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02-17-2017, 01:13 PM
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#1 |
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Registered User
Join Date: Apr 2013
Location: Houston,Tx
Posts: 790
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not cranking after tach
hey guys..having an issue.. working on 70 that had idiot lights.. I installed a factory full gauge set up repined the harness.. all that is good.. now it wont start.. getting fire at the dist.. new rotor.module...it just cranks over no spark..so I go and disconnect the tach wire from the dist.. and bam it starts right up.. help me out guys..never had this issue before..
__________________
1966 C10 "Mary" 1972 C10 Cheyenne "Betty" https://67-72chevytrucks.com/vboard/...d.php?t=847364 1979 C10 Silverado "The BIG TEN" https://67-72chevytrucks.com/vboard/...d.php?t=841339 C10 Club Texas -HMIC |
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02-17-2017, 01:18 PM
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#2 |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: not cranking after tach
Must be a ground or power path through the tach lead, so I'm guessing that line is pinned wrong or somehow shorted?
Check continuity from your distributor to the back of the tach, and if that's good, check it to ground and power too (which it shouldn't be a direct path to).
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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02-17-2017, 01:37 PM
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#3 |
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Account Suspended
 Join Date: Jul 2016
Location: Tacoma, WA
Posts: 6,873
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Re: not cranking after tach
Tach wire hooked up to positive instead of negative side of coil.
Tach and distributor wires should be connected to negative on coil. |
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02-17-2017, 03:42 PM
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#4 |
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Registered User
Join Date: Apr 2013
Location: Houston,Tx
Posts: 790
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Re: not cranking after tach
I have the wire connected to the negative side of the dist..
__________________
1966 C10 "Mary" 1972 C10 Cheyenne "Betty" https://67-72chevytrucks.com/vboard/...d.php?t=847364 1979 C10 Silverado "The BIG TEN" https://67-72chevytrucks.com/vboard/...d.php?t=841339 C10 Club Texas -HMIC |
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