Quote:
Originally Posted by gabedrummin
So vacuum test shows 21 Hg of vacuum , needle is not moving even when revving the engine needle dose not move .
|
Your pulling good vacuum so it does not look like you have any vacuum issues.
Steady needle is good
When you do a snap throttle test the needle should drop to near zero then rebound a little above your idle vacuum then settle at idle vacuum.
Here is a site that you can go to and read up on vacuum testing.
It will be better that a back and forth here on the forum.
what-when-how.com/automobile/engine-vacuum-test
That article should help you out some.
sounds like your valve train is ok but do further vacuum tests (described in the article) to prove that out.
A compression test would remove any doubt.
If it is not a mechanical issue (valve train) I would start looking at fueling.
Fuel pressure and volume tests and also the injectors for leaks.
keep us in the loop
