Gen V tach signal
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From: colo
Gen V tach signal
I have a 78 that I swapped a 2017 Gen V engine into. I purchased an aftermarket wiring harness from PSI. It doesn't have a connector for a tach signal, and their tech didn't know where to access one .. I am using an intellitronix digital cluster , so I called them to see if they may know. No luck !
I know others have done the swap, so I am hoping someone may know where/how to get a signal for it . The original engine picked up the signal from the positive side of the coil, but now I have 8 coil packs ,and 4 wires going into each one .
Any help/advice would help.
Ed
I know others have done the swap, so I am hoping someone may know where/how to get a signal for it . The original engine picked up the signal from the positive side of the coil, but now I have 8 coil packs ,and 4 wires going into each one .
Any help/advice would help.
Ed
Melting Slicks
Joined: Jul 2010
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From: perth western australia
I put a 2007 holden commodore LS2 in a Land Cruiser recently, the factory ECU has a separate output for tacho. that isn't used in the original car, it's just a single wire output and you have to get into the unit with a reader to enable it.
Then you would probably need a Dakota Digital convertor (or similar) to go between your cars tacho and the ecu output.
Then you would probably need a Dakota Digital convertor (or similar) to go between your cars tacho and the ecu output.
Racer
Joined: Jan 2016
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In stock form the pcm gets engine speed input from the crank sensor which then relays that info to the bcm to relay that info to the instrument cluster. It’s all done over a can bus network. Seems like Dakota digital should have way to piggyback off the crank sensor signal with out scewing the signal to the pcm.
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From: colo
The wiring harness I have has a VSS sensor plug-no crank sensor plug- and my ECM has 3 separate plugs . I will try and call Dakota Digital on Monday to see if they have anything that will work .
Thanks,
Ed
Thanks,
Ed
Melting Slicks
Joined: Jul 2010
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From: perth western australia
Racer
Joined: Nov 2013
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From: Uhrichsville Ohio
This is what we used for a 2012 LS3 in a 1969 Camaro. Check with them for your engine. JP https://static.speedwaymotors.com/pdf/9123.pdf https://www.summitracing.com/parts/atm-9123
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From: colo
I looked at the wiring diagram again and it does have a cam signal connector also. These new engines can be a real pain to get right. Carburetor engines are so much easier to work on , but hopefully this engine will be better in the long run. It definitely has more HP and better gas mileage (Hopefully ) .
Ed
Ed
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From: Uhrichsville Ohio
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From: colo
I just did a quick search about the STA-1000 adapter that plugs into the OBDII connector. One person said that due to that the tachometer was reading slow. Has anyone else had that issue ?. I like the convenience of plugging it in there , but I would like accuracy also.
Ed
Ed
Racer
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From: Uhrichsville Ohio
Says user adjustable. Call and ask. JP From website. NOTES: Late-Model Drivetrain integration has never been simpler! The STA-1000 plugs directly into the OBDII diagnostic connector, providing a user-adjustable traditional Speedometer, Tachometer and Check-Engine output for your choice of aftermarket instruments.
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From: colo
Maybe this. JP https://www.psiconversion.com/produc.../STA-1000.html
Thank you to all that replied , and once I hook it up I'll let everyone know.
Ed
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From: colo
I am using a ECU from a 2017 ? camaro that was tweaked by PSI conversion when I got the harness for the engine. Their solution is to use the sta-1000 also instead of possibly adapting the signal at the ECU..It includes an OBDII connector that I put directly under the steering column by the headlight bypass vacuum switch.