Quote:
Originally Posted by Demps
After all the above, if pump stops running by plugging hose near it & you don’t have a smoke machine just yet—pull & put your finger over the vacuum line going into driver’s side of the plenum (with key on and pump assumably running). Does the pump stop/intermittent?
Yes: [at a minimum] failed check valve under plenum. Temp solution: buy $7 check valve & hose to adapt at local auto parts & put inline at plenum hose connection until you can get under plenum.
No: see above comments—leak under plenum.
Ted
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Agreed. While leaks can be in many places. More often than not I’ve found the check valve to be bad. But do check the main line from the pump into the engine first. If the pump runs continuously you run the risk of burning it out. I’ve seen a bunch of those too.
Just to finish Demps train of thought above, if you put your finger over the vacuum line noted above and the pump does not stop you have a vacuum leak in one of the lines or components under the plenum (other than or even in addition to the check valve) Hope that makes sense.
H
