ISX

I have a different take on this. High MPG means not stepping on the pedal, true, but what about in comparison to weight.. A train can move a ton of freight 423 miles on one gallon of fuel... I can move 3.3 tons 27 miles on one gallon. If I did their crazy logic and multiplied that by 3.3 so that it will get me down to 1 ton, I will be doing 89.1 miles per ton. Alright now lets compare apples to apples. I pull the trailer at 70mph, it loves it there, I get 21mpg without the trailer at 70, which means 21 x 3.3 = 69.3 miles per gallon per ton. With the trailer at 70mph, I get 16.5 mpg, but I am probably right at 10,000lbs combined weight, or 5 tons. 16.5 x 5 = 82.5 miles per gallon per ton. My efficiency is higher pulling a trailer at 70 than going 70 without the trailer. Now lets really give it a kick. I think Caj pulls more like, well we will say 20k combined and I think he gets around an average of 13 or so. That is 130 mpg/pt. Obviously the killer is aerodynamics. An enclosed trailer with nothing in it will not do too much better than one with 1 ton in it. Maybe some of you guys have noticed when you put a bunch of weight in the bed of the truck but don't change aerodynamics, your mileage hardly changes. Look at a train, it breaks the wind once and the 1000 cars behind it draft each other. Economy might come at less than 15% engine load, but mpg is just an illusion of economy. Miles per gallon/per ton tells the whole story. My moms car gets 30mpg, but oh wait, I weigh twice as much and get 27... So the way you stated would mean mines less efficient, but it is obvious that it is her car that is less efficient. It's like saying a semi truck is horrible because it gets 6mpg, but mpg/per ton at 80k lbs comes out to 240.. Just for comparison, moms camry comes in around 45 mpg/pt.

It's nothing but a mind game. If you overcome your need for speed, then you can go slow and have a better time doing it. I used to drive like you, only it was more like 80-90 on the interstates and well 80-90 on the highways too. Constantly watching for cops, constantly watching for deer, constantly holding on for dear life. I passed people left and right because after all, it is a cummins But I wanted to test out my mileage, and that required going slow. So I cranked up the radio, leaned back in the seat, set the cruise, took my shoes off, just relaxed. At first, it sucked. Everyone likes the thrill of showing what a cummins can do. But eventually, I got used to it a little more, and after a tank or 2 of driving like that, I went back to my old habits and it absolutely sucked. I never realized how much more attentive I had to be to go even 70mph. I said hell with that and have been driving slow ever since. The good thing is that I started going slow before I ever got any tickets/violations/anything. The other thing is that you don't gain hardly any time going fast, you waste money on fuel as well as the parts that are now wearing out faster.

That sounds right then. With the wire off, the wastegate will blow open the entire time. It is supposed to open at 23psi but with no plate or AFC, you end up outflowing the wastegate and building 30psi. Fuel pressure is still a little low though, maybe the fuel filter will fix it.

You still have issues. Your fuel pressure should never drop below 25psi when you are under a load. Mine never drops below 30 under a load. At idle I am at 18 or so. A clamped wastegate with no plate or AFC should send that turbo well over 40psi. I think you said you changed the fuel filter, did you check the screen on the fuel heater? It sounds like it might be a combination of bad overflow valve and bad fuel pump.

Here is what Mike doesn't show. If you look at his stuff, you see that everything is linear. So you would think 1mpg difference doesn't matter too much. In other words, he shows that going from 9 to 10mpg is the same increase in range as going from 26 to 27. Now lets look at it from a different standpoint, cost. Now you can see that it is exponential. Going from 20mpg to 25.7mpg yields the same cost difference as going from 9 to 10mpg. This is why I am trying to get my truck as efficient as possible while pulling our trailer. Just think of how much Caj would save if he gained 1mpg.

Well that sucks. I used a ground bus bar and it is about the only thing that turned out good. Now I gotta undo half of them.I can't believe everything worked though. I cut a LOT of connections out, a lot of connectors, a lot of wires I didn't even put back. Still, what a PITA lol. I am planning on drawing out a layout of every wire and getting it all on paper next time so I know how everything will work. It actually looks perfect from about the brake reservoir and over to the passenger side. I won't get into how the other foot looks

I got it done today. Well not really. I got it to the point that all I got left is the battery cable connections and alternator connection so I just jumpered it all up with jumper cables to see if anything actually worked.Everything somehow worked, EXCEPT, the WTS/WIF/Check Engine/GEN lights were all on, the RPM doesn't work, not sure what else, everything else seemed to work fine. According to the schematics, there is this "sensor ground" that shoots off the PCM to all those things I listed that don't work, well I said hell with that and just ran all of those to a normal ground. I am thinking it needs to go through the PCM for some reason. I didn't think it would matter but I guess it does. Will just have to use dads truck to pull the trailer tomorrow, at least its only 40 miles away. I will fiddle with it through the week and hopefully get it perfected.As for pics, ehhhh, it looks like crap. The wires are all too long, there are a million wires more than I expected.... I might take one later on in the week but I am to the point to where I just threw it together and am awaiting plan B. Now that I know what not to do I can do it right, but I think it will be a long time before I take it back apart, unless I buy another cummins.

