Originally Posted by XxpeditionxJ
Take your Jeep to the local Jeep Dealer and they will install the heat shield for free with no questions asked.
Well went down to my friendly Jeep dealer and this is what I learned. Oh BTW they WON'T supply the part OR install it for free. It cost me $8.07.
Service Bulletin #18-031-03 Dated 9/5/03
Subject: 4.0L Rough Engine Idle After Restart Following a Hot Soak
Overview: This bulletin involves the installation of a fuel injector insulator sleeve.
Applies to vehicles equipped with a 4.0L engine (sales code=ERH)
Basicly is says 20-30 seconds of rough idle after a restart in hot 90* or higher.
" This condition may be caused by heat from the exhaust manifold that following engine shut down migrates to the area around injector #3 and cause a fuel vapor to form within the injector. This in turn may cause a momentary misfire of cylinder #3 until the fuel vapor is cleared of injector #3. The insulator sleeve lowers the injector temperture to a point below which the fuel will not normally vaporize."
Insulator sleeve part #56028371AA Ignition Wire Shield
It says this part will make 2 injector insulator sleeves.
Another Service Bulletin # 18-039-03 involves reprogramming the PCM to lower the temperture at which the electric fan kicks on. My past experience with reprogramming a PCM was a cluster f**k to say the least. It cut the MPG of the '96 Dakota I had by 6-8 mpg. So I'll leave this one as a last resort.
Hope this helps anyone else that has this problem.