LLY: WD Modded LBZ Reg tuning

[Cougar281]

Does anyone have a WD Modded LBZ Regulator in their LLY that can help me get my truck running right again? Beach_33 and LarryJewell tried to help me (Thanks for trying guys :hug:, I appreciate it), and nothing they sent or suggested helped. I've attached two logs, one of bone stock tuning and one of tuning with Beach_33's B1010. About the only thing that changes when B1010 is changed, weather it's a table from Larry, Mike, or my own messing around, is the time from peak to peak and how high the pressure goes. Pretty much all logs where B1010 has been changed have the same look. I really wanted to figure it out myself (I want to learn how to tune my truck myself, but have no clue where to start), but at this point, since nothing suggested has worked, I'm at the point that if I have to pay to get it fixed (Tny? Pat?), I'll do so, I just want to get my truck running right again. To be honest, I'm wondering if there may be something wrong with the regulator. I did get it to where it was idling smooth, with rail pressure about 1,000# high, but steady, same with the regulator mA, but when I tried to tweak it, it went totally out of whack, and when I flashed the table that "worked" back in, I got totally different results (Twice, actually :banghead.

Thanks guys,
Dave

 

[othrgrl]

Haven't done a modded Reg but when I put a whole LBZ pump in my truck I had to change these things:

B1001: 0-15mm3 and 0-800 RPM are set to 30MPa
B1010: top 3 numbers are 1600, 1510, and 1450

 

[McRat]

Yeah, that's pretty much the same advice I gave him over the phone.

I need to build him a tune this week, but I haven't had time yet.

My computer is FUBAR and it's incredibly hard to do anything with it, and I haven't bought a new one yet.

 

[Cougar281]

Yeah, that's pretty much the same advice I gave him over the phone.

I need to build him a tune this week, but I haven't had time yet.

My computer is FUBAR and it's incredibly hard to do anything with it, and I haven't bought a new one yet.

Dustin, I tried your suggested values, and it feels like an improvement, but the log doesn't look like much changed. I've attached the log.

Pat, I mean no offense, but you didin't give me any suggestions on what to try to fix it; I would have tried it and reported back if you had. You where the first person I looked to because a) I got the regulator from you guys, and b) I suspect (but could be wrong) that either you have run WD Regs in one or more of your trucks or are running them now.

In what way is your computer FUBARd? Spyware, Malware or some other crapware, or is it just an old, slow, antiquated piece of equipment?

 

[McRat]

Dustin, I tried your suggested values, and it feels like an improvement, but the log doesn't look like much changed. I've attached the log.

Pat, I mean no offense, but you didin't give me any suggestions on what to try to fix it; I would have tried it and reported back if you had. You where the first person I looked to because a) I got the regulator from you guys, and b) I suspect (but could be wrong) that either you have run WD Regs in one or more of your trucks or are running them now.

In what way is your computer FUBARd? Spyware, Malware or some other crapware, or is it just an old, slow, antiquated piece of equipment?

Microsoft decided my "work" computer was working too well, so they decided to corrupt the O/S, and cripple it. Excel, networking, printing, emailing, are all non-functional. For an added bonus, they wiped out 1/2 my saved emails. There is nothing wrong with the computer other than the operating system corrupted itself, and reinstalling won't fix it.

I guess I was talking to someone else on the phone, so I repeat it:

There are two ways to fix surging at idle when it's caused by high rail pressure. High rail pressure can come from either big lift pumps, or ported regulators. All "performance" CP3's have ported regs on them, and it's the regulator mod that causes it.

Method 1) Go to the main pressure table and reduce pressures 10-15 mPa for all columns under 1400 rpm. This is how I did most the trucks.

Method 2) Go to the regulator current table and raise the top value to 1800 then feather in the value for next 5 rows. I usually only do this method if Method 1 doesn't work.

I'll drive home and get my notebook computer, then try to get into the email system. I'll have it done by the end of the day if nothing seizes up.

