How does a Lope just start?

[DetailsUnlimited]

Not sure if its from when the HG's were done, but I have a lope and it even happens with the stock tune? What is about to go out or anything I should look at? Logged fuel rail,desired,amps to reg and some other things and I didnt notice anything out on the ordinary? I just recently deleted the fuel filter. But it was fine before then also. Thoughts please

 

[sweetdiesel]

Regulator is going bad

 

[DetailsUnlimited]

can you log anything?

 

[DetailsUnlimited]

can I log anything to know for sure? Next step, new reg or new cp3?

 

[sweetdiesel]

I like to log reg current in milliamps DES vs Act

Rail press will do the same

Then I would adjust it to make it close

If that didn't work and I was concerned enough about it I would prob just swAp reg out



You could try just adding some 2 stroke oil or a fuel conditioner

 

[DetailsUnlimited]

So I did all the above and I can post the log if need be. Still has a lope and rattle at 1/4 throttle. Would deleting my fuel filter have anything to do with it? Or the HG's just being done?

 

[RKTMech]

Odds are its a Regulator, if all other sensors are fine. Tech 2 can graph the regulator and help diag a surge condition, the knock is not a usual suspect with a failing reg in my experience though.

 

[DetailsUnlimited]

I have a fuel rail gauge in cab. The pressure stays consisant and no sudden jumps. Turn on A/C no jump. Turn wheel left and right nothing. What is the voltage to the reg supposed to be?
Ive always had the LBZ rattle, its just louder and that I tow everyday its really bugging me. Even when the exhaust brake kicks in slowing down its there.

 

[sweetdiesel]

DES vs Act should be the same

 

[DetailsUnlimited]

I logged while I was driving. Should I have while it was parked?

 

[sweetdiesel]

Both

 

[DetailsUnlimited]

They are very close. At 38 mph desired is 10681, Act is 10696.55

 

[DetailsUnlimited]

And if im reading right the amps are 16.3 on the reg current. commanded
desired it changes 1.088 to max 15 for a sec.

 

[JoshH]

I don't think the LBZ regulator PIDs are working.

 

[RKTMech]

Check the surge at idle, looking for less than 2 mpa difference in fuel pressure des vs act or less than 50 rpm diff up or down. Did you put all the injectors back in the holes they came from? for flow rate programming. Dont know if this still affects your set-up though.

 

[DetailsUnlimited]

I don't think the LBZ regulator PIDs are working.

I'll log again in the morning

Check the surge at idle, looking for less than 2 mpa difference in fuel pressure des vs act or less than 50 rpm diff up or down. Did you put all the injectors back in the holes they came from? for flow rate programming. Dont know if this still affects your set-up though.

Never took the injectors out? Been using the search button and found one guy prob was the reg. How when after start motor ran good for 20 sec then started to lope.

Who sells a modded or new lbz reg.

 

[DetailsUnlimited]

Can I install a arson kit with the cp3 still in the truck and if so what all needs to be removed?

 

[SteveFord]

Since I did away with my stock filter setup my lope is more noticeable. Mine is caused by the good ole fass pump.

 

[DetailsUnlimited]

Well I have the airdog 150 and I took the factory 8psi spring out and put in a 10 or 12 psi spring can't remember. That would make sence.

 

[sweetdiesel]

Your probably just pushing the regulator open with the lift pump then


Up the numbers in the first couple cells of the reg current table

I didn't realize u had a lift pump