woodtrucker

Wow That's awesome! I hope I can drive this truck from 82k to 382k! Congrats on a good long ownership of one of the greatest automobiles of our lifetime for doing work! I'm a truck guy so owning one of these is like a corvette would be to some people! Love it!

Well I don't know what it was like with HO. I've only owned from 82k to the currently108k miles. It had the SO pump on it the whole time I've owned. I have some timing shutter in winter weather and don't know if SO pump is making it worse but I'm working around by running a winter front. It helps it run strong in weather below 40 degrees but I'm still experimenting with it.I think Edge EZ is adding enough time my advance to cause this winter shutter issue. I don't think I have.any issues from SO that I can tell. I'm really excited to get the whole truck painted this spring. It's a great truck and I plan on keeping many years!

Thanks everybody, Hawkez, Sorry my signature wasn't working. I got it working now. Here's what I got so far. 2002-HO CTD,4x4,QCSB,4" DP -5"exhaust, NV-5600 6 speed,3.55 gears, Anti-Spin Rear Diff, Fass DDRP 02,VP44(SO), isspro EV2 gauges, Edge EZ, RV275's,tire size: 265 Michelin MS/2's,Crank Case Vent Mod, 16100 lbs gross-28ft 5th wheel Latest mod's thanks this awesome forum: running 1 oz/gal of TC-W3, have replaced almost all my rusty brake lines with Ni-Copper hard brake lines, resealed power steering/vac pump. Next Mod's: BHAF-coming soon to go with my winter front to get Intake air a little hotter in winter to help with the winter timing blues. Paint-Hood is in primer. Praying the rain holds off for fixing top of cab dent and putting top in primer tomorrow (Supposed to be mid 50's tomorrow!!!), and saving bucks(half way there already!) for a new fresh coat of paint (omni plus all the way) this spring before camping season starts up. Dash-Hopefully around this time next year I'm gonna yank the dash, replace heater core (since I'm in there and it's prone to spring a leak) and put a brand new dash in. Still better than a truck payment on a $60k truck that's way harder to work on than the ole mule!

I found this post on another site the other nite after hours of looking for people with similar problems just to see what others have learned. Looks like nobody has complete solution although the winter front was not mentioned so I'm interested to see how the rest of winter plays out with my front in and unloaded travel. shudder under acceleration

Don't think I've ever introduced myself on here so here goes. My name is Scott and first I want to thank everybody for such kindness and great feedback. I really look for that in a forum. I don't cuss, don't drink (maybe a beer or two per year though some of my truck mods/repairs I've done should have required whiskey!) I'm happily married for 16 years and have 3 wonderful kids (11, 9, & 6). We cannot emphasis how much we LOVE camping trips together and that involves pulling with the ole mule. I'm happy to say today that I got my first compliment on my rig from a co-worker who is a chevy guy. He said that it was the best running 2nd gen he's ever been in! I own an outdoor wood stove that keeps me busy hauling wood in winter to keep us warm at home. I work in the aerospace and ocean engineering machine shop on campus at Virginia Tech as a senior mechanical designer. If I can ever be of assistance for things needing machined, please pm me. We have some flexibility here to help people out on jobs when we are real busy doing university work. Thanks again for the great and reliable expertise here on my '02 HO cummins. God Bless! PS-I worked really hard for this massive load of wood so I thought I'd show off the ole mule doing some work!

Mike, Could you easily list the ranges you set for torque, hp, coolant temp and intake air temp? I like what you did with each of them but don't know what they all should be for stock. Also, how do you set up engine load? One other thing, I put teh vol. eff in and the brake spec fuel consumption. Not sure but does tq and hp gages need anything specific on set up to be sure they are reading correctly? Thanks, Scott

Just blocked off the grill and took a drive. Best the truck has ever run under 40 degrees running at 36 degrees outside. It seemed to be right at the cusp of giving me the stumble though. I might have felt it just a little on the ramp up from 155 to 195. But seemed to go completely away when truck was up to temp. I think the winter front added 10 degrees at most at these temps. Most importantly the truck ran better. I think I might go ahead and put a BHAF in so it can rob some of the warmer air that builds under the hood. Then in summer towing if the egg's run a little warmer than normal, I drop in a heat shield to protect BHAF from sucking in too much hot air. With winter fronts out of course! Can't get data from scan tool for ambient temperature. Need to figure out why that's not working. Ohh well, I seem to finally be getting somewhere. I'm gonna definitely call this issue a timing advance issue and if I just get IAT up a little closer to the good range the truck should run like a champ year round or at least anytime I'm above 30-35 degrees hopefully! Thank for all the advice and direction! I did find an old thread from turbo diesel resource that had HO cummins owners seeing the same issues. No resolution was ever revealed in that particular thread but it was nice to know a few others have experienced this.

