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Old 04-05-2010, 04:57 PM   #99
nrb's70gmc
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Join Date: Sep 2008
Location: magalia,ca
Posts: 366
Re: HEI Ignition Problem

Quote:
Originally Posted by mdwilf View Post
Could be the vacuum advance - take the cap off & if you don't have a vacuum tester, just put a hose on the vac adv & suck on it - you should see things move inside. If not, it's bad.
i blowed and sucked on the line and i could hear things moving
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1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)
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