Quote:
Originally Posted by geeteeohguy
It could be a vacuum modulator, but it would smoke at idle, too, when the vacuum is the highest. More likely it's worn intake valve guides or seals, which causes oil to be sucked into the combustion chamber only on de-cel due to high vacuum at that time. Thec the modulator first---if not that, probably worn/tired guides/seals. Not a huge issue.
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This isn't necessarily true. The vacuum is higher on decel than at idle. The modulator is a diaphragm and can seal pretty well if it's at rest. High vacuum can cause it to separate and allow ATF to be pulled through it.
The test for it is simple. Pull the hose and stick a Q-tip in the tube and wipe it around. If you get any oil on the cotton, at all, replace the modulator.
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