Posted By: bobs69
Race car wiring ?? - 12/31/12 08:18 PM
Just finished with the car has a msd 7al 2 box started fine yesterday now it hits only when i let off the start button. Anyone know what is wrong? Thanks 
Race car wiring ??
Posted By: MR_P_BODY
Re: Race car wiring ?? - 12/31/12 08:22 PM
Quote:
Just finished with the car has a msd 7al 2 box started fine yesterday now it hits only when i let off the start button. Anyone know what is wrong? Thanks
Did you hook up the run and crank wires together...
MSD you have to.. because you get rid of the ballast res
Posted By: bobs69
Re: Race car wiring ?? - 12/31/12 09:28 PM
Yes!!
Posted By: MR_P_BODY
Re: Race car wiring ?? - 12/31/12 09:36 PM
Quote:
Yes!!
Are you getting voltage to the box and coil
Posted By: sr4440
Re: Race car wiring ?? - 12/31/12 09:39 PM
I hate to tell you this, but I think you box is broken. I had the same thing happen. One way to tell for sure, unhook the “mag” wires, then hook up the “white” wire. Repeatedly ground the white wire, the ignition should spark every time you remove it from ground.
Joe
Joe
Posted By: bobs69
Re: Race car wiring ?? - 12/31/12 11:11 PM
We have fire at the plugs
Posted By: MR_P_BODY
Re: Race car wiring ?? - 12/31/12 11:43 PM
Quote:
We have fire at the plugs
Well its not the ignition then... do you have fuel..
pump the carb to see a pump shot
Posted By: bobs69
Re: Race car wiring ?? - 12/31/12 11:48 PM
Yes we have fuel. The spark at the plugs comes and goes. I think it is the distributor. Good fire from the coil. not a consistant fire on the plugs
Posted By: D-50
Re: Race car wiring ?? - 01/01/13 12:20 AM
Quote:Quote:
Just finished with the car has a msd 7al 2 box started fine yesterday now it hits only when i let off the start button. Anyone know what is wrong? Thanks
Did you hook up the run and crank wires together...
MSD you have to.. because you get rid of the ballast res
Mr.P, what happens if you do not get rid of the ballast resistor? I have a digital 6 and did not know you were supposed to get rid of the ballast resistor,I hope I am not hurting my MSD.
Posted By: MR_P_BODY
Re: Race car wiring ?? - 01/01/13 03:32 AM
Quote:Quote:Quote:
Just finished with the car has a msd 7al 2 box started fine yesterday now it hits only when i let off the start button. Anyone know what is wrong? Thanks
Did you hook up the run and crank wires together...
MSD you have to.. because you get rid of the ballast res
Mr.P, what happens if you do not get rid of the ballast resistor? I have a digital 6 and did not know you were supposed to get rid of the ballast resistor,I hope I am not hurting my MSD.
Its just reducing the voltage... MSD wants lots of
volts... you'll get a hotter spark with full voltage
Posted By: MR_P_BODY
Re: Race car wiring ?? - 01/01/13 03:37 AM
Quote:
Yes we have fuel. The spark at the plugs comes and goes. I think it is the distributor. Good fire from the coil. not a consistant fire on the plugs
Make sure the carbon ball is in the center of the cap
Posted By: bobs69
Re: Race car wiring ?? - 01/01/13 06:36 AM
Changed the cap and rotor. Runs and starts fine
Posted By: MR_P_BODY
Re: Race car wiring ?? - 01/01/13 06:43 AM
Quote:
Changed the cap and rotor. Runs and starts fine
Cool