ECM Reflash-No more throttle lag

[Stoofpilot]

Last week I took my wife's 2010 4.6 in due to cold start misfiring problem. They did a reflash and I got more than I was expecting. I had noticed slight throttle lag when pressing the gas pedal but never complained about it. There has been a lot of Posting on this.

Here is what it says on the service document."connected to GDS and retrieved P0300 and P0303 fault traced to and found ECM needed upgrade per TNN 10-FL-015. Retest ok.

That's all it said. Hope this helps.

I am a happy camper. Car seems to have no lad, instant power and smoother power band.

My suggestion is to complain about cold weather start or just call and ask about this TNN reflash.

 

[Admckillip]

Last week I took my wife's 2010 4.6 in due to cold start misfiring problem. They did a reflash and I got more than I was expecting. I had noticed slight throttle lag when pressing the gas pedal but never complained about it. There has been a lot of Posting on this.

Here is what it says on the service document."connected to GDS and retrieved P0300 and P0303 fault traced to and found ECM needed upgrade per TNN 10-FL-015. Retest ok.

That's all it said. Hope this helps.

I am a happy camper. Car seems to have no lad, instant power and smoother power band.

My suggestion is to complain about cold weather start or just call and ask about this TNN reflash.

What do you mean in terms of 'smoother power band'? You feel like you have more power at lower RPMs?

 

[mcginnpm]

Sounds like you can only get this service if you've got a P0300 or P0456 code and a Check Engine light.

TSB 10-FL-015 attached for reference, and here's a snippit from it:

DESCRIPTION:

This bulletin provides information related to the ECM software update of some 2009-2010MY GENESIS SEDAN (BH) 4.6L vehicles which experience a malfunction indicator lamp illuminated with the ECM (Electronic Control Module) system-related DTC P0300 or P0456:

• P0300 Random/Multiple Cylinder Misfire Detected
• P0456: Evaporative Emission System-Leak detected (very small leak)

APPLICABLE VEHICLES: 2009-2010MY GENESIS SEDAN (BH) 4.6L

 

[Stoofpilot]

For all I know, they might have used that TSB to make a series of software changes to fix a bunch of nagging little issues. MAybe it is all in my mind yet the overall drivability seems better. It just seems to have a better low end response and smoothness. Push the gas, get immediate power the the great 4.6 keeps pulling.

My service manager told me that they do not check TSB's unless the customer complains about a problem.

I would test the system and complain about cold start and tell them what this TSB is.

 

[mcginnpm]

My service manager told me that they do not check TSB's unless the customer complains about a problem.

TNN - Tech Net Note

These typically equate to TSB numbers. When your service guy hooked up your Genny to their GDS (global diagnostic system) it probably spit out the TNN number when your car popped the P0300 code, which then told them to update your ECM.