Engine/Transmission (1998.5 - 2002) Engine misses under load in high gear

[mhenon]

Yes please elaborate on the bad wire and speed sensor as I have not even considered that to be the source of my problem, but my truck has the same codes in the computer now. P1693 and P0500... .

Didn't know you had codes!!! Your first post said: " but I checked it for codes and it didnt have any codes stored in the computer".

The 0500 is a speed sensor problem. Might be a loose wire as posted above or a bad sensor. I think you just found your problem. Keep us informed.

Mike

 

[Gary - K7GLD]

Didn't know you had codes!!! Your first post said: " but I checked it for codes and it didnt have any codes stored in the computer".

The 0500 is a speed sensor problem. Might be a loose wire as posted above or a bad sensor. I think you just found your problem. Keep us informed.

Mike

With no disrespect intended towards the original poster, this is EXACTLY why I'm hesitant to get very deeply involved in cross-country trouble-shooting - seems like you too often get only partial supporting data - and regardless of how much you want to help, you sometimes get inaccurate info that leads you off down the wrong path, with resulting pointless "solutions"...

 

[JSamples]

Well considering that my truck didn't have any codes originally, it wouldve been hard to say that it did in my first post. If you don't want to get involved with helping someone find a solution to a problem, don't. The information given was all I could give at the time, no codes to be seen. The codes showed up later with a scan tool put on the truck when I was testing my sensors to see if they were in range, so my original post was correct information at the time. It confuses me as to why someone would post such a useless reply talking about why they don't like to get involved in a topic, kinds hypocrititcal it seems to me lol. But nevertheless, I replaced that speed sensor and checked the wires going into it with no results. I still have the p0500 code. What else could cause that code? Could it be my bigger tires? As far as the missing problem, its still there, but I have another interesting fact about it. I just installed methanol injection on my truck and the miss is not there under high load at all with it turned on. Pretty confusing to me. I blew my headgasket while playing with it after the water methanol install tho lmao. So itll be a couple more days b4 I have more testing to write about. All I can say is that its true that the headgasket will blow at anything over 40 pounds of boost lol!

 

[RJWEST]

Jsamples : DUH, !!!!! I also refrain from trying to help due to
to many variables, not always apparent it original post. .

 

[Underwood Tire]

sorry it has taken so long to get back to you all, disreguard my 1st post

the speed sensor did not take care of the issue, what seemed better was not the fix. here is the fix to our issue. . fass 95 75hp injs. juice with attu. on a 01 6spd the fuel in the tank ( around the sending unit) was gummed up with trash around the screen,,, this caused the engion to miss due to not enough fuel entering the fass, even though the psi on the juice was 10psi. we cleaned the tank an put in a draw straw. she runs like a new one now. hope this helps

joe

 

[C4gan]

Joe,
Thanks for posting your resolution. I will be pulling out the tank tomorrow...

JSamples,
Looks like we have some real direction now and it has Nothing to due with the speed sensor code that we have.

Let me know if it cures your issue.
Chris

 

[Huff N Puff]

A volume check

Joe,

Thanks for posting your resolution. I will be pulling out the tank tomorrow...



JSamples,

Looks like we have some real direction now and it has Nothing to due with the speed sensor code that we have.



Let me know if it cures your issue.

Chris

Would tell you if you need to pull the tank.

 

[NHonch]

Same thing

Just became a member and read Jsamples troubles and the same thing is happening to me as well

My truck is 02 Q/C 4BY4,with FASS fuel system,BD twins,120hp ADS injectors and head studs,with edge attitude.

The damn thing feels like it is starving for something,I never checked the codes,but that will be one thing to look at,and that fella that mentioned the gummy crap around the screen in the fuel tank is another good idea.



The fuel pressure gauge does not fall below 18psi,so I have a good idea it is not the fass system.

When you get an answer,please let me know as well,thank-you

 

[ddunk]

Tsb

Found this in the TSB section on this website for a 2000 model year. Just a thought... ... ... ... 18-24-99 All 5. 9L - 24V diesel engine intermittent engine stumble.

This information applies to vehicles equipped with a 5. 9L - 24V diesel engine built before engine serial number 56624822 with a date of manufacture of August 28, 1999. This information is available on the engine data plate, which is located on the left side of the engine, affixed to the gear housing. The customer may experience a quick, momentary stumble while driving or when stopped with t he engine running. This condition is intermittent and may occur at any time during the operation of the vehicle. A change to the Cummins CM551 Engine Control Module (ECM) software corrects this condition (calibration change 99CalT9A).

 

[DSeamans]

Tank screen?

