Can I swap out my e99 ecm with a late model ecm and gain anything? Would I need to re-tune?
I was told my stumble/studder issue could be my e99 ecm not keeping up.

 

You would not gain anything per say...

I prefer the PMT shift strategies over the older ones...

Its not a Performance upgrade by any means...

 

So it wouldn't change anything else,except shifting,good. I think I'm going to try different tunes anywho. Not impressed with mine. Guess I will start looking around. Thanks again Joe.

 

I stuck an NVK5 In my e99. (PMT1 shift startegies on my chip) It idles better, and shifts ALOT better. As Joe said it's not a performance upgrade, but I think it's worth doing if you can get a deal on a later PCM.

 

Not looking for performance,just trying to straighten out the truck. Heard the late model ecms held better tunes also.

 

Yes...Thats the reason Brian at BTS suggested that I change my pcm to a later year. More parameters can be changed.
I think most tuners use the PMT1 as a base for their tunes.

 

I have never heard of a PCM causing "stumble/studder", nor did I ever experience in the 7 years my E99 had an E99 PCM.

 

Well,I guess that rules that out. Probably still upgrade eventually. Thanks Robin and Franko for the info.

 

Where? I have yet to find any "more" than what a PMT1 has (as far as how the truck runs, drives, etc.)......

 

Not sure if this is what the OP is referring too but here is something to look at.

"Some vehicles may exhibit an engine buck, surge, or jerk (also known as hitching/hesitation) while the speed control is active through all engine temperatures. This may be caused by the calibration and strategy of the Powertrain Control Module (PCM)."
TSB 00-25-04 - 1994-1997 Power Stroke FAQ

 

The studder/stumble only happens at wot. If I ease into the pedal its fine.
Parts I have now ready to install are-lpop,fluidyne hb,airdog,fuel sump,swamps hf/hv idm,and a new cps. After that I'm going to research new tunes for the TS chip.

 

I meant compared to an XLE4 e99 pcm, at least thats what two different tuners told me.

 

I only ask because nearly all of the "tuners" out there use the software and definitions that my boss has put together. I get to deal with the codes in question all the time.

The "changeable parameters" you're talking about are nearly identical between XLE4 and PMT1. It seems to me that anybody that says an XLE4 is not as "tune-able" as a PMT1 is too lazy to spend the time on making tuning for an E99 truck. Sure, there are a few inherent weaknesses in the base strategy (mostly concerning torque converter clutch apply/release criteria), but an XLE4 makes power and shifts using the same list of "changeable parameters" that a PMT1 does. In addition, once a truck with either calibration is above 45 MPH and the transmission is in 4th gear and the torque converter clutch is applied, there is NO DISCERNIBLE DIFFERENCE between either one.....or ANY Super Duty automatic PCM code for that matter. Forced downshifts are different, but I'm talking steady-state cruise conditions.

Do I prefer using one over the other? Of course. The PMT1 wins hands-down for me because of how I use the truck. If I were to have a daily-driven truck that simply cruised around town and drove up and down the highway unloaded (like someone would use a truck for a commuter vehicle, right?), then the XLE4 would work excellent. However, since I tow and USE my trucks fairly consistently, the XLE4 irritates the hell out of me.

 

Good info for those years but the later year PCM CC caibration must have taken care of this problem. My CC was smooth until I started modding for more HP, then it got real touchy. During live tuning I had that adressed. The CC can still be a bit touchy under certain conditions but it is way better then before.

 

Thank you for the insight. Im no expert, I'm just going with what I have been told by different tuners. (and I may have misunderstood them )
When I asked my fist tuner (xle4 pcm at that time) if there were any updates he said not much has changed on the e99 tunes. The updates were more for the later 99.5+ trucks.
My second tuner asked if I wanted to update my xle4 to a later pcm because he could change more parameters( I'm prob not using the correct term) compared to the e99 pcm's...

It made me think the e99 pcms were worthless when it comes to tuning.