ok i just finished my header install on my 02 ls1 and when i fired it up it felt nice but there was a leak from the air thing on the pass side header(i didnt tighten it up because of hte header being stripped where the bolt goes through.but when i floored it down the street it sounded nice then once i turned the corner and came to an idle it felt like it wanted to die and when i stepped on it again it didnt want to go it just felt all sluggish and didnt want to go no where???,also the ses was blinking but when i put a obd2 reader on nothing came up??? please help im trying to take a 4 hour trip on thurs

 

IIRC blinking SES light means a misfire.

 

really hows that

 

You may wanna checkout: https://ls1tech.com/forums/showthrea...t=blinking+ses

Im pretty sure in the owners manual it even states that a blinking ses light means the PCM has detected a misfire.