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Old 09-24-2005, 01:02 AM   #1
Imprezanize
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2002 Impreza 2.5 RS
Aspen White

Default detonation sequence

what is the detonation sequence, if you are facing the car. 2.5rs my02
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Old 09-24-2005, 03:24 AM   #2
Master2192
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Front left, Rear Right
Then Front Right, Rear Left

Same on all the 4 Cyl Boxers

I think that translates to 1-3, 2-4
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Old 09-26-2005, 02:56 AM   #3
EcksJay
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correct, and FYI, detonation is a bad thing. You mean ignition.
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Old 09-26-2005, 03:35 AM   #4
specialev
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The front is the part that is towards you and from this perspective layout is :

Passenger side seat------------------------------Driver side seat
3---4
1---2


------------Front of car----------

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Old 09-26-2005, 12:18 PM   #5
Master2192
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That animation from Howstuffworks.com is alittle misleading specialev

From Cars101.com http://www.cars101.com/subaru/imprez...tml#mechanical
Firing order 1-3-2-4

And also from another site.

http://autorepair.about.com/library/...bl-fo-0492.htm

I could have sworn that it did not fire two pistons on the same side at the same time though. Seems unbalanced to me somehow.
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Old 09-26-2005, 12:59 PM   #6
Hayes
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Two pistons do not fire on the same side at the same time. Remember this is a four cycle engine so each piston only fires on each second crankshaft revolution.
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Old 09-27-2005, 02:38 AM   #7
Imprezanize
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thank you guys
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