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05-16-2013, 11:46 PM | #1 |
Registered User
Join Date: Sep 2011
Location: Wildrose, North Dakota
Posts: 300
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250 Has spark and fuel but won't fire. points ignition
Ok here's the backstory. Rebuilt it last spring with an HEI. Started and ran fine but I couldn't get rid of the detonation in 4th gear. Had 444 and 60 weights if I remember right. Anyway drove the truck up to the shop and put the points ignition back in to see if that fixed the problem. Set the HEI rotor pointing at #1 spark plug. Installed points in the same position and reinstalled all points related components.
Now it won't fire. It was just running so I know I have fuel and a spark tester says I have spark. I messed around with my timing and it is correct as is the firing order. I'm looking for some suggestions. It just occurred to me that maybe I could have a connection problem in the wire from the condenser to solenoid. Would that cause it to spark but not hot enough to fire?
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Dane 67 Chevy Fleet 250/4 speed 1/2 ton 68 Chevy 250/4 speed 1/2 ton for parts 49 GMC Grain truck 235 1 1/2 ton 76 Chevy 350/4 speed 1/2 ton |
05-16-2013, 11:53 PM | #2 |
Registered User
Join Date: Sep 2011
Location: San Jose, California
Posts: 784
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Re: 250 Has spark and fuel but won't fire. points ignition
If it sparks at all, it will fire - or backfire. I'd double-triple check the plug wires again and make sure the rotor is on #1 with #1 cylinder on the compression stroke.
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05-17-2013, 01:22 PM | #3 |
Registered User
Join Date: Sep 2011
Location: Wildrose, North Dakota
Posts: 300
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Re: 250 Has spark and fuel but won't fire. points ignition
Well I rechecked everything and still not a peep out of the engine.
Started thinking of when I first timed it with the hei I had to rotate all the spark plug wires. Rotated them one spot counter clockwise now and it fired right up. Prior to this the rotor was pointed right at #1 spark plug and at #1 wire. Anyway detonation has stopped. My HEI weights were 60 and 469.
__________________
Dane 67 Chevy Fleet 250/4 speed 1/2 ton 68 Chevy 250/4 speed 1/2 ton for parts 49 GMC Grain truck 235 1 1/2 ton 76 Chevy 350/4 speed 1/2 ton |
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