Throttle Actuators on engine shutdown: self-check?

7419sundat · 02-19-2013, 07:20 PM

I think its opening them when you turn the car car on KOEO, and closing them when you shut the car down.. i think lol

juld0zer · 03-18-2013, 03:30 AM

hey guys are you sure it's the throttle bodies? I've been told it's the electronic EGR valve doing its self check/self freeing of its shaft on shutdown. Concept is pretty much as ByThaBay described it.

Both my previous Mazda3's did it, gf's 2012 Mazda2 also. but all 4 cars have electronic throttle bodies too... it would be unusual if the butterfly flaps moved back & forth after shut down. You'd expect them to shut instantly & remain shut as a means of preventing an engine 'running away'

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02-19-2013, 07:20 PM	#1 (permalink)
7419sundat Base Member Join Date: Aug 2011 Location: colorado Posts: 145 Drives: 09 370z Gtm TT 2 Rep Power: 16	I think its opening them when you turn the car car on KOEO, and closing them when you shut the car down.. i think lol

03-18-2013, 03:30 AM	#2 (permalink)
juld0zer Enthusiast Member Join Date: Nov 2012 Location: Sydney Posts: 428 Drives: 11 Nissan 370Z MB M6 Rep Power: 141	hey guys are you sure it's the throttle bodies? I've been told it's the electronic EGR valve doing its self check/self freeing of its shaft on shutdown. Concept is pretty much as ByThaBay described it. Both my previous Mazda3's did it, gf's 2012 Mazda2 also. but all 4 cars have electronic throttle bodies too... it would be unusual if the butterfly flaps moved back & forth after shut down. You'd expect them to shut instantly & remain shut as a means of preventing an engine 'running away'