Quote:
Originally Posted by mwebb
depending on the system ," misfire " detection by mr computer causes additional events to take place , not the least of which is suspended Mode 6 testing of various components - some systems will disable injectors on the misfiring cylinder , some will prevent the transaxle from shifting "normally" some will revert to open loop and retard ignition timing to limit max power output .
in other words
when your system detects misfire , everything changes , and NO this is not a desirable state or condition for your system to be in
you may have already killed your cat converter , but you will never know as your system can not test for it as testing is suspended by your tampering .
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mwebb, to tell you the truth, nothing you mentioned has happened on my
DCD test vehicle over 3 years. I try to clear the OBD-II code once a month,
every time it shows "071"="misfire", no other real trouble generated. It all
depend on how the ECU is programmed to process the troubles. Many DCD
installed vehicles in China even never report "misfire". So it all depend on the
regulation and the related ECU software ----- a man-made issue.
By the way, how do you know the cat converter have already killed??? By
un-burnt fuel??? NO! This does not belong to DCD. DCD will stop injection
for some time, how does un-brunt fuel go into cat converter??? Or killed by
cool bypass air??? YES! DCD does have lot of bypassing air, but every vehicle
has such action when driver releases gas pedal during deceleration.