When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
ok i attached a vac gauge and found at idle/neutral (manual tranny - '85 with 70K miles). at 149* rpm at 670-700 the vac showed was between 18-19 when hooked to the port marked in red
which at least on the gauge says "normal". I am not sure if that is or not - does any of that sound right?
Besides the # at idle you also are looking for a steady reading. Not bouncing around or fluttering or anything else . A vacuum gauge will tell you alot if you can read it.
If you image search for "vacuum gauge chart" you will see how that tool is very useful.
quick vacuum question
