MSefi.com read only forum (Jan.15,2018)

Well,, thanks for the help. I'll check back in later if I am still having the problem after I figure out why the No 2 cylinder was full of coolant on my new rebuild. Hopefully it's just the intake gasket...

I changed the input using those guidelines and it still gets the same tach dropouts, unless I disconnect the timing override plug. When it's disconnected, I don't get any dropouts.

Like this.

V3.0 main board:
DB37 pin #36 to the E pin on the HEI module
DB37 pin #24 to the R pin on the HEI module
On the V3.0 main board:
use the 'Hall sensor circuit' (step #50 in the assembly guide),
jumper OPTOIN to TACHSELECT on the bottom side of the PCB, near the DB37 connector, opposite ...

The input circuit on the V3 is set up like the megamanual says to set it up.

I have a MSII/V3 running a SBC 383 with TPI in a 1977 Blazer. It was previously running fairly well (about 2 years ago before I overheated the engine). After a fresh rebuild of the engine and rewire of the chassis, I can't get it to idle without an irregular miss. This seems to be related to ...