Just replace the melted stuff. Likely an injector leaked a little fuel. Replace injectors. I had a couple melted harnesses myself before. Not from a short or anything though.

 

Another

 

That doesn't look good. Yea, "just replace the melted stuff" - easier said than done. But did find the plastic rail and harness from Lowrange2 here on the forum. Will most likely take the time to replace the fuel injectors. Looking at the rebuilt injectors extrashaky referenced earlier...

Curious - if most folks here have had good luck with the rebuilt injectors. Costs seem reasonable. Thinking the 4-port are just fine, no need to go with 12-port.

Suggestions welcome on fuel injector replacement. Looking at the procedure it looks pretty straightforward.

Thanks.

 

Yes, and yes.

And yes again, IMO.

Yes again. Make sure to lube the o-rings. Clean engine oil works fine.

 

Got my rebuilt injectors from a guy in Fla off eBay. Some of the best money spent on my XJ. Very satisfied with improved performance and runnability.

There's a write-up available from dukie564 for the replacement procedure. Took me ~1.5 hrs at a leisurely pace.

 

May be easier said than done but just saying don't get discouraged by a little melted harness. Sure it's a pain but worth it. And the harness is only two of the three plugs on the ECM, all the sensors, injectors and a small section to the transmission and a ground. May not be the easiest job but with a little patience it's fairly easy compared to a lot of other repair/replacement procedures.

 

Thanks - just being a little sarcastic. This should work out - looks like I found the harness & plastic rail in fairly good shape.

Hopefully replacing the harness and injectors and things will be good as new!

Really appreciate the advice/comments/feedback here on the forum! Everyone has been extremely helpful.

 

It's what we do.


Well, when we aren't being sarcastic and generally giving a noob a hard time, anyway.

 

All,

Another quick question - have a used wiring harness coming in the mail. This should be the complete harness that runs through the plastic rail in question.

Since I'm sure the fuel injector connections will not be marked/labeled off the replacement harness, what's the best way to determine which connection goes to which injector?

Hopefully there is some way to figure this out...

Thanks.

 

Kinda of thinking you would be able to tell just from where the connectors fall when you lay it out. I have the harness I pulled from a '00 Federal Emissions one just recently. I did mark the injector connectors. Maybe a picture of that it will help you? Let me know.

 

After searching for a while last night - did find a thread where this was answered:

https://www.cherokeeforum.com/f2/fue...quence-183297/

Here's the diagram that was referenced:

 

The wires should be color coded with colors and stripes. I would think you could just match up the wires by color, unless they changed from year to year. I would at least expect the wire colors to be the same from '97 to '01.

ETA: I didn't see tb24's post before I posted. You can see the colors listed in that diagram (WT/DB, TN, YL/WT, etc.).

 

So this is interesting option. Got another harness but will still need to clean up and rewire/splice a number of connections - I wonder how will these heat shrink solder connections hold up in the heat of the engine under the hood?

Looked through the Q&A and feedback on amazon and even searched the web but can find no comments regarding durability for use under the hood near the heat of an engine.

Would hate to go through the trouble of rewiring the harness only for it to fail due to the environment under the hood.

Anybody have any experience with these type of connectors?

Thanks.

 

I had the same concerns as you, but couldn't find any data from "Monolit".

Here are the specs posted on Amazon:

Seeing that minimum solder melting temperature, I would say underhood temps should be OK in a wiring loom as long as you stay away from the exhaust. Around the perimeter of the engine bay where all the wiring is should be fine at least.

 

Unfortunately, this be over the top of the engine above the intake manifold and along the valve cover. Take a look at the pic's in the first post of the thread...

They will be protected in a wiring loom but not sure if this will be enough. Maybe me just being overly concerned with having to rewire after I fix this mess.