Ok so the IPC from a v6 truck Reads the cam sensor differently or gets a different signal from the v6 vs v8 if I’m correct. is there a way or place to change the way the vehicle reads this to correct rpm output on cluster in HP tuners?

Seems like it’s off with a multiplier so it gets exponentially worse the higher the RPM.

Thabks in advance

 

maybe a tach adapter?

 

You could try using EFILIVE or HPTUNERS to swap the segments to the closest thing that matches your configuration. I bet that would fix it.

There are segments for the engine, system, speedo, fuel, and misc IIRC.

 

I believe the cluster tach uses the PCM tach output, which can be configured in the tune. It is likely off because the output is configured for a 6 cylinder, and it needs to be 8. Should just need to change high and low pulses to 3 and 3. That will be an 8 cyl tach output.

 

Thank you so much lastcall. My pulses were at 6 and 6 and changing them to 3 and 3 made the problem twice as bad. 8 and 8 was what made it dead on for my truck at least. Thank you for the tip.

 

Cool, glad you got it figured out!