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08-17-2009, 07:18 AM #1
Reprogramming Necessary After Changes?
Still need a little help understanding the control the pcm has over changes made to improve performance.
2004HD 6.0. Simple upgrades to improve performance. I've added a K&N CAI system, true dual Flowmaster 50s, replaced plugs (AC platinum), and replaced the plug wires (Bosch).
Is it necessary for a pcm reprogram to take full advantage of the changes or does the pcm recognize the changes and make the appropriate moves on the fly?
08-17-2009, 08:40 AM #2
It is not necessary to reprogram the PCM as it is capable of adaptive learning and it will try to adapt. For instance if the idle is higher because of new air filter the PCM will lower it. The PCM can make slight changes to make the engine perform as programmed.
Now if you want more performance then you need a performance reprogram or custom tune as it's called. This is an aftermarket upgrade and not something the dealer does. Does this answer your question?Jim
2004 SILVERADO 2500HD LS
Pro Comp Leveling Kit
285-75-16 Cooper ST All Terrains
Pro Comp Programmer
Linux Bed Liner
1967 Landcruiser <350 Chevy>
1990 Geo Metro Convertible
2007 FJ Cruiser
08-17-2009, 10:01 AM #3
Couldn't have said it better. Big Thumbs up!2005 Chevy Silverado Z71 in Black
6" BDS Suspension Lift | 3" BDS Body Lift |17" Rock Crawler Stellies | 35" Cooper STTs | 4.56 Yukon Gears | AirAid CAI and TBS | Flowmaster 40s | HyperPAC Programmer
2001 TJ Sahara in Sienna
3.5" RE Suspension Lift | 33x12.50 Baja MTZs | D30/44 | ROKMEN Merc Front Bumper | Warn Rockcrawler Rear w/ Carrier | Warn M8000 Winch
08-17-2009, 10:27 AM #4
Perfectly said and understood. That's what I needed to know. Thanks
08-17-2009, 05:02 PM #5
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- Apr 2009
- Fresno California
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A custom tune from our vendors, can help you take more advantage of this.
I would recommend getting more upgrades..... maybe like some long tube headers, if you dont have to smog in your state.2004 4.8| Custom Paint| Tint| De-badged| Shaved Tailgate| Rollpan| Smoked Tails| Color Matched| Lowered 5/8| Suede Interior| Color Matched Interior| Indash & TVs| Mids-Lows & 2 12" CVRs| 500 & 1100 Interfires| Soundeadener| Outlaw CAI| Magnaflow|
Future Mods: 6.0 LQ4/9| Bags|