Quote:
Originally Posted by zr1mom
Look for brittle vacuum hoses, lose connections, oil and dirt in the valley. Check the drain hole is clear.
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In general like
ZR1mom suggests

Compressed Air works great from below on the valley drain tube just to the rear of the oil pan on passenger side.
Now........get ready for some fun
Oh......drain some coolant first so when you remove the plenum the Throttle Body (TB) coolant is not getting into the Injector Housing. Or....here we go.....

Block the TB coolant when you are there
LT5 Eliminated Systems