spark not on compression stroke

2003 TOYOTA RAV4
215,000 MILES
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RSDIN559
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  • 1 POST
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 4:46 PM
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CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
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 17, 2012 at 6:05 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
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 1:57 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Most probably this is where you went wrong.
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Sep 18, 2012 at 2:00 AM
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