can't imagine if that wind speed ends up going up to about 10-15mph. That's like a -50 wind chill. sheesh. I wouldn't even want to go to get outta bed...

Dang that's way down there! I'm not sure my truck would even run with the timing advance I have and that cold. It ran like crap the last few days of teens. Well I'm at 50 degrees intake air. I didn't block off intercooler. I stuck the carboard between it and radiator which doesn't really help me at all except keep air hotter around engine. I'll block off the grill and do another test run and see what the IAT ends up being before I spend money on a BHAF. Based on what I've learned with thanks to your advice and your numbers plus what my truck ran at this morning to work, If I can add another 10-15 degrees with a winter front, then that should allow my truck to run without issue down to about 25-30 degrees versus the sputtering it does at 40 or below outside. Dang you live in the cold weather. I hate the cold here, so I couldn't imagine the cold there! brrr.

I'd say! I was fooling around and plotted this for my trip to work this morning 4-6 degrees ambient. The winter front obviously didn't help much on intake air temp and that's what is used to set up timing advance. So with that said, I guess if I put a cold air intake in with a winter front, I suppose that would probably raise intake air temps enough to make a difference in the timing advance by taking some engine air along with fender air.Just an idea. I'm beginning to think based on your comment about HO trucks liking more fuel/injectors rather than more timing, that I should get a tuner that taps fuel and try to replicate the hp/tq I'm gettting with EZ/RV275 set up with a system that taps fuel (with no timing added) along with my current RV275s and see if I can keep my clutch from getting trashed and eliminate this running like crap in the winter.

Recent update on the performance issue. It is very evident that the colder it gets, been in the teens most of the day, the worse the problem is. It's an issue getting fuel to ignite I'm getting more sure of it: i stuffed a pc of cardboard between the radiator and the intercooler to try as a winter front temporarily to see if that might bring up intake air temp to a good operation range to ignite fuel. I'll see if the increase temps under the hood is enough to correct the timing issue back enough for it to run like it does in the summer which like a scalded dog. No problems at all in summer. Make me wish summer was here today cause it's chilly Willy tonite! 8 right now!!!!

You guys are awesome. Thanks for all the feedback! Enjoy this forum emensely and I've learned a lot already! First thing I did was slow run a small screwdriver down that hole to see if it went thru and yes it does. It was a location where and injector clamp was located.

I keep running into more and more discoveries. Apparantly the PO burned up a VP-44 at 36k (from what he told me when I purchased truck at 83k mi. He sprang for a reman'd pump and I did a search on the Bosch reman'd pump he installed and it's for a SO truck not HO! Apparently that's ok but putting an HO pump on SO cummins is a no-no correct?

OMG!!!!! I checked over my intake manifold bolts and I'm missing one!!! AHHHHH! Who knows how long that bolt has been out but I would imagine that would hurt my performance for sure!!!!! I sure hope I didn't mess up anything major guess I would have more problems if that was the case. I was still making 30psi boost even with that bolt out. I'll bet you installing this bolt and torquing the leaky fuel lines will solve my "man made" problems... sheesh. smh. I'm down for a few days. Have the hood off for primer and while it's off, I'm gonna fix a leaky vacuum pump seal then double and triple check all my bolts! man...how stupid...

Well I'm not sure if this cold weather issue is causing this or not but I found a fuel leak on the injector line that was hardest to reach to tighten when I put injectors in back in October. Regardless, I'm not sure how I'm gonna tighten it. Can't really reach it with my tools but I gotta get it tightened up for sure. Maybe it fuels ok with leak but when timing advances in cold weather maybe it can't keep up? Just thinking out loud here. lol

I tried ((A*2)/7)-11 and my boost is at about half what it should be. Roughly.

