I may just may of discovered the problem. I did an event viewer to see what was going on in P3d when it crashed. It seems like a file named MV_F-4J_Sys.dll (in the gauges folder)
may be causing the problem- At least for me. I renamed the file with a different extension and then tried it and after a few times of getting it to work in P3d it seems to be more stable.
I did note that the nose gear will not swivel left/right in a turn. It stays locked up in a forward position but the plane will still steer left/right.
I've posted all this over at Milviz; waiting for a comment from anyone over there.
They did ask me to look in my Windows event viewer to see what was causing P3d to crash when I loaded one of their F4's.
For some reason, the gauge file MV_F-4J_Sys.dll came up in the error message, so I got the notion to just disable it and try, what could I lose as it caused P3d to crash anyway,
So, for now with that one gauge file nutralized it works.
Log Name: Application
Source: Application Error
Date: 3/31/2017 3:16:36 PM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: ijdjr-PC
Description:
Faulting application name: Prepar3D.exe, version: 3.4.22.19868, time stamp: 0x588f7cbf
Faulting module name: MV_F-4J_Sys.dll, version: 1.4.0.8, time stamp: 0x5831d5de
Exception code: 0xc0000005
Fault offset: 0x0002c64f
Faulting process id: 0x19e4
Faulting application start time: 0x01d2aa5b668533fe
Faulting application path: P:\Program Files (x86)\Lockheed Martin\Prepar3D v3\Prepar3D.exe
Faulting module path: P:\Program Files (x86)\Lockheed Martin\Prepar3D v3\Gauges\MV_F-4J_Sys.dll <<<< I think this was the culprit.
Report Id: f079b480-164e-11e7-a478-6cf0497dce43
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2017-03-31T20:16:36.000000000Z" />
<EventRecordID>242712</EventRecordID>
<Channel>Application</Channel>
<Computer>ijdjr-PC</Computer>
<Security />