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Old 03-29-2010, 03:12 PM   #3
nrb's70gmc
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Join Date: Sep 2008
Location: magalia,ca
Posts: 366
Re: HEI Ignition Problem

Ok here it goes lol

1, battery is about 1 month old all connections are clean
2, the carb was bought new in 2002 (edelbrock)
3, the tank is full (the engine starts right up)
4, i use accel u-grove shorty plugs (bought and gapped in 2004)
5, yes i have a back up module and plan to swap/test it
6, no external ignition box
7, i just went out and was listing to it at idle (really rough/cutting out) i was revving it from the carb and it would cut out and sputter thoughout the diffrent rpm range.

like i said yesterday there were no signs of any problems--i think this is an ignition problem because i have had this happen before but i cant remember what was the cause but im really thinking it may be the module. but i dont know for sure.
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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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