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post #1 of (permalink) Old 10-13-2000, 03:36 PM Thread Starter
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304 won\'t start

Alas everything is put together and will crank over but won't start (no spark, fuel is getting to the carb). I have replaced nearly everything under the hood in my 72 Jeep Commando as well as having it professionally rebuilt during this whole process. I believe everything is hooked up correctly and will soon take it to somebody that actually knows what he is doing. But...I am still trying to fix it myself.

I think I must have screwed up the firing order or could have installed the Dist. wrong but have checked and doubled checked and so on and so on.
I used TR instructions to do it (correctly? I don't know).

I replaced the coil with an MSD blaster. I installed the ceramic resistor which came with the coil. I also replaced the original resistor on the fire wall. Right or wrong? Should I just use one of them?

I know that the solenoid is getting power. The "I" post has power and the "S" post does not (with ignition on. The coil also has power. I also tried to start it with the old coil in place (hooked up as original).


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post #2 of (permalink) Old 10-13-2000, 04:21 PM
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Re: 304 won\'t start

You didn't mention ignition timing. Is it correct?

'72 Commando, '57 CJ-5.
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post #3 of (permalink) Old 10-13-2000, 08:24 PM
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Re: 304 won\'t start

Did you set the timing on the compression stroke?


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post #4 of (permalink) Old 10-14-2000, 02:02 AM
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Re: 304 won\'t start

I dont think you want two resistors inline. Its probably cutting down the voltage too much.

69 Jeepster
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00 Expedition 4wd
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post #5 of (permalink) Old 10-14-2000, 06:50 AM
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Re: 304 won\'t start

Back to basics. First you need a spark, then you need to get it to happen at the right time.

You might want to go back to the original coil and wiring.
Key on, engine off. At the + terminal of the coil you should measure either about 12 volts if the points are open, or about 6-8 volts if the points are closed. Then bump the engine over a tad, it should revert to the other. If it doesn't check the points to see why they are not opening and closing - check the gap and make sure the condenser is tight.
If the voltage at the + side of the coil varies like it should, you should have spark at the coil tower. Make sure the spark jumps out of the wire at the distributor end - crank it while holding the wire 1/4 inch from ground.
Now see if it comes back out of the cap to the #1 wire. Then check it at the plug end of the wire.

Bump it till the damper is pointing to 10 degrees.
Pull the cap to make sure the rotor is pointing at the #1 terminal. It has to either point directly at it or 180 opposite - if not, rewire the firing order.
Now it should start (you said you have fuel) or backfire like crazy.
If it backfires, rotate all rthe wires around the cap 180 degrees.

One step at a time with the basics.

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post #6 of (permalink) Old 10-15-2000, 02:58 PM Thread Starter
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Re: 304 won\'t start

Thanks for the input. I will keep you posted.

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