spark not on compression stroke

2003 TOYOTA RAV4
215,000 MILES
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RSDIN559
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I rebuilt the engine. I'm trying to start it, but the spark is not on the compression stroke. It's 180 degrees off. I was very careful to make sure the chain and all marks lined up. Could this be a problem with the cam position sensor, or is it something else. Thanks in advance.
Sep 17, 2012 at 11:46 PM
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CADIEMAN
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put it on compression stroke on #1 cyl. then turn the crank until the piston gets to tdc.check the timing marks if they line up or not?
Sep 18, 2012 at 1:05 AM
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KHLOW2008
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If the ignition timing is 180º off, the timing chain installation should be correct. Either the crank position or camshaft position sensor plate is installed reversedly.
Sep 18, 2012 at 8:57 AM
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KHLOW2008
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Most probably this is where you went wrong.
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Sep 18, 2012 at 9:00 AM