gsxr - thanks i'll let you know what transpired once i get the cover off and or the ALDA off ... these mysteries once solved can be a help to one and all.

thanks again

Did you ever solve this issue. I have noticed the exact symptoms on my 91 300D 2.5

Take the oil filler cap off and observe the shutoff lever. Or when the shutoff is randomly moving loosen the filler cap off to see if the condition is still present.

Hello,

If you are reffering to the stop lever oscilatiing - then the fault was found to be an improperly mounted / installed shutoff valve. The barrel shaped tange on the arm of the shutoff valve must be seated properly not on top of the arm ( which causes the oscilation symptom ) and NOT underneath ( this will cause runaway - and engine will blow if not arrested) but rather in between there is an intended slot.
Hope this helps.
Happy Holidays to All

Fascinating thread. I believe I have the same symptoms. Did mounting the shutoff valve lever properly alleviate the lack of power symptoms??

Thanks!


Josh

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Cantabridgian

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1987 300TD Black/Palomino 120k on donor engine (thank you CS), 305k on everything else

MISSED 1985 300CD Blue/Palomino 250k lovely but had to part with it; now wife has Jetta TDI, you know how it goes

It has been some time but I believe I remember it was helpful but not the full cause of power loss... I found that I had a loose clamp on the rubber boot just outside the air filter housing shich reduced the suction power necessary to open the air flap in the air filter housing ...this was one issue and if you have done the wastegate mod then you do not need that flap to operate as in factory spec so just pull the plastic cover off the air mass sensor ( air filter body ) and reseat the spring retainer inside to remove the spring load on the flap thereby keeping the flap open and allowing full air flow for the engine... this was really the single biggest help toward returning the power...but all in all though it is very fuctional it has never returned to the awsome power it once had...
best