I know even less about the computers that control my engine than i did my car, so bear with me guys lol. Say I put in a motor with modified heads and pistons and a sportier camshaft, would I need to change the engine control module? Where is it located in the car? Can it be reprogrammed? I know when and if i turbocharge it I will need to change it, but for just the engine upgrades would it make a difference?
Our computers are sons of bitches. The only way to re-program our ECU is either sending it to Jbody Performance or soon GM will offer a reflash for boosted cars. No one actually replaces their computer cause they can't with another computer. What they do is have products that manipulate the computer like for example an SAFC-2 & Greddy E-manage can change the ful (emanage can change the timing), MSD-2 ignition can add more spark, advance timing and raise the rev limiter.
There are things you can use to change whatever you need. If your a highly modified car and have about 2 grand to spend, you can get a Stand Alone system where you can have the computer do whatever you want basically.
www.kronosperformance.com / 732-742-8837
but for like simple things like exhaust, intake etc, would any change to the cpu be necessary?
Dave Eichorn wrote:but for like simple things like exhaust, intake etc, would any change to the cpu be necessary?
i get in the habit of resetting the PCM before performaning just about any mod. i've heard it seems to respond better if you reset, then go drive the car hard for a while.
I was a retard, and now I'm permanently banned.
and to perform that reset it requires to send it to jbodyperformance?
Dave Eichorn wrote:and to perform that reset it requires to send it to jbodyperformance?
No, he's talking about reseting the computer by disconnecting the battery. When you do that it resets the computer so that it might accept the modifications faster.
www.kronosperformance.com / 732-742-8837
ahhhh
at what point would it no longer be able to accept those mods and require reprogramming by a professional.
Quote:
at what point would it no longer be able to accept those mods and require reprogramming by a professional.
At the point where it doesn't run correctly.
Usually a 10% - 15% change in volumetric efficiency doesn't cause problems. Lightening the drivetrain generally doesn't cause issues, as well as removing sprung weight. Internal engine mods often need reprogramming or some type of external "cheater" device. Turbo, supercharger, or transmission change (auto to manual or vice- versa) require reprogramming (or a "cheater"). And changing injector size by more than 10-15% often requires reprogramming or some type of external control device.
magazine bolt on parts often don't require a reprogram.
-->Slow
pretty much as said, once you get up into serious mods....then it would be needed...
but basic boltons the computer can comprehend it.
Dam-it Muffins (Event) wrote:pretty much as said, once you get up into serious mods....then it would be needed...
but basic boltons the computer can comprehend it.
without resetting the PCM seems to not comprehend, but compensate... making the mod absolutely pointless!
I was a retard, and now I'm permanently banned.
Spotabee Racing wrote:Dam-it Muffins (Event) wrote:pretty much as said, once you get up into serious mods....then it would be needed...
but basic boltons the computer can comprehend it.
without resetting the PCM seems to not comprehend, but compensate... making the mod absolutely pointless!
it'll comprehend, however it just takes a few cycles to get it down pact.... keep in mind its a computer. pretty high tech stuff. its not THAT primitive
unplugging the comp it can take anywhere between 1 and 3 cycles to learn it all back.
not unplugging it, it can take more than 3.... all depends on how and what the mod is...