I think it's a big city thing. I am pretty sure they do it in st louis and kansas city, but they hardly inspect anything around here. I know most states dont even have inspections.

What I know is the white smoke sounds like an issue. It shouldn't white smoke at ANY time other than startup. Black smoke is probably in the pump tuning and can be easily fixed. The problem is that I don't know how mechanically inclined you are. I think the timing might be off to cause that white smoke, or dirty injectors. I would check the timing first, that white smoke is not something caused from pump mods as those things would just cause more black smoke. I am betting the timing slipped and when you took it out and floored it per their advise, it made it slip even more, causing worse emissions.

I actually never care what traffic is like. I have held up 20 cars on the 2 lane highway going 55 in a 60 for 90 miles. Half of it is 4 lane so they could all pass me eventually. But the speed limit does not mean you have to run it IMO. My trucks limit is 3000RPM and I don't run that.. In theory, if there is a minimum and a maximum speed limit, you should run the average of them or the midpoint. The 70mph max and 40mph min on the interstates here mean a midpoint of 55, which I have done on I70 many times. That is a very busy interstate but its easier going 55 than 70. I could care less what other drivers think, the min is 40 so I am 15 over that.

You just had to pull me in here didn't you! I have experimented with different speeds for years. Driving to college and back every weekend for 2 years and driving to work and back on a 65mph 4 lane gave me a lot of time on my hands (college was 90 mile trip, work is 40 mile). I was trying to get better mileage or figure out how much each speed yielded. I went from 70 down to 45mph. I got 27 at 55, wasn't able to do 50 or 45 long enough to tell with that. I did do 45mph all winter for a tank and got 24mpg, but this was when it was 10F and it was actually so slow and so cold that I would never break 170F or even ever open the thermostat, the heater was taking all the heat. So I believe 55 is fast enough to get there and slow enough to get good mileage. There is something else I didn't realize until I did this testing. When you are on a 4 lane that you drive 65-70-75+mph on, just as Dorkweed said, you gotta pay attention and weave through traffic and all this other crap, it sucks. Now the 4 lane I was on didn't really have many people but at 55 on a road meant for 65, you could basically do anything you wanted in the truck and not have to worry about the road. You don't have to hold the steering wheel as tight and attentive. When I did 45 last winter, I loved it. No care whatsoever on what was behind or in front of me since it was coming up so slowly. I turned the radio up and kicked back and turned the heat all the way up until it was equivalent to a 90F day at the beach. Ever since that realization, I rarely break 60, I don't even remember ever breaking it. I don't like the way my truck sounds at 70mph anyways. That high in the RPM with no load just sounds the same as free revving it. It sounds perfect with a trailer or any kind of load, but the truck by itself isn't enough to strain the engine once it gets above 65mph since it is so high in the RPM so it just kinda sounds a little mad. I pull the trailer at 70, it likes it there for some reason, the inertia keeps the mileage up. My brothers dakota is a different story. I hold it to the floor all day long. It is so small that it's not like it takes any effort to drive it whether your going 10mph or 100mph.

I watched the video and wanted to try it out, then watch what happens when you click the big blue button that says try gmail motion.. http://mail.google.com/mail/help/motion.html :banghead:

http://quad4x4.com/filterkits.html#nv4500

I wish you all would have told me this a year ago, we would have had another 100 videos up :lol:It is a great idea and I think we will create the section and see what happens. The only thing is that the other sections are kinda the same thing. The other sections are not video specific though and just going through threads it is more of an input based thing rather than a full blown video/guide on how to do something. I think if the video bit of it is emphasized, it will be all its cracked up to be. Let me consult with the rest of the staff and see if we can come up with something final.

We can do that. I guess the thing is, we don't know all of what people want to see. I just had a thought of making a new section on the forum called video requests. Make the first post a sticky where people post their request on that sticky. Then the actual video will be a new thread entitled "Fuel Filter Changeout" or whatever they asked for. Anyone could reply with the video so it wouldn't just be Mike and I. I will then go through the sticky and edit everyones posts and add a link to their response video to their post, so then people just watching the sticky can click on the link to see the video about the requested thing. I don't have any problem taking my truck apart for the sake of someone else seeing how it's done. Any thoughts on this?

