68 cranking problems
Thread Starter
Racer
Joined: Jul 2016
Posts: 287
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68 cranking problems
dang...was trying to crank new 454 tripower engine...had fire to both sides of coil and to distributor cap..not to plugs..had installed pertronix 3...and flamethrower coil..never hit a lick..now i've lost fire to everything..hmmm..turn switch on,no fire to coil or dash..nothing...guess i' start over..get fire back and install points and condensor...anyone with this experience..Thanks ..Malcolm...P.S...fuse panel not hot either
Is my vette stock?? HAHA
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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Is your motor grounded? You say you had power to the coil and the distributor and not to the plugs? No power now means you fried a wire. Check for power at the starter, then at the horn relay You most likely burned up one of the fusible links between the two.
I bet you didnt have the wires connected correctly so that you had voltage during cranking at the coil or that you used the old wires and there wasnt enough voltage at the coils if youre using some sort of HEI set up. You need to get a helper so you can check voltage while the motor is cranking once you fix the power issue, or a remote starter trigger. Also check the ground from the battery to the frame. Thats been a problem in a lot of threads lately.
I bet you didnt have the wires connected correctly so that you had voltage during cranking at the coil or that you used the old wires and there wasnt enough voltage at the coils if youre using some sort of HEI set up. You need to get a helper so you can check voltage while the motor is cranking once you fix the power issue, or a remote starter trigger. Also check the ground from the battery to the frame. Thats been a problem in a lot of threads lately.
Le Mans Master
Joined: Aug 2005
Posts: 6,539
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From: Temple Terrace Florida
If you are using the stock resister wire from the 68 harness, you are not getting 12 volts to the Petronix. You need 12 volts at all times for the ignition to function correctly. Jerry
Thread Starter
Racer
Joined: Jul 2016
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ok guys...found out by tinkering with the driver dash that my power would come on and off by moving the dash in and out...Jeez...all new wiring harness throughout the car..also noticed that my shifter was shocking my face when i was tinkering with dash....is that a hot wire touching metal or a bad ground?
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
that is a little circuit board that had a small electro magnet on it. When you push the button the magnet holds the switch open so the light goes out. When you turn off the car the magnet release the switch so the next time you turn it on the magnet is ready to hold the switch open when you depress it again. THey make an afternarket circuit board that just replaces the old one, but you have to take the dash apart to get to it. You can find it at Willcox or your favorite parts supplier
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Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,348
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Sounds like you have quite a few grounding issues. The console is supposed to have a ground, your gauge console, both sides of the dash and the metal frame under the steering wheel are all supposed to be grounded.. you may want to take out your seats and spend some time on your back under the dash checking all your connections
Race Director
Joined: Mar 2016
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From: Napa Valley California
You said you have a new wiring harness throughout the car.
Who manufactured the new harness?
I would start by disconnecting the battery, call the company who manufactured the new harness and start asking them questions.
Double check all the connections are correct per the manufactures schematic and instructions.
If it is flaw in the new harness, you could have a warranty claim if you don't start cutting things up first.
I would check continuity on everything before applying power again.
Who manufactured the new harness?
I would start by disconnecting the battery, call the company who manufactured the new harness and start asking them questions.
Double check all the connections are correct per the manufactures schematic and instructions.
If it is flaw in the new harness, you could have a warranty claim if you don't start cutting things up first.
I would check continuity on everything before applying power again.
Last edited by OldCarBum; Jul 8, 2021 at 01:36 PM.
Race Director
Joined: Mar 2016
Posts: 14,401
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From: Napa Valley California
Race Director
Joined: Mar 2016
Posts: 14,401
Likes: 8,204
From: Napa Valley California
Thread Starter
Racer
Joined: Jul 2016
Posts: 287
Likes: 15
ok guys...switch was bad on wiper door...ground was bad on blower motor and wiper motor..going through all wiring and parts checking for bad grounds and adding a few extra..even with new wiring you can still have ground issues...will update when I figure out how to get it running
Thread Starter
Racer
Joined: Jul 2016
Posts: 287
Likes: 15
ok guys...had ground issues...blower works..wiper works..the wiper door switch was bad..put ground to wiper switch housing also..the override switch..was not grounded properly...got a feeling I need to work on ground strap from block to frame..then will try to crank...thanks for your input..it was well worth it