Abyx Posted March 22, 2012 Share Posted March 22, 2012 So, call me crazy, but I'm pretty sure that the time of day should have nothing to do with the operation of a vehicle....right? Right? Well, either it does, or my Jeep is infused with the angry spirit of what I'm going to assume is a woman; she's already punched me in the mouth(Swaybar miraculously fell and hit me in the mouth...was spitting blood for an hour), left me stranded twice and then continues to demand I give her what she wants. This does NOT happen during the day; but I'll be driving and completely random, the truck sort of jumps. It feels like an automatic transmission is shifting really hard, or that the rear tires leave the ground for just a moment. Following that it drives completely like normal; my tach shows no change, nothing seems to actually happen...except the automatic transmission that I didn't know that I had feels like shifting. This happens under acceleration, under deceleration, during cruising; it happens with all brands of gas, happens if I have a load in the bed, a passenger, ect ect, it will happen at ANY time; and mostly on long dark roads when I'm alone. The only way I can narrow it down, is that it doesn't do it if I'm off the gas...and at night. Has only happened once during the day; happens at least 3-4 times at night just about every night. I'm not even sure it's a problem; but does anyone have an idea? I don't have an O2 sensor or a functioning speedometer; that's the only thing I can even relate to the problem. Link to comment Share on other sites More sharing options...
cruiser54 Posted March 22, 2012 Share Posted March 22, 2012 Headlights on when this happens? Link to comment Share on other sites More sharing options...
Abyx Posted March 22, 2012 Author Share Posted March 22, 2012 Headlights on when this happens? It's happened with them off; but most of the time yes. I'm running a 100amp Alt and a Optima redtop on the stock wiring harness. Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 22, 2012 Share Posted March 22, 2012 Ambient temp difference. Link to comment Share on other sites More sharing options...
cruiser54 Posted March 22, 2012 Share Posted March 22, 2012 Headlights on when this happens? It's happened with them off; but most of the time yes. I'm running a 100amp Alt and a Optima redtop on the stock wiring harness. Ever refreshed your grounds and added a couple? Cleaned your C101 connector? Link to comment Share on other sites More sharing options...
Abyx Posted March 22, 2012 Author Share Posted March 22, 2012 Ambient temp difference. What would that attribute to?? I don't quite understand. Ever refreshed your grounds and added a couple? Cleaned your C101 connector? As a matter o'fact I have. All the engine harness sensors were re-cut, re-crimped and soldered at the factory splices when I tore apart my harness to fix the melted O2 sensor wires. I didn't add any grounds; but according to my multimeter I don't have any resistance issues, so I didn't see fit to add grounds. The C101 connector was cleaned twice, as well. Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 22, 2012 Share Posted March 22, 2012 Ambient temp difference. What would that attribute to?? I don't quite understand. Ever refreshed your grounds and added a couple? Cleaned your C101 connector? As a matter o'fact I have. All the engine harness sensors were re-cut, re-crimped and soldered at the factory splices when I tore apart my harness to fix the melted O2 sensor wires. I didn't add any grounds; but according to my multimeter I don't have any resistance issues, so I didn't see fit to add grounds. The C101 connector was cleaned twice, as well. Depending on where you are.........we have swings of 40+ degrees day to night. What ever is happening is caused by something other than light or the lack there of. Link to comment Share on other sites More sharing options...
Abyx Posted March 22, 2012 Author Share Posted March 22, 2012 Depending on where you are.........we have swings of 40+ degrees day to night. What ever is happening is caused by something other than light or the lack there of. Of course, what I meant was what do you think that could do to presumably the engine? The temperature has been rather warm lately; staying warm even into the night. Tomorrow it's supposed to be 80* out. I'm not even sure that this random occurrence is even an issue...it could just be a 'ghost' in the machine kind of deal. It's just very strange, and I've never encountered it before. Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 22, 2012 Share Posted March 22, 2012 Just my guess- TPS Link to comment Share on other sites More sharing options...
cruiser54 Posted March 22, 2012 Share Posted March 22, 2012 Just my guess- TPS That's a real possibility. Might have a bad spot in it. As to the grounds, ohming the grounds is great but it seems as if this gets worse with current load like when the lights are on. Therefore, the ground may say 0 ohms when you test it, but while putting a heavier load on that system with lights etc, they're inadequate. Heck, they were inadequate from the factory. Link to comment Share on other sites More sharing options...
Abyx Posted March 22, 2012 Author Share Posted March 22, 2012 I did plan to upgrade my grounds in the future, but for now I'm going to have to leave them. My TPS did adjust very oddly...I tested it and got a refrence voltage of 4.87, so I adjusted it to 0.82v(originally 0.54v)...caused a screaming idle, I had to adjust it back down to 0.48v and it idles pretty good now. Link to comment Share on other sites More sharing options...
ajpolitz Posted March 22, 2012 Share Posted March 22, 2012 It's Jersey. No real reason, just Jersey. :rotf: Link to comment Share on other sites More sharing options...
carnuck Posted March 22, 2012 Share Posted March 22, 2012 It's the Jersey Devil Link to comment Share on other sites More sharing options...
cruiser54 Posted March 22, 2012 Share Posted March 22, 2012 I did plan to upgrade my grounds in the future, but for now I'm going to have to leave them. Why? It costs less than $20 and takes less than an hour. Link to comment Share on other sites More sharing options...
