All new parts and still burning ign modules.. what else to check - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**hatzie** · 04-25-2016, 11:26 AM

Set your meter on AC Volts and check the battery voltage with the engine running. A bad alternator diode will dump AC into the system and the module won't like that.

NO AC? set the meter on DC volts and check that you have no more than 14.5V DC and the voltage is steady when you throttle up.

Are the new parts cheap Chinese electronics or AC Delco Professional grade parts?
Chinese Ignition coils, Pickup coils, Reluctors, and Ignition modules are complete garbage. You'll continue to have failures till you put in decent components. Maybe not this extreme but they are not long life components.

Cheap Chinese ignition coils and pickup parts will kill Delco ignition modules pretty quick too... so don't just put in a Delco module and assume the problem will go away.

04-25-2016, 11:26 AM	#13
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,941	Re: All new parts and still burning ign modules.. what else to check Set your meter on AC Volts and check the battery voltage with the engine running. A bad alternator diode will dump AC into the system and the module won't like that. NO AC? set the meter on DC volts and check that you have no more than 14.5V DC and the voltage is steady when you throttle up. Are the new parts cheap Chinese electronics or AC Delco Professional grade parts? Chinese Ignition coils, Pickup coils, Reluctors, and Ignition modules are complete garbage. You'll continue to have failures till you put in decent components. Maybe not this extreme but they are not long life components. Cheap Chinese ignition coils and pickup parts will kill Delco ignition modules pretty quick too... so don't just put in a Delco module and assume the problem will go away. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 04-25-2016 at 11:37 AM.



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