after looking through the IP help link posts i cant seem to find this problem ..
I have a 74 240D w115-114 w/ 4 speed manual , currently removing the engine to rebuild it . because it has ultra low compression . like 140lbs

But when it was running it would blow horrible white smoke ,
and it seems the IP is running full open all the time .
the throttle plate seems to be limiting the cars RPMs , like in a gas engine .
but i disconnected the control rod to the ip and pulling it up and down make no difference how the engine runs
...
does anyone know what is causing this or and advise on how to take apart that back 1/2 of the Ip ?

as stated i am doing a full rebuild so it will be all apart this week .. but Ips are kinda something i dont know much about the internals .

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current fleet
Ford f350 dully 7.3L 1990 . ats turbo , zf5
Mazda 4x4 b2600 with 617 20-26 mpg
Past fleet
1983 240D w123 232k 25-30 MPG
1984 Ford f250,1979 ford 150 300-6 (sold@ 251K )
81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords

Custom machine shop work ..