Quote:
Originally Posted by DGM-BRZ
I have an auto.
As Im braking, I feel a small shift forward and backwards. Any idea what that could be?
@ steve99 |
yeah you will often get a cel code after flash with auto's as the comms to the auto trans ecu get turned off during engine ecu flash, the trans ecu get lonely and spits a code. sometimes it will go away after a couple of drive cycles if not do the battery reset.
When you flash/reset ecu some learned parameters are cleared this may make the engine run a bit strange for the first couple of drive cycles.
the "knock" sound is sometimes the ecu shutting off injectors on overunn ie coasting to a stop to save fuel, you sometimes get a bit of backlash is drive train creates a few weird sounds, usually more noticable with air-conditioner load or switching (ac runs with defrost function as well)
Table below shows the rpm the institutors start fueling again on overun, when car warmed up this occurrs at about 1300-1400 rpm, if you get a rattle arround then comming to a stop that might be it