Yesterday, 09:54 AM | #1 |
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Join Date: May 2022
Location: Longwood 59 chevy
Posts: 269
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No spark
Motor turns over but no spark at the plugs. HEI dist with built in coil. Before I put gas into it I ran the starter to get oil up into the motor. The cotter pin that holds the foot start linkage hit the positive lug of the starter and it was smoking. Would this have caused a coil to blow? Starter circuit is all good. Ignition circuit is good. I'm going to check for power on the pink wire tomorrow and if I need pull the coils and check it
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Yesterday, 10:45 AM | #2 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,088
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Re: No spark
first check all fuses and fusible links if you have them
next check for power at the large pink power wire at the HEI connection if good, pull the cap off the HEI coil and check connections there. make sure everything is plugged in all the way and ensure there is a ground wire for the coil there, some miss that if a new cap were installed before. next check the coil physically for overheating marks. if all good, put that cover back on and pull the dist cap. check the terminals and the rotor for wear or breakage. remove the rotor and check the wires that come from the pick up coil as they commonly break. just tug them a little and see if the wire stretches, if it does that means the wire inside the insulation is broken might as well check the advance mechanism since youre there. the mechanical advance set up gets worn or can become seized if unused for awhile next check to ensure the distributor turns when the engine is turned/cranked since it is apart and I assume if you got this far you haven't found a problem yet, maybe remove the ignition module and have it checked at your local parts store, a lot of places can do that, or simply replace the module with a new one or known good part |
Yesterday, 10:52 AM | #3 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,088
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Re: No spark
forgot, check the underside of the cap to ensure there is a carbon terminal for the coil high tension power to come through. check for carbon traces inside the cap that would indicate a crack (this wouldn't cause a no spark but may cause misfire). check the rotor to ensure the contact strip in the middle isn't worn off and also the "pointer" end is in good shape
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Yesterday, 01:01 PM | #4 |
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Join Date: May 2022
Location: Longwood 59 chevy
Posts: 269
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Re: No spark
Its a brand new distributor and it fired on the engine stand. Its either my wiring AAW or I fried something when I let the smoke out of the wires. I've retraced all the starting circuits and haven't found anything yet . I'll go down your checklist. Thanks. I have the courtesy lights and dome lights on without the key on and doors closed too but I'll figure that out after I get it started.
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Yesterday, 01:27 PM | #5 |
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,547
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Re: No spark
Make sure that the terminal on the wire has a good connection with the connector in the cap. Pink wire says that you should have the proper HEI connector on the wire but if you just have a female slide terminal that is probably where your problem is with my experiences on my 71.
I have the NAPA HEI service bulletin saved here https://photobucket.com/u/mr48chev/a...8-34b5e1631d08 That is from the 80's when the Napa Echlin rep used to come to the school I taught at and put on clinics for my advanced students. That is still the best trouble shooting guide for the non computer HEI distributors I have found. It's well worth printing out and keeping in a binder for troubleshooting. You may have blown a module rather than a coil though. Provided that the power wire is getting power to the distributor.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
Yesterday, 01:34 PM | #6 |
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Join Date: May 2022
Location: Longwood 59 chevy
Posts: 269
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Re: No spark
I'll check that too . thanks
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Today, 01:06 AM | #7 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,088
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Re: No spark
take a 10ga wire, install an inlIe fuse and a switch and run it from battery positive to the pos connection at the HEI. use proper connections etc. turn the switch to on and then crank the engine. it should spark and start if all else is good. if you wanna shut it off just flip the switch to off. then you know if it is a wiring problem. this eliminates all the other wiring on the vehicle for the ignition system. it will work 9as in have spark), you have a problem with the HEI or the distributor isn't turning.
just cuz it's new doesn't mean its awesome. (sorry, hadda say it) |
Today, 01:08 AM | #8 |
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Join Date: Nov 2010
Location: calgary alberta
Posts: 8,088
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Re: No spark
inline fuse, sorry, gotta start proof reading, lol
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Today, 08:09 AM | #9 |
Registered User
Join Date: May 2022
Location: Longwood 59 chevy
Posts: 269
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Re: No spark
Thanks I'll try that too
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