SPARK NOT ON COMPRESSION STROKE

rsdin559
2003 Toyota Rav4
215,000 miles

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.

3 Replies

cadieman
Member

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?

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Tuesday, September 18th, 2012 AT 1:05 AM

KHLow2008
Expert
41,994 posts

If the ignition timing is 180 off, the timing chain installation should be correct. Either the crank position or camshaft position sensor plate is installed reversedly.

Most probably this is where you went wrong.

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Tuesday, September 18th, 2012 AT 9:00 AM

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