Abyx Posted March 23, 2012 Author Share Posted March 23, 2012 I did plan to upgrade my grounds in the future, but for now I'm going to have to leave them. Why? It costs less than $20 and takes less than an hour. No time right now, hah. The same reason my jeep still doesn't have a properly calibrated tachometer, or a functioning speedometer, or front and rear matching gear ratios. New Jersey does have it's strange ways... Something I noticed today; generally when this happens it tends to be very foggy out...could this be related to the MAP sensor? Because I have a spare. Link to comment Share on other sites More sharing options...
raviolli Posted March 23, 2012 Share Posted March 23, 2012 UFO's man....theyre out there :dunce: They might not have a beam of light yet that's powerful enough to suck up such an awesome machine, but they sure are trying. either that or theyve already had their way with you and erased your memory.......again....and again and again try wrapping your MJ in tin foil :peek: Link to comment Share on other sites More sharing options...
cruiser54 Posted March 23, 2012 Share Posted March 23, 2012 I doubt it's the MAP sensor but it's quick and easy to change.... Fog, moisture, grounds? Oh my!! Link to comment Share on other sites More sharing options...
Abyx Posted March 25, 2012 Author Share Posted March 25, 2012 Oddly enough, the chuga-lug has seem to have disappeared. I changed my oil and fixed my speedometer cable...that's about it. Oh and yesterday I added a ground from the battery to the radiator support; but it hasn't happened since this past Thursday to begin with, so I'm not positive here. Either way, thanks for the suggestions guys! Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 25, 2012 Share Posted March 25, 2012 I added 4g cable from battery to dipstick, also soldered ground cluster at dipstick. Also I got rid of the useless ground strap, engine block to cowl, and added 4g cable. All cables are have soldered ends, crimped ends are half-assed. Don't know if the added ground to rad support is of value....? Link to comment Share on other sites More sharing options...
shawn Posted March 25, 2012 Share Posted March 25, 2012 its your back brakes. one of the pads is broken and its periodically getting jammed up and freeing itself, thus creating the " hard shifting auto" feeling. my $0.02. Link to comment Share on other sites More sharing options...
terrawombat Posted March 25, 2012 Share Posted March 25, 2012 Don't worry, you're not alone. When I crossed over the DE-NJ border yesterday in my MJ, the right front tire blew out and the truck veered to the right, went through the Delaware Memorial Bridge guardrail and is now sitting on the bottom of the Delaware River. Luckily I was able to eject myself from the vehicle and do a several barrel rolls to avoid from being hit by on-coming traffic. I think that NJ no longer wants me so I hitch hiked back to MD. Link to comment Share on other sites More sharing options...
cruiser54 Posted March 25, 2012 Share Posted March 25, 2012 I added 4g cable from battery to dipstick, also soldered ground cluster at dipstick. Also I got rid of the useless ground strap, engine block to cowl, and added 4g cable. All cables are have soldered ends, crimped ends are half-assed. Don't know if the added ground to rad support is of value....? Yes it is. Supplements the head to firewall ground which we know is crappy on a good day. Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 25, 2012 Share Posted March 25, 2012 I added 4g cable from battery to dipstick, also soldered ground cluster at dipstick. Also I got rid of the useless ground strap, engine block to cowl, and added 4g cable. All cables are have soldered ends, crimped ends are half-assed. Don't know if the added ground to rad support is of value....? Yes it is. Supplements the head to firewall ground which we know is crappy on a good day. As stated. Link to comment Share on other sites More sharing options...
Comanche County Posted March 26, 2012 Share Posted March 26, 2012 Its ironic you wrote that Terra, I had something similar happen to my MJ. Yeah, I was going to visit a girl I know in Jersey. Decided to make the long drive in the MJ, I got in and cranked it up. The MJ was running sweeter than a honeybun, then as soon as put the Jersey address in the GPS, it started backfiring badly and refused to go into any gear, I started yanking on the shifter and it broke off in my hand, then suddenly and all at once the clutch line blew, accelerator and brake pedals broke off, side view and rear view mirrors fell off, the windows fell off the rollers down into the doors, it blew every fuse and died. I fixed it all but when I tried to get back in the doors were locked and my keys were still in the ignition and the e-brake was frozen to the floor. I swear every word of that is true. :D Link to comment Share on other sites More sharing options...
Abyx Posted March 28, 2012 Author Share Posted March 28, 2012 Easy on the Jersey hating...I try to look past it's horrible legal system and it's high taxes...I quite like the scenery around here. :D Link to comment Share on other sites More sharing options...
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