spark not on compression stroke

2003 TOYOTA RAV4
215,000 MILES
Avatar
RSDIN559
  • MEMBER
  • 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 11:46 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
CADIEMAN
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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 18, 2012 at 1:05 AM
Advertisement
Avatar
KHLOW2008
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 41,814 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 8:57 AM
Avatar
KHLOW2008
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 41,814 POSTS
Most probably this is where you went wrong.
Image (Click to enlarge)
Attached Media
Sep 18, 2012 at 9:00 AM