I think it is , if you read all the post (don't have to ,i'll tell you what they say) there are over 50 post that say i re soldered my rcm and still have the same problem including MYSELF. so get a new one for over 100 dollars or send yours to tighed1 for a lot less he will fix it,, I say your problem is the RCM .
,email him for the cost tighed1@hotmail.com
send it to
TIGHED1
3601 Pinnacle Ct
Sierra Vista, AZ 85650