ECU Firmware Upgrade

[sacred cow Member Find all posts View Profile Close sacred cow]

My January 2007 vehicle with the D4D engine has not ever had an ECU firmware upgrade. Can someone please tell me what the firmware upgrade actually does so that I can make an informed decision on whether to get it installed? Does it have any bearing on the range of injector compensation codes that the ECU can handle?

Thanks
Glenn

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

Changes the fueling at low RPM's when the motor is cold, Toyota say it doesn't affect
power but mine felt flat after the upgrade.

I wouldn't do it unless you have the cold death rattle.

Cheers
leigh

[gspy4u Senior Member Find all posts View Profile Close gspy4u]

Agree, don't get it unless it's really needed. My 07 has never had it and i have the new injectors in mine now and all if fine. Takes the compensation codes without any hassles.

[ROB83R Junior Member Find all posts View Profile Close ROB83R]

I had it done...



Waste of time tbh. Didn't fix the death rattle and never notice any other difference.