Stock idle vacuum question
#1
Stock idle vacuum question
I recently installed a boost gauge in my 1.8T. From what I understand, the vacuum should be somewhere around -20 when the car is idling. Mine seems to sit at about -11, when idling and even when cruising.
Does this indicate a a vacuum leak somewhere? I do seem to get close to the stock 7-8 psi when I'm WOT in 4-5 gear, but the fact that my idle seems low has me wondering...
Does this indicate a a vacuum leak somewhere? I do seem to get close to the stock 7-8 psi when I'm WOT in 4-5 gear, but the fact that my idle seems low has me wondering...
#3
Yeah that seemed to be the issue. I was replacing my DV valve anyways so I went ahead and replaced all the small braided vac lines. After putting everything back together it holds at about -22 when idling and -25/-26 when cruising. Granted, I'm not sure how accurate a mechanical gauge is but does this seem better? Or I may still have a small leak somewhere?
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