When using TPS signal and disconnected MAP sensor, car dies

[lovemyrsx]

Hi. I have ITBs and tuned with only modified TPS signal (Alpha-N). When I disconnect the MAP sensor, the car starts up and drives around fine for a little bit. After five minutes or so, the car dies in the middle of driving. For example, I could be at 3000 RPMs on the freeway and the engine just dies.

Is there a correlation between why a TPS only tuned car with a disconnected (or perhaps deleted) MAP sensor would die? I just figured if my car is tuned by TPS only, it would be safe to disconnect the MAP sensor. Is there some signal that K-Pro needs from the MAP sensor even when it is tuned by only TPS?

Thanks!

[Hondata]

The MAP sensor mush be connected and reading manifold vacuum, even when using ITBs.

[lovemyrsx]

Thanks for the quick reply! Yeah, my car died on the freeway so I learned it the hard way. :)

Unfortunately, I don't have the stock MAP sensor anymore. So on the freeway shoulder, I figured I would try to plugging in the OEM MAP wires into my AEM MAP/pressure sensor. The car drove fine after that, at least for 15 miles.

If I'm tuned with modified TPS signal, can I use an aftermarket MAP sensor? In Parameters/MAP, I see the option to use stock, replacement, or TPS.

[Hondata]

Yes, you can use an aftermarket MAP sensor, but it must read manifold vacuum.

[lovemyrsx]

Got it. Thanks!