V8 quattro stuck throttle
#11
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Location: Nebraska
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Here's what it was: the bearings on which the throttle butterfly valves sit, and their spring return mechanism, were sticky to an extent you would scarcely believe. presumably as a result of being left in one position for months. Penetrating oil plus a good deal of effort with the hands freed it all up. The rod mechanism that seems so implausible was functioning fine. The whole job need only have taken an hour or so for an able-bodied person.
#12
My throttle stuck wide open today and bounced on the 7000 rpm rev limiter. I fixed it with your advice! thanks! I took pictures of the stuck parts and circled them in green. I used PB Blaster and wiggled it until it broke loose. Had to take out 6bolts and disconnect one hose to get to the butterfly valves on the front of the intake.
#14
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My throttle is still working perfect. Not sticky at all.
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