Question on using the formula's on the wiki page. Do I use the min and max values they have listed for the SAE PID's? I created a MAP gauge using the latest equation provided. I created an APPS gauge (11) based off of the info on wiki and I did a Timing Advance (before TDC) using the equations on wiki for PID's. Not sure if the timing advance one will work but I just thought I'd try it. I'm new to all this and VERY excited to set up a custom dashboard. Gonna try it with the wife get's back with my car and my OBDlink. I left it in there before she left! haha. I'm gonna have trouble keeping up with that thing!

10-4! Thanks.

Here's my first screenshot from a few minutes after start up on iPhone version. It seems a bit different than android as I have not found a place to send commands to ecm but it is communicating. I can do custom PiD's and I'm gonna try to set up boost like you guys have done in the next couple days. Gotta go today and help my father in law purchase a Laramie. Looking in the 2013-2016 range and boy are they some nice trucks. And expensive!!!

Headed home to get my new OBD link for my iphone and REALLY cold weather so I should get some good info in the next few days out of the scantool if I can figure out how to get those PID modes sending me data! Thanks for all the help and great information here. I've certainly learned more than I ever dreamed and I'm determined to find out why and understand why my HO cummins with EZ(on level 3) and RV275's runs rough when it's cold out. Still yet it doesn't nearly run as rough as a night in jail so I'm really not too concerned except for the fact that if I'm advanced out too much on timing on level 3. Just don't wan to blow out any pistons that for sure. lot's of other things on my list for my dec. 17th-jan3rd break from work. Vacuum pump rebuild and start sanding and priming for a new paint job this spring!!! WHOO-HOOO!

Ok. I read through a lot of this post. Just confirm with me, we are only pinging the ECM and not able to get in there and modify it to the point it trashes my truck! I am a tinkerer and like to try things to figure out software but with this scanner, I certainly don't want to do any damage! I may need some help! you guys are awesome and I like that you are cracking the cummins code to figure out how to monitor things! It shouldn't be that hard plug up a device and check anything you want but not so much! I'm sure I'll get it figured out...Otherwise I'll be tugging on your coat tails guys!

It will be here on Thursday. I have also read up on some engine specs and noticed the 01-02 HO cummins has a different vp-44 than everybody else. 027 and not a 026 hot rod vp. The 01-02 HO cummins has a higher compression ratio (17:1) and a lower rate of fueling (600cc)compared to the SO. May be why HO's have more issues with aggressive timing (my set up) and whether fueling is capable of keeping up with it (hence the stumbles when cold). I am far from understanding diesel engines but learning more each day. So I wonder if due to the engine specs of the HO that it has much less leeway when timing is advanced for the fuel to keep up. Makes me wonder if all 01-02 HO cummins engines have this problem. somebody please set me straight here if I'm wrong. This is interesting none the less. I'm always one who not only wants to solve the problem but understand the reason for the problem as well.

Buying the scan tool now. I will find out what's up on both! And that scan tool will be nice for our other vehicles too! Thanks for letting me know about it. I ran a scan tool for a short while the other day and it looked like everything was working ok regarding c temp and iat but I guess their has got to be an issue with one or the other and the grill block off plates should help get temps where they are supposed to be if they are off. I will monitor a few daysafter getting scan tool and report back! Supposed be cold cold later this week. Thanks.

I agree. I did contact Edge today and they said they'd be happy to take my box and look at it but it's doubtful the box is faulty...he also mentioned that it sounded like a a fueling issue. He said ECM comps and runs way more rich in colder weather and that maybe that's what the problem is. Make me wonder if I block off the grill this winter and let the truck run a little hotter in winter if the problem would simply go away. This experiment is leading me to buy that wifi scan tool to pipe to my iPhone. Then I could check and compare temps and performance with and without blocking grill and see if I see an improvement or elimination of the stumble.

Ran it unhooked and no issue so it's definitely present with tuner and no problem without tuner. you think I should run temp data with and without tuner? What exactly could be learned if I did that? I guess I feel like when I checked the iat/coolant temp at key on and it was the same means iat is working right. I don't understand how tracking temps without tuner would make any difference but I guess I'll check it out. Would a S-03 smarty give me more control over how much timing is present? I also noticed with tuner unhooked the truck just sounded like it ran better and much less valve clatter but obviously far less power too so...I'm stumped...