other spots.

About the same cost here.

http://www.quadratec.com/products/product_search.php?kw=+17610.03&submit=Go&sv=&sa=1

[jfrabat]

One question (and I obviously dont know jack about electronics!): If I cut the wires and connect the new plug, wont that afect the electrical flow and cause other problems down the line?  I could not open the Qtec link (for some reason, my home internet does not connect to Qtec, and it's been like tha since I got to CR!), but I'll check the price from the office on Monday...

[dwtaylorpdx]

Just a data point, My 94 YJ has the same style coil and its mounted on the firewall.

The air cooled MSD (Looks similar) says not to mount it on the engine.

The connector is also used on many Ford cars. (Escort)

Napa has many of these connectors in their Echlin line.

The MPFI engines do not use balast resistors, nor do most air cooled coils.

Dave

[sharpxmen]

One question (and I obviously dont know jack about electronics!): If I cut the wires and connect the new plug, wont that afect the electrical flow and cause other problems down the line?  I could not open the Qtec link (for some reason, my home internet does not connect to Qtec, and it's been like tha since I got to CR!), but I'll check the price from the office on Monday...

don't you work for Sony 

it will be fine (re: cut the wires and connect the pigtail), solder and shrink wrap imo.

[jfrabat]

don't you work for Sony 

it will be fine (re: cut the wires and connect the pigtail), solder and shrink wrap imo.

You are right, but unfortunatly, I only know how to use, market, and sell them...   

Thanks for the confirmation.  I have some water proof connectors that I think I will use for this...

[grumpygy]

Just a little cheaper

http://www.thepartsbin.com/catalog/?N=&uts=true&Ntt=A35140021AH+1990+Jeep+Wrangler_-openp-YJ-closep-+Ignition_Coil_Adapter_Harness+Accel&tpbJeepigcoadhajeepwrangler(yj)19901995accela35140021ah1&tpbsendcid=tpbfroogle

[sharpxmen]

i wonder if this is why your PCM got fried a while back (if it did, i seem to recall you said something to that nature in one of your threads).