Re: engine problems: Vaccum too high...

[SailingFC@aol.com]

Wing,
Yes, a healthy motor at idle should be between 15 and 20 inHg.

Things to check:  Vacuum leaks, Valve timing, ignition timing, compression.

One way to check for vacuum leaks is to spray some water around all the parts 
and hoses on the intake system.  This would include the brake booster.  If 
you hear a change in idle, you may have located your leak.  Use a spray 
bottle not the garden hose.

The valve timing is the usual, V notch and dot on the lower pulleys and the 
dot to head at the cam.  Late valve timing will cause a low vacuum reading.

Ignition timing is ignition timing.  Late ignition timing will cause a low 
vacuum.

Compression will show if your rings are good or not.  Low compression numbers 
will give low vacuum numbers.

I'm assuming your not getting a rapidly bouncing vacuum needle.  This means 
you may have a burned of misadjusted valve.

GL.

-Dick-
78 Scirocco
Original Owner
http://member.aol.com/sailingfc/


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In a message dated 8/2/01 10:15:33 PM Pacific Daylight Time, 
winggee@Hotmail.com writes:


i've been trying to figure out why my car is hesitating when i step on it. i
checked the vaccum and i'm only getting 12Hg or so at 1000rpm.. i'm suppose
to be at around 18-20 right? i swear i can't find any leaks.... could my
