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The tach is electronic. It connected to the negative side of the coil.

From what I've been reading the input is not sensitive enough to properly read the output of the 411 pcm without a pullup...

I'm configuring my PCM for use in a 69 camaro. I'm starting with a 2003 corvette 6 speed calibration.

I want to use the stock tach. Seems like I set the tach output resolution high and low to 3...

I changed the tires from a 245/70 16 to 265/70 on my 2003 4wd suburban. With the Tech 2 I changed the tire size in the EBCM to the correct size. HP tuners is needed for the speedo.

From what I've gathered from reading the service manuals, yes the pressure sensor is needed.

The PCM and pressure sensor together act like the trinary switch with the added benifit of taking road...

thanks for the info.

I will be using a 2002 Corvette Z06 VIN to get the base cal in my PCM. Seems that I need to make sure the VIN has manual AC instead of the serial.


So the answer is it...

Want to integrate 12200411 PCM control of the AC compressor with my vintage air system. The VA system provides ground for the relay coil. Looking at the wiring diagram for a 2002 Corvette it looks...

On when the throttle is closed is the opposite of what I need, but thats easy enough to change with a relay. Thanks for the info!

Fritz from Denver Co

Working on a 69 Camaro with a 540 BBC with p30 van cam and crank sensors. EFI manifold is a Edelbrock pro-flo XT. Will use a Nick Williams 102mm TB. Goal is a high-tech old...

Maybe a dumb question...

Working on a 24x conversion on a BBC in a 69 Camaro. Engine will use electronic throttle on a Edelbrock Pro Flo XT. I have a 411 PCM with 2003 Corvette manual trans as the...