04 Wrangler Unlimited, 67 F100
Well written and well organized tech thread.
Part one is a little better:
I guess it could be possible that I'm on the front end of a valve failing, I've just never had one fail "some of the time" like the way this one is. In my limited experience, it has always been a light switch thing that tended not to fix itself once it failed.
Thanks for the suggestion though!
Nope, I'll try to grab one this weekend as we're heading out to wheel a bit so I'll have some road time ahead of me.Do you have a video of the miss?
Very likely the route I'll go at some point. I'll try to take the easy road first knowing full well that it never works out for me in the end :laughing:Would it be a bit less down time and fussy to get a good wiring harness from the JY and go through that? Then swap them out when you have some free time.
It seems like Ford cheaped out on the late 90's early 00's wiring on the trucks/suv's. I've had a couple of the RBV's now from that time period and all of them seem to have some odd wiring kinks, where the early to mid 90's stuff just kept on ticking even thought the harnesses looked more jank.*knock on wood, this kind of thing scares me (although mine is a 94) I am terrified of 90's ford wiring. "Hey lets put a 36 pin connector on the rear wiper and draw the main 12v from the transfer case"
do you have an EVTM for your year truck? If not, get on ebay and pick one up. for as old as it is, probably won't be much. I have one for the explorer, the ranger body, and the explorer the engine in the ranger came out of and still didn't spend 100 bucks on all of themIt seems like Ford cheaped out on the late 90's early 00's wiring on the trucks/suv's. I've had a couple of the RBV's now from that time period and all of them seem to have some odd wiring kinks, where the early to mid 90's stuff just kept on ticking even thought the harnesses looked more jank.
If it wasn't for the emissions aspect of this, I would just run a stand alone and be done with it.
Yup! One of the first things I buy when I pick up a project I plan to hold onto is a Paper Copy of the Factory Service Manual (including the wiring diagram books if separate). I often throw them in the the truck before our big long trips too as it's save my butt more than one time when out in the boonies trying to diagnosis something.do you have an EVTM for your year truck? If not, get on ebay and pick one up. for as old as it is, probably won't be much. I have one for the explorer, the ranger body, and the explorer the engine in the ranger came out of and still didn't spend 100 bucks on all of them
The only way I can get this thing to not miss is to pull out the camera apparently But I keep trying to catch it while it is behaving poorly.Do you have a video of the miss?
Don't hold your breath :flipoff2:I'm waiting for you to figure this out so I can see if I can implement the solution on my 4.0. I've had a slight blip at highway speeds (continuous highway RPM) ever since I swapped it in. It's mostly audible and hasn't seemed to affect performance, so I've just rolled with it forever.
Thanks for doing all of the legwork. :flipoff2:
Not to mine I haven't. When I had the intake off, I stuck a camera down in the lower intake and the upper intake half. I can't stress how clean this motor is. If I didn't know better, I would swear that it is not original to the truck given how tight and clean everything is... (now watch it window the block on the way home from work this afternoon)....*really dumb innernet question
Have you tried just Seafoaming the shit out of it? Don't wanna get your hopes up, but it solved my random 4.0 miss a few years back.
I don't ever pour anything in my crank case but quality motor oil.Seafoam scares me. I added some to my oil in my 3.0 and a week later all of the garbage that it freed ended up plugging my oil pump. Lost pressure and killed the engine. That's what initiated the 4.0 swap.
I suppose I could play it safe and keep it on the fuel/intake side of things.