ok well i have a ls vtec with ctr pistons and my cylinder 3 was miss firing so i just put a new injector in now its running on four but i have a weak spark the spark is orange and the car has alot of trouble starting, when iam at WOT vtec works then seems to fall out then around 6700 start again and pull strong to 8200 oil level is fine please help me out here seems like its not burning the fuel what could cause a orange spark instead of blue