I doubt your fuel pump did anything... I ran around with my regulator wide open (didn't know it at the time... I just assumed it was the fuel pump) and barely making 30PSI and everything was fine. At WOT while driving (doesn't work sitting still), you should be seeing at least 2500PSI... barely saw 900PSI when my IPR stuck.

 

At WOT while driving (doesn't work sitting still), you should be seeing at least 2500PSI... barely saw 900PSI when my IPR stuck.[/quote]

finally got to check #s still 11% 480 warm idle the most i could get at wot at speed was 38 % 2450 psi . i need to check low oil pressure forgot to look this morning . truck just seems off a littel on power until you hammer 1/2 or more throttel . and injectors seem a littel noiser .i should be seeing more pressure at wot according to what ive been reading somewhere in the 2800 3000 range . does any one know if the latest throttel pedal has any differant programing than my original. i was also wondering if you could run the bigger late model 99 injectors with my stock programing in my early 6/98 . thanks wes

 

finally got to check #s still 11% 480 warm idle the most i could get at wot at speed was 38 % 2450 psi . i need to check low oil pressure forgot to look this morning . truck just seems off a littel on power until you hammer 1/2 or more throttel . and injectors seem a littel noiser .i should be seeing more pressure at wot according to what ive been reading somewhere in the 2800 3000 range . does any one know if the latest throttel pedal has any differant programing than my original. i was also wondering if you could run the bigger late model 99 injectors with my stock programing in my early 6/98 . thanks wes[/QUOTE]

That's actually e99 tuning... with the e99 PCM in the truck, it wouldn't allow the truck to build more 2500PSI which is what you're seeing. When I went to a later PCM, I saw around 2700PSI or so. Your numbers seem normal... as to "noisy", unless the truck got up to operating temperature before you started, it'll sound louder because the PCM advances the timing when cold and doesn't shift it back until it reads somewhere between 140* and 160* of engine oil temperature. I'd say your numbers are about normal... I do know the weather seems to be contributing to it some... I think it's the fuel or something. That or it's affecting me to where I'm so "dead" that I can't feel it!

 

thanks jon , do you know if i can run the later bigger 99 injectors with my early 99 programing ?

 

I would think so... the PCM see's it as an injector... only thing that changes is the amount each injector puts out. If my later PCM can run my early injectors, I don't see why it wouldn't work the other way around. But if you're changing sticks, why not just drop a set of AC's in there and put a later PCM in the truck? You get more diagnostics power with a later PCM, the biggest being rotational velocity.

 

the ac injectors are a single shot injector according to rr injector page it said it was international trucks only as a high tourqe motor im thinken that would need programing for those. i was thinkin the ad wich are a later model split shot like my originals but with a bigger nozzle 130 to 160 if i am going to ss i would probibbly go with a stage 1 or 2 ss with a programer. but trying to save money and keep the reliability. but a littel xtra power doesnt hurt either. and i did not know if clay would except my ab cores for a set of ad's yea i noticed alot of people talking about rotational velocity i did not know what that is. thanks jon

 

Rotational Velocity... I'm pretty sure it works like this (correct me if I'm wrong, fellas):

Rotational Velocity is a live data item that is read by the cylinder. If you pull down the menu for one of the data meters, you'll have a Rotational Velocity item for each cylinder and you'll have to watch them all in separate meters. There are nine data meters and 8 cylinders... I normally like to use the 9th meter for EOT because the motor has to be up to temperature for this (150* to 160* I think). What it does is it monitors subtle changes in RPMs as each cylinder fires and then determines in a percentage how much each cylinder varies in it's contribution to the total output of the motor. They say the 5% or so is when you should start to wonder... so far, mine don't read worse than 1.5% or so. Not bad for 303K!

An AC is just a hair under a stage-2... I don't think the difference between the AB's and AD's isn't enough to really make a difference in your output. AC's would make a reliable 300HP to 350HP... what I'm gonna do is take an AC and put nozzles on it. I should end up with something pretty close to a stage-2... the reason for the AC's is because I want a new, unmodified injector. Putting nozzles on doesn't involve doing anything to or with the internals (I think)... I'll have a reliable and consistent set of injectors because they haven't been modified internally. Not that a reliable and consistent injector can be made, it's just not like a manufactures Alliant injector.

Going to SS's will require tuning, but the AC's will actually be more efficient than your AC's... at least, from what I've read. Call up Clay and talk to him about it... he'll do a MUCH better job of explaining it than I am. Plus, the fact that he is running stage-2's helps a TON!

*EDIT* Rotational Velocity can't be read on an e99 PCM... only on the later PCM's.

 

[
. Call up Clay and talk to him about it... he'll do a MUCH better job of explaining it than I am. Plus, the fact that he is running stage-2's helps a TON!

thanks jon he must have read this as he pm'ed me