check engine light comes on then flashes and turns off. is this normal? on 2002 Honda Civic

My civic wornt start. i checked the timing 3 times. There is fuel pressure at the fuel rail. My c.o.p. are getting 12 volts.I have compression 110 psi. I just did the head gasket and now it cranks but wont start, doesnt even attempt to start. The check engine light will turn on when i put the key in and turn it to ignition. stays on for 20sec. then flashes 5 times and turns off. Once i turn the key to start the car it cranks but no start. When I turn the key back to ignition the check engine light is off and the battery light is on.

by in Chino Hills, CA on December 29, 2013
1 answer 3 comments
ANSWER by on December 29, 2013
First- recheck your timing. Second- why was headgasket replaced? Overheat, oil leak,broke timing belt & bent valves?
COMMENT by on December 30, 2013
yes I have checked it 3 times. It overheated.
COMMENT by on December 30, 2013
is the immobilizer (green key) light flashing?
COMMENT by on January 02, 2014
No it comes on when turned key to on position and goes away. it only blinks after I tun off and remove the key

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