Exalted85

Seemingly not speed based..I can be cruising at 80 with 20pct load and no problem. Doesn't seem to be rpm based either. I took it up a pretty big grade today..dropped od, I think I was going about 26 load, 13psi, 2100 rpm..no noise. I'm really starting to suspect od. It seems to come in randomly too, though..but only when I'm in the throttle. The rear drive shaft is spinning full time, right? If it was that, it should do it not just under load?

Honestly not sure..it sounds like it's coming from the front to me, which makes me think engine. Short of looking at it while running, anything I should do? This reminds me..my alternator housing came loose a little bit, and I had a clicking up front..solved by tightening it down..could this have damaged something? I'll try to do valves this weekend..I think it's raining tho, of course :/ provided I can get the cap off. when you say transmission..I was trying to reproduce it, and I almost think it's only happening in OD. I remember reading something about imbalanced drive shaft causing od housing to break, could this be happening? Would I just take it to a trans shop to dx? Did the wt mod, ac noise at all time low. I do get a random speed sensor code. Just replaced rear..replaced trans maybe 5k ago. Back plug feels a little loose to me, and it did have metal shavings..I'm assuming because I had the rear diff rebuilt recently..but the code still comes back. Generally not much..20pct load, maybe 5psi..I can't detect any boost leaks, but I'll try to take another look. I did note it was getting worse with higher load, which is also more boost..I think 45pct load / 15psi was going up hill. I have to drive a grade this morning..I'll try to video or take note

I think she's at around 215k Stock as far as I know..only smoke I get is a puff when it starts up. Stock hy35. I've actually been wanting to do a valve lash..but truth be told, I'm not entirely sure how to get the front cap off. I guess truck vents out back and has a "12v" cap up front. Not sure if it screws in or I pry it off..didn't want to break it, and it didn't seem to budge budge. Pop test involves removing them I'm sure? Big money? Heh.

Hi guys, I'm experiencing a woo-woo-woo noise. It seems it's coming only while the engine is under load, or it gets louder, with the more load. So..if I'm driving on the highway, and I go up a hill, it gets louder when the engine works harder. If I let off, it goes away instantly. It sounds like something is off balance to me, I'm just not sure what could be making the noise, only while the engine is under load. I pulled the front drive shaft. The wheel balancing weights are still on tires. Tires, brakes, rotors, hubs new in the last 15k or less..and this is a new development. Any ideas to look at? Here's a video..you can hear it pretty clear at 15 sec in.

So I'm dealing with a new issue. The truck is having some hesitation starting..and for some reason the alternator isn't kicking in for about a minute. Sometimes the voltage will drop off even after the alt has kicked in. I did the w-t mod..but I haven't put a new line from the pdc to the passenger side battery..I know this isn't supposed to be necessary, but could it affect anything like what I'm describing? This issue didn't pop up after the mod..It's been about a month. The only other thing that I can think of..is my gf used my truck to jump her car a couple times in the morning..I've never jumped anything before, and I wasn't present when she did it. Could the added load of jumping her car, whilst cycling the grid heaters on a cold truck, have caused any type of issue? Any ideas what could be going on here? Here's a video

So I'm getting really weird voltage drop, truck is hesitating to start a little bit..I'm seeing my voltage drop completely to under 12v, like the alternator just isn't working. Could this be because I don't have a wire from pdc to passenger? I can't confirm right now..but I think my driver side battery isn't charging. It's raining and I'm not at the house to check it's voltage..but I did see the voltage drop big several times..like to under 12v, almost like the grid heater was running of battery alone. That's not grid heater dropping it that hard, is it? Truck has always started strong..I'm thinking I've got an issue.

Does anyone know what this tap is tapping, or what it could have been used for?

So I found some weird stuff. Little black appears it goes straight into the apps loom..so it looks like they tried to rewire the apps ground wire to externally ground on the fender. If I had a terminal that size, I'd try to reterm it to see if that helped. However, I found some other weird tap sites. One on a purple wire leading to passenger side bundle..and one behind the engine kinda. Could these be contributors? Check out this video..I'm not exactly sure how to describe location. Any idea what these could have been for? Alt case checks in at dead zero ohms..Looks good. I actually at one point did bare a appt spot on the housing and ground to battery..it didn't help :/ I've sense gotten rid of it..but my alt ac noise appears to be good. Check out the video above..I think I'm finding the problems.

You were right about the noise..tested right now, averaged about 0.016..I did see it hit 0.02. It's a nation's alternator, probably 25k on it. Going to look into that ground and try to see if I can check voltage on apps and look for anything else that might look funny..but it's definitely looking like a timbo might be my next step. However, I have been getting a p0500 vehicle speed sensor code..just read that might be an issue too? I replaced the trans one recently, it was mucked up..had the rear diff replaced too at a shop during other work. I wanted to try to pull that to see if it had any collections on it..but was having a hard time getting it out a few weeks back.

I figured the red one was previous owners doing. I'm going to try to get bell housing off tonight and get rid of it. The alt on it was leaking ac when I got it, he was probably trying to fix the same issue I am. Hopefully the wt will fix it, and that addition won't be necessary anymore.

Surry, electrically challenged. Is that a stock ground then?

Weird..it didn't post. Here we go. I'll probably buy a timbo. I was thinking the same thing, mopar..I was expecting lower..which makes me think it might be an issue elsewhere somehow, but I'll check it again after I get home. Oddly enough, cruise control worked fine on the way to work..which might suggest that it's the actual apps intermittently doing it's job right. Here's pictures of the little wire. I'm assuming I should be able to get rid of it when I replace the apps? Actually, maybe I'll try to remove the wire first and see what that does for me.

I'll look into timbo..heard mixed reviews way back when. I saw my ac go as hug as 0.034 while warming up at 1100 rpm..averaged around 0.025..which is actually almost identical to what I remember it being before the wt mod. Do I need this little wire? I wanted to pull the apps cover off but will have to look into how..didn't have time with voter research. Could this little wire be causing grounding issues? That the wt should have fixed?

So, as I feared, the truck is still struggling to maintain highway speeds with erratic engine load. Watch the video on 1080p..you can probably hear the truck revving and dropping, but even if not, you can watch the engine load on my obdii cell phone in the top left gauge (shout out to moparman for sending me his obdii gauge file a year ago) and you can see the needle all over the place trying to maintain speed. 0-52, 25-50, etc etc..it's revving hard, dropping, revving, dropping. She as it used to. One curious thing I noticed while doing all that electrical stuff..is there seems to be a random wire, probably #18, going from a body mount in the front, grounding on the body in the same spot as a probably #8 ground coming off the driver side negative battery terminal. First pic shows location, second, you can see it heading into the apps loom. (I didn't know how hot that black plastic tube got, so I put some spare loom around the battery negative and the #18 wire) Is this little body mounted ground to tps factory? It doesn't feel seem like it. Could this be part of the problem?

Well..it definitely took me more than two hours..but I got it done right, I think / hope. Instantly I noticed when I started it..it idled at exactly the same rpm, rather than bouncing around. I was excited. Drove highway to get gas, no cruise control hiccups. When I started it back up after fueling up, the rpm was bouncing again..It ran home fine with cc again..so I'm hoping the rpm at idle bounce isn't an indicator that the apps is losing control again..so I'm still a little skeptical on that point. Usually when I reset, it takes a couple days to degrade. All in all, super stoked, learned a lot, and really appreciate the help along the way. Definitely not a two hour job for a rookie, haha.