Well the misfires never came back after that, so there are no faults as of now that I know of, I will scan it again anyways. I had that same thought when it was happening, maybe I got a bad injector, but after that it was just a huge loss of power when it got hot going up a trail.

I'll look up how to test the fuel pressure and the resistance too. I assume you mean resistance in the injector.

 

Get spark plug boots from Summit Racing

 

for me, it was a cracked spark plug ceramic that caused a miss. Easy to find at night the blue arc from plug to metal. Made a crack sound too. hairline crack did it, hard to see it, but it was the problem

As for hot soak, I got a 1990, no engine bay catalyst. friend has a 01 with the catalysts in engine bay, his gets much hotter. I even have a sound deadening, or anti hot hood blanket under the hood (factory installed) and his 01 does not. I suspect the factory removed the blanket to help get the heat out faster cause the later xjs ran hot engine bays do to the catalysts, but maybe the blanket was removed for other reason. .

If you dont have to deal with smog tests, well you can figure out what to do.

but give the ignition system a good going over in the dark, look for arcs of sparks around the plugs, wires, dizzie.

good luck

 

Problem: I drive around 20+ minutes, car is all warmed up in HOT Florida. Stop car, go into a store for only 5 or 10 min, come out try to start jeep and it won't or barely starts due to vaporized fuel at injector or in fuel rail or wherever it is ?
I replaced fuel injectors with New 4 hole ones from Precision engineering. They worked great, yet at same time, I thought I should replace the Heat shield that was way old and kind of fell apart, being 20+ years old. So I also got the
Design Engineering 010378 Fuel Rail and Injector Cover Kit for Jeep (1997-2004, 4.0L Engine). to correct problem. I read carefully investigated temperature controlled fan, Louvers in hood, On-Off manual fan switch , got a laser
thermometer, asbestos wrap on injector #3, and all the rest of injectors too. After months of trying everything I ever read or heard of to resolve this issue... I found what actually worked. REMOVE the darn heat shield and air can flow up
through the manifold pipes freely instead of getting blocked by heat shield and in fact causing the problem. Maybe the new 4 hole injectors help a bunch as well, Yet , After removing heat shield, NO more heat soak issues at all in 90+
degree Florida in July. Do Not buy the Fuel Rail and Injector Cover Kit unless you want to CAUSE a heat soak problem.

 

This is all you need. Turn the damn fan on AND KEEP IT ON