is it a click that seems to be caused by a relay or is it a rattle? i have a rattle in the dash on the driver's side. it sounds like it is buried in there and my wife gets really mad at me cause i sit there slamming the dash with my fist at lights and on the highway (the only times it does it). i tried to explain to her that what i am doing is a very scientific, highly precise form of repair but she doesn't seem to buy it.
Could be just the vibration of the engine in drive rattleing something that is loose. Or it could just be the loud noise of the 4.0. thier known to be loud. mine rattles and clicks when its a cold start.
Doesn't seem to be an engine rattle. I say that because shifting into neutral stops it and then shifting back to drive (while stopped) does not make it start again. You have to start driving again for a bit then come to a stop. Weird...I know. It's more of an annoyance sound than any thing. Doesn't sound like a relaying sound or just a creeking sound. Doesn't make sense that I can shift to N to make it go away and then back to D and it doesn't come back instantly...
Could it be a heatshield or something else exhaust-related? Everything has a resonate frequency at which it vibrates, so a loose part might rattle at 900 rpm (when idling in gear) but stop rattling at 1000 rpm when idling in neutral.
Kinda hard to troubleshoot without being there to hear it. Maybe get the wife to hold the brake in gear while you poke your head around under the hood, behind the glovebox, underneath...
So I installed the flux capacitor but the Jeep just won't do 88 mph.
Even though it sounds like it's coming from the dash, could still be the EVAP purge solenoid. On colder days I can hear my EVAP solenoid clicking away from the cabin and it sounds like something in the dash. Now that summer is hear it is much less audible (or maybe I'm just more used to it).