Twitching Manifold pressure needles on C414

[Boeing_Driver 76]

Anyone have the issue on the Cessna 414 where the manifold and EGT gauge needles twitch at some time into the flight? Not sure what is causing it but it continues until I shut down the engines. I find it has a bout 100-150" of variance.

[reecemj 146]

This happens at high attitudes but don't know how to fix it.

[Echoes 6]

Yeah, I get it too.  And the fuel flow readings on the fuel computer go mental as well.

[Boeing_Driver 76]

8 hours ago, Echoes said:

Yeah, I get it too.  And the fuel flow readings on the fuel computer go mental as well.

This has been happening even after several updates. 

[Marc Collins 45]

Assuming that you're flying on PC, this behavior can be caused by having the "automixture" assistance option enabled. The turbocharger logic in the 414 conflicts with the MSFS automixture assistance. 

[Boeing_Driver 76]

9 minutes ago, Marc Collins said:

Assuming that you're flying on PC, this behavior can be caused by having the "automixture" assistance option enabled. The turbocharger logic in the 414 conflicts with the MSFS automixture assistance. 

Ah--good to know! I'll check into that.  ;o)

[Boeing_Driver 76]

On 1/3/2023 at 11:02 AM, Marc Collins said:

Assuming that you're flying on PC, this behavior can be caused by having the "automixture" assistance option enabled. The turbocharger logic in the 414 conflicts with the MSFS automixture assistance. 

Sorry for the dumb question but I can't find this option in Flight Model section--can someone direct me to where it is?

[af1134 9]

Hello,

You should join and ask your question on Flightsimware discord https://discord.gg/GnBawg6P

Franck

[ark 1,291]

1 hour ago, Boeing_Driver said:

Sorry for the dumb question but I can't find this option in Flight Model section--can someone direct me to where it is?

Automixture is under Options > Assistance Options > Aircraft Systems.

Al

 

 

Edited January 6, 2023 by ark