Did you guys figure this out? Mine has done it slightly for a while and recently has become pretty bad. Mine sat for 3+ months while I repaired all the rust and repainted the body. I have a few tanks run through it since then, but sitting that long might have helped the goop solidify some? Before I pull the box again I wondered what you found.

 

[KLauber]

I dont know if you got the problem fixed or not, but I had the same problem too. The APPS problem probably does not cause the truck to skip, idk what may be the case with the manual trucks(that was the cause of the problem with automatic transmission's tc locking and unlocking in overdrive, anyways unrelated). What turned out to be making the engine skip was a loose return line from the fuel filter to the injection pump, causing air to get in and cause the engine to skip. So if you havent fixed yet try checking all your lines and fittings for leaks.

will

 

[JSamples]

Well I still haven't quite figured it out. I tried a new apps with no results, and have had the head off twice this month cause I blew the head gasket. While tore down I had the injectors tested and were told they were fine. I replaced the alternator and all the rubber fuel lines I could find too. My next goal is to put a completely new set of injectors in, because all the cummins gurus I know have told me my tips and aging injectors are probably my problem. It makes sense because it seems like if I really run the truck hard now and "clean it out" with the help of my newly installed water/meth injection, it runs fine for awhile. Sometime in the next month I'm gettin the injectors, I'll chime in with my results when I do.

 

[KLauber]

Now that I think about it havin that hot rod vp44 and stock injectors w/ upgraded tips (how much did those tips cost?) could cause them to malfunction I guess. If new injectors doesnt work, i'd have a specialist check out the lines and see if he can find any leaks. How do you like your stacks, I love mine, sound real trucky:-laf, have the mounting brackets that mount on to the bed rail of the truck bed been giving you any problems like... not being nearly strong enough to support the exhaust stacks!#@$%!



Will

 

[Yosemite Sam]

check or replace the boots on your intercooler to

 

[DSeamans]

More problems

My issues are worse than I thought. I had to go from Wi to Ohio and by the time I got there I was shaking, vibrating, growling and all sorts of crap. I wasn't sure I'd make it home last night. The midshaft bearing went, pounded the xfer case output bearing and who knows what else. I haven't been able to look at it yet. last summer I had the driveshaft rebuilt: straightened, balanced, new joints and midshafr bearing. I don't know if I threw a weight or what started it. After a cold start, 20 miles and the output bearing was so hot it singed my hand. I probably won't get to work on it til tomorrow night or Tuesday. I know I'm getting dang tired of something going wrong with this pos every time I drive it!#@$%!

 

[JSamples]

Well, it appears my problem is mostly a cold weather issue, I've noticed on warm days it doesnt do it. But also it seems my water/methanol injection keeps my injectors cleaner and seems to even smooth out the idle where as it used to be rough at times. Also an interesting note, I just installed high flow connector tubes and they seem to smooth the motor out a lot under load on the interstate, where I was having most of my problems. The idle is slightly lopy at times with them but I like the sound. I think the higher flow tubes match the hrvp well, and plan on getting the lines too. Anyway though, my problem is gone for now and im satisfied with the cold weather theory because one day it missed in the morning at 45 degree temps but in the evening ran great at 60 degrees. As to WHY it does this, I'm not sure. Any theories would be good to hear though.

 

[timbo]

You can read the entire thread but this should solve your issue. 1k resistor in the IAT circuit.

https://www.turbodieselregister.com.../174551-miss-only-edge-fixed.html#post1673027

 

[C4gan]

So here are my findings,
Checked my fuel after the the pump and it was full of air... (Thanks Huff n puff) So I installed the drawstraw along with the new float arm due to the float decomposing an leaving all kinds of crap in the tank. I thought for sure that this was the problem but problem still was there. Changed all filters again. . Uninstalled the edge box and the problem was still there. Uninstalled the Smarty box and put it back to stock and now the truck barely ran. . Felt like it was running on 100hp's. Keep in mind that I have been checking for codes at least twice a day and I was only getting the 0602, 0500 and the 1693. Once I brought it back to stock, 0602 went away because of the smarty and the others went away as well. The 0500 has been around for 4 years and could never get rid of it and now its gone, However, now I pulled 0237 Map to low. I cleaned this a couple weeks back an it was hardly dirty so I had no reason to believe this was the issue until Timbo brought up the 1k resistor idea. So long story short... Put a new map sensor in and it runs like a champ... . We'll see how long it lasts but for now... the map sensor was the cure... . For now!
Hope this helps and from the dealership the map sensor was almost $200. 00 and the Cummins garage was under $50... just throwing that out there.

 

[C4gan]

Just an update... ... Truck ran fine for 42 miles and now its back to the same crap. Installed the 1k ohm resister and still nothing. I'll keep plugin away. .

 

[ROADWARRIOR]

Did you uys ever get your problems figured out?



Dan