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Discussion Starter · #1 ·
Its an 87' Caprice with a 305 HEI ignition system. the car starts, but when i step on the accelarator it starts to run real rough and very lightly misfires...all this at idle....i checked the ECM for any codes and it gave me a CODE 41

....No Distributor Referance Pulse....

what does that mean, or anyone know what it can be, i have a feeling its the HEI ignition coil but wanted to know if anyone knew the exact meaning of that code...

need info ASAP..

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