 

[Cougar281]

Microsoft decided my "work" computer was working too well, so they decided to corrupt the O/S, and cripple it. Excel, networking, printing, emailing, are all non-functional. For an added bonus, they wiped out 1/2 my saved emails. There is nothing wrong with the computer other than the operating system corrupted itself, and reinstalling won't fix it.

I guess I was talking to someone else on the phone, so I repeat it:

There are two ways to fix surging at idle when it's caused by high rail pressure. High rail pressure can come from either big lift pumps, or ported regulators. All "performance" CP3's have ported regs on them, and it's the regulator mod that causes it.

Method 1) Go to the main pressure table and reduce pressures 10-15 mPa for all columns under 1400 rpm. This is how I did most the trucks.

Method 2) Go to the regulator current table and raise the top value to 1800 then feather in the value for next 5 rows. I usually only do this method if Method 1 doesn't work.

I'll drive home and get my notebook computer, then try to get into the email system. I'll have it done by the end of the day if nothing seizes up.

Thanks Pat, I'll give those a shot.

If Re-Installing Windowz didn't fix it, you may have a hardware problem or some other nastyware causing it; I can't say I've ever seen a case where a re-install or repair instal didn't fix even serious issues unless there was something else interfering. Have you tried running MalwareBytes on it to make sure there's no nastyware?

 

[McRat]

I looked through your log file and at looks like the regulator is following the commanded OK. How's your lift pump and fuel filter?

I can build you a file, but I'm not sure it will change anything.

 

[Cougar281]

I don't have a guage to check my pump, but last time I did check it, it was pushing a touch over 10psi. Fuel filter was changed two weekends ago and has less than 500 miles on it. Actually, it did the same exact thing before I changed the fuel filter (old one had 10k-15k on it), and I've tried unplugging the pumps, which made no change to the idle or fuel pressure. Is it possible there's something wrong with the regulator? Is there a good way to test it without removing it from the truck?

 

[GMC_2002_Dmax]

I don't have a guage to check my pump, but last time I did check it, it was pushing a touch over 10psi. Fuel filter was changed two weekends ago and has less than 500 miles on it. Actually, it did the same exact thing before I changed the fuel filter (old one had 10k-15k on it), and I've tried unplugging the pumps, which made no change to the idle or fuel pressure. Is it possible there's something wrong with the regulator? Is there a good way to test it without removing it from the truck?

Did you have any problem with a lift pump and a stock regulator ???

If yes then you have lift pump pressure pushing thru, if not then the regulator is allowing too much fuel flow.

If the regulator is modified on the smallest end or the end that is used for idling it is completely screwed, only the big end needs to be modded.



If the small end or top of the triangle is stock then it should not need much adjustment, once you open the small end up then it usuallly results in a FUBARED regulator.

 

[beach_33]

i had asked him about the lift pump. this was actually my first thought when he told me that him and larry could not get it figured out. he told me that he tried unplugging the pump while at idle and it still had the lope so i moved on. i am curious if maybe the reg is sticking on the open end and letting to much fuel in. i hope we can get this figured out for him

 

[2500HeavyDuty]

If the small end or top of the triangle is stock then it should not need much adjustment, once you open the small end up then it usuallly results in a FUBARED regulator.

aint the dmax ones rectangular?

 

[Cougar281]

Ok, update: I tried Pat's suggestion of lowering B1001 by 10Mpa from 1400 down (Maybe it should have been 1200 down, now that I re-read Pat's post) and it idles smooth; pressure is high, but it's a smooth idle. I haven't driven it yet with that table.

Tony, with the stock regulator, I think it had a VERY small lope; it didn't show up in the logs or on the tach; just something I could hear in the tone of the motor. Did it with or without the lift pumps on. Could also have been my imagination. As Mike said, unplugging the lift pumps made no change in the idle.

I have no idea how it's modded, but my ASSumption is that it's correct as it's a Wicked Diesel regulator.

 

[GMC_2002_Dmax]

aint the dmax ones rectangular?

The window in the regulator is a triangle, the modded ones usually open the big end a little so as the regulator opens up to deliver more fuel the opening is larger.

