reflashing the computer......Can someone give me a brief description of what this is, when and why do you do it please? I've noticed it on herre a few times and I'm wondering if it is something I should have done at some point and time, thought it might have something to do with the chip problem I'm having right now. Thanks guys.

 

Think of a reflash as changing some of the factory settings in the computer. Same as a chip but you don't have to worry about the chip vibrating loose or visible evidence of a chip. You still need a tuner to provide reliable program data, whether reflashing the PCM or programing a chip.

 

now that the predator is out i think its a lil old school to do this...

 

Ruination,

Actually that is exactly what the Predator does...it reflashes the PCM. You can make all the changes to the program that you want within the Predator, but until the program is 'loaded into the PCM' (which is the PCM being flashed) you haven't done anything.

 

When you install a chip(new settings for your PCM) or use a predator or have a tuner re-flash your EPROM(Extended Programable Read Only Memory) in your engine control computer you change the same stuff that you use to have to change by turning distributors, changing jets, adjusting dwell and putting different cams on the old holley.

You have to do this when you change boost, MAFS, use NOS or just want a little more timing. Since the 4R100 is electronically controlled it also adjusts shift points and firmness. It will also adjust idle just like the idle set screw on a carbuerator except the computer controls your idle air control motor. It will also adjust fuel curves for more boost or nos.

Anytime you change major variable you have to let the computer know so it can run your engine accordingly.

 

QIKSLVR

I think your problem is from to much timming and too little fuel for 14lb boost. What brand is your chip? Call me after while and well talk about it. IF the chip is programed for no boost then you might be better off without a chip at all. ps i got my idler back so you better watch out and i got me another new mod too but i can tell you what it is

 

i know that, thats why its pointless to send your PCM somewhere to get it reflashed.

 

Ruination,

A little misunderstanding...I thought that you meant PCM flashing in general was old school technology.

 

thanks guys. I've been wondering what yall were talking about, I thought maybe this was something you did to the computer after you plugged in a chip or something and that might be why my truck isnt shifting out right now with the chip. Well, anyway back to the guessing game of trying to figure out what is wrong with it. thanks again. Latemodel, I'm going to work at 8:00, I'll cal you after I get there if were not too busy.

 

I've been told that having the ECM reflashed is different then what the Predator Flash tuning does. I was told by a vendor that sells the Predator and also does Reflashes that the reflash is a more thorough program (for lack of a better term) and that a reflashed ECM will automatically make all of the adjustments to fuel / timing that a stock ECM does. This is supposed to eliminate the need to have cold/hot weather programs. I can't say I fully understand how this would be but this is what I was told. If anyone knows for sure that this is or isn't correct I'd really like some clarification. Thanks.

 

The "Blue Oval" reflash is a program that stays in CLOSED LOOP at WOT so all of the sensors are being read and compensated for rather than going to open loop at WOT and only reading fixed tables that must, out of necessity be different at different temperatures--but aren't.

 

If the 'Blue Oval' reflash does indeed stay in closed loop mode at WOT, how does it richen the air fuel mixture? I was always under the impression that during closed loop operation the PCM was always adjusting fuel, timing, etc. based on the input from all of the various and sundry sensors but that it was always looking for a 14.65/1 A/F ratio. Since the PCM traditionally relies on static fuel trim tables for WOT operation, how does 'Blue Oval' get around this to allow the PCM to richen the A/F mixture during WOT? Certainly not trying to steal any trade secrets, just curious how they've managed to do this...which is actually a pretty cool thing.

 

Struck in AZ,

I believe the simplistic answer to that question is that the BOP Reflash programs controls fuel mixture, etc exactly the same way that the OE software does, it just has broader capabilities as far as mods go. The BOP program is always striving for 14.65 except under heavy throttle conditions, at which point the target A/F ratio changes.

For a more, in depth, explanation, call Mark at 904/443-2665, I think you will be impressed with his explanation.

Mad

 

Thanks for that explaination. It stays in closed loop at WOT. That would do it. Thanks again.