Put up some effort then.

I got a question for you guys. The videos me and Mike make seem to skip over a lot of the time consuming stuff and write it out instead. Would it be better if we just left the camera recording the whole time? I know we can edit bits and pieces out, like spending 5 minutes loosening a bolt. I didn't know you guys wanted to know things like changing the fuel filter and stuff like that. I could definitely get a lot of videos doing that. Changing oil, fuel filter, lift pump screen, etc.

I'll tell you what. For every picture you take of your engine, label every bolt socket size and what every single component is. You must be zoomed out far enough to have a minimum of 20 things to label. For every pic you do this on, I will raise your post count 5 posts. If you get even more specific (bolt length, thread pitch, bolt torques, component specs, etc.) there will be bonus "post count points". I will do this for anyone who posts pics meeting the minimum requirements I just set forth. NOTE**I will not do this for uninforming pics like of your grill and then you labeling every bug species on it.. If anyone wants to suggest a new bribe that I should impose, let me know. Labeled pictures are few and far between on the web and it would be incredibly worthy to have them. I might increase the bribe points upon going over this with the rest of the staff.

I forgot I had made an article on this. http://mopar.mopar1973man.com/cummins/2ndgen12v/p-pump/p7100-fuel-pressure.htm I also forgot I put that plug in that banjo bolt, I have been looking for it all month

I've had to track them all down so many times that I pretty well know how every single thing on that truck is wired. How big the wire size on everything is, all of it. So now I can add wiring to my list of things I'm not afraid to do anymore on my truck. I keep doing things like this because I want to know what to do when I end up on the side of the road. I haven't had a single problem with the truck but I am hoping my effort pays off and the whole thing leaves me stranded so I can have a chance to fix it. I don't see why I have to always fix everyone else's stuff, why won't mine break for once It's depressing really Bad part is, all I really have left to take apart is basically the p7100. I am a little sketchy on taking all the bolts out of it. I think it is simpler than I am thinking but I don't want it to end up costing me $1000 if I screw something up.

You have the same thing as mine, no fuel plate, no afc, both 215HP 5spds. If I clamp the wastegate I can get to well over 40psi. I wonder if you have a fuel restriction. A dirty fuel filter/bad lift pump/bad overflow valve/etc. can all degrade it.

Nawww, I have actually pulled that guy on his green bike, up rocks like in the middle pic, but about 30ft worth, with a 2wd 250 4 wheeler. Bad part was there were 4x4 4 wheelers having a harder time, and they weren't pulling 500lbs

Went to Chadwick,MO (Springfield/Branson area) over the weekend and went riding again. The last time I went there I thought it sucked, but for some reason I think I must have just went in a circle on the same 4 miles or something. We hit just about every trail there this time and I must say, it is very difficult but incredibly fun. I kinda have a thing for very difficult trails. There were piles of rocks for hundreds of feet that would knock your teeth out riding over them. Then there were the looser gravel trails that would take the whole bike wherever it wanted, those were the most fun to me. The guy I rode with had met up with his family from indianapolis along with another guys family who was supposedly very fast. I think I coulda passed him if I had more trail width. The first day it was raining but this place has so many rocks that it doesn't matter, except for the limestone that would turn into the equivalent of a sheet of ice. It was a lot of fun and I am going back on easter, if not earlier. Hoping to turn it into an every other weekend thing. I didn't get many pics but it should give you all an idea of what is there. The first pic is of the guy I rode with, spinning out on the limestone. I don't know why he thinks flooring it in 1st is going to help on a rock that is rounded perfectly over and slick as ice and from all the years riding with him, I have yet to see it work lol. Next pic is of one of the parts we had to get up. If you don't spin out you can be to the top in 5 seconds since you have to go fast to make it on those slick rocks. Last pic is all the bikes this morning, got some snow down there (Yes it was 80F there last week, unreal). Mines on the left, middle is his, green one is his old one (spare). Anyways, just figured I would share this with you guys. I shoulda got more pics, thinking about getting a helmet cam, that would be reallllly neat out there watching everyone go up all those rocks. I was going to just hold my camera but I am not good enough to hit all those rocks one handed, yet

If you're sure that part of it is working, then yeah just pull the switch. I think the oil is below the switch so you don't have to drain it. Just unscrew and screw the new switch in.

Actually yours was everything. The switch was bad, the CAD actuator was bad.. But John is right about the testing, it could be staying in 2WD if it has vacuum issues. This might help you http://mopar.mopar1973man.com/cummins/general/cad/cad.htm