A rectangle ??? Not to my knowledge, and I cannot find a picture of a modded one, there was a DYI on a forum, but I don't remember where I read it.

 

[beach_33]

some are rectangular on the large end with a smaller slit for the top end

 

[2500HeavyDuty]

The window in the regulator is a triangle, the modded ones usually open the big end a little so as the regulator opens up to deliver more fuel the opening is larger.

A rectangle ??? Not to my knowledge, and I cannot find a picture of a modded one, there was a DYI on a forum, but I don't remember where I read it.

the dodge cp3's have the triangular ports in the regulator, i seen that thread you were talkin about its on a cummins site when i first seen it and its now on a few others. i think on db they have it showing both reguators.

but im sure they have a pic of it here if you search around using modding cp3.

 

[Cougar281]

So can the rail pressure be brought back down to desired?

One thing I don't get is why did reducing B1001 1400 and below by 10Mpa fix the idle and surging rail pressure (but actual is over desired), yet in idle mode it's actually going off B1012 (I think, Desired rail pressure fits in that table about where the ECT was)?

 

[GMC_2002_Dmax]

So can the rail pressure be brought back down to desired?

One thing I don't get is why did reducing B1001 1400 and below by 10Mpa fix the idle and surging rail pressure (but actual is over desired), yet in idle mode it's actually going off B1012 (I think, Desired rail pressure fits in that table about where the ECT was)?

Probably,

Looking in a stock LLY tune I have I assume the tune that you have is the same, I think you need to follow the all tables, B1012 idle fuel psi is looked at until one of these three things changes, TPS%, RPM or SPEED, then it looks to B1001, But B1001 is only altered at idle rpms by ECT add on table, and then ECT uses a table B1003/Multiplier table.

You could also look at B1008 or B1009 and attempt to alter the duty cycle.

I have tuned only one truck that did not idle correctly with lift pump psi, he was running two completely different regulators and pumps, it was just finding the right amperage to get it to idle and run correctly. We used DSP output to turn the pump relays on and also put a manual override switch in for racing.

the dodge cp3's have the triangular ports in the regulator, i seen that thread you were talkin about its on a cummins site when i first seen it and its now on a few others. i think on db they have it showing both reguators.

but im sure they have a pic of it here if you search around using modding cp3.

I did not find anything as far as pic's by searching here.

 

[Cougar281]

Probably,

Looking in a stock LLY tune I have I assume the tune that you have is the same, I think you need to follow the all tables, B1012 idle fuel psi is looked at until one of these three things changes, TPS%, RPM or SPEED, then it looks to B1001, But B1001 is only altered at idle rpms by ECT add on table, and then ECT uses a table B1003/Multiplier table.

That's what has me confused; At idle & in park, it should be pulling only from B1012, and the desired rail pressure seems to reflect that, so why did changing B1001 make the idle smooth out?

Rail pressure is relatively close when its hot, but when it's cold, it's through the roof, relatively speaking.

 

[2500HeavyDuty]

Probably,

Looking in a stock LLY tune I have I assume the tune that you have is the same, I think you need to follow the all tables, B1012 idle fuel psi is looked at until one of these three things changes, TPS%, RPM or SPEED, then it looks to B1001, But B1001 is only altered at idle rpms by ECT add on table, and then ECT uses a table B1003/Multiplier table.

You could also look at B1008 or B1009 and attempt to alter the duty cycle.

I have tuned only one truck that did not idle correctly with lift pump psi, he was running two completely different regulators and pumps, it was just finding the right amperage to get it to idle and run correctly. We used DSP output to turn the pump relays on and also put a manual override switch in for racing.




I did not find anything as far as pic's by searching here.

found it a thread that talks about modding the fca. from what im gathering the metering valve on the fca changed in 06 and up to triangular ports. i pulled apart my lbz fca erlier today and it had triangular ports on it. but the lb7 regs have rectangular ones

http://www.duramaxdiesels.com/forum/showthread.php?t=11016

 

[Texasmax]

Maybe it is the PPE race valve. I've read that these have caused issues in the past. Maybe put a stock one in and shim it. It may be worth a try.

Dix