Built KA problem. car wont start with a/c on

[240sxvaj]

my car has this problem eversince i got the motor built.

Problem: i cant start up my car with my a/c on. it would turn over and all but then wont start. i would have to turn off my a/c and then start up my car and then it would start right up. this happen on hott or cold days.

i remember when my motor use to be stock (stock internals) and when i had the a/c turn on it would start right up.

what could be wrong?

[motoman399]

the only thing i can think is check the wiring harness out of the firewall that runs over the driver fender well... my wheels scraped that once.

[xX RB Xx]

the only thing i can think is check the wiring harness out of the firewall that runs over the driver fender well... my wheels scraped that once.

yeah mine did that once... except i tore right through the harness..

but i dont think that is his problem

[motoman399]

ya i went through some wires and when i turned on my headlights the fan would come on lol. i dont see what else his problem would be. cause building the engine has nothing to do with either the a/c or the starting.

[xX RB Xx]

i went through the fuel pump, headlights, and 2 other ones i cant remember

[xX RB Xx]

the only thing i can think of is that the grounds arent tight or you battery is low and you dont have enough power to start.

[240sxvaj]

my volts for my afc neo read around 13.3 and up.

all my ground wire are pretty tight to the point where i was scared i might over torque it and break the screw.

as for my battery its been recharged from autozone and i used it for awhile now with no problem

i was suprise that it wouldnt start on me when my a/c is on.

anyone here had this problem yet? what caused it to not start?