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Re: Race car wiring ??
[Re: bobs69]
#1362312
12/31/12 04:22 PM
12/31/12 04:22 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: Race car wiring ??
[Re: MR_P_BODY]
#1362313
12/31/12 05:28 PM
12/31/12 05:28 PM
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Joined: Aug 2006
Posts: 813
ar.
bobs69
OP
super stock
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OP
super stock
Joined: Aug 2006
Posts: 813
ar.
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Re: Race car wiring ??
[Re: bobs69]
#1362314
12/31/12 05:36 PM
12/31/12 05:36 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Yes!!
Are you getting voltage to the box and coil
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Re: Race car wiring ??
[Re: bobs69]
#1362315
12/31/12 05:39 PM
12/31/12 05:39 PM
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Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
sr4440
super stock
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super stock
Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
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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
Without Data, you’re just another guy with an opinion.
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Re: Race car wiring ??
[Re: bobs69]
#1362317
12/31/12 07:43 PM
12/31/12 07:43 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: Race car wiring ??
[Re: MR_P_BODY]
#1362319
12/31/12 08:20 PM
12/31/12 08:20 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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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.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Race car wiring ??
[Re: D-50]
#1362320
12/31/12 11:32 PM
12/31/12 11:32 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: Race car wiring ??
[Re: bobs69]
#1362321
12/31/12 11:37 PM
12/31/12 11:37 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: Race car wiring ??
[Re: bobs69]
#1362323
01/01/13 02:43 AM
01/01/13 02:43 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Changed the cap and rotor. Runs and starts fine
Cool
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