Howdy,
How can I hookup an aftermarket tach to the tach output on the L67 PCM? Is it just as simple and wire in and go or do I need a converter box or something?
Thanks,
Howdy,
How can I hookup an aftermarket tach to the tach output on the L67 PCM? Is it just as simple and wire in and go or do I need a converter box or something?
Thanks,
Central TEXAS Sleeper
Experimental Physicist
Current:
1964 Riviera (4.1L Buick Turbo6, 4L80E, L67 PCM)
2012 Hyundai Genesis Sedan (3.8 GDI, 8spd Aisin)
1998 Chevrolet Suburban K2500 (454, 4L80E)
SOLD:
1970 Riviera
1965 Riviera GS (465 Super Wildcat, SP400) #'s Matching
1967 Skylark Deluxe
1997.5 Regal GS
Should be able to, but you would use the white wire on the ign module, not the PCM. There isn't a tach output on the PCM. The PCM doesn't get an actual tach signal you could use, just cam and crank sensor signals that are passed to it through the ign. module.
-Eddie
1998 GTP - 3.4 [3.2] [3.0] MPS - custom CAI - F.1 Ram Air hood - XP Cam - Ported Heads - 1.84/1.60 Si valves - 1.6 HS Roller Rockers - 72mm Ported TB - LQ4 MAF - 42.5# Lucas Injectors - Pacesetters
1/4 PB - 13.025 @ 106.81 MPH w/ 2.069 60'
2021 Chevrolet Colorado 2.8 Baby Duramax
couldnt you run a signal cable from the alternator... i once heard my dad talkin to his apprentice about this... think its the W terminal that can be found on some alternators - correct me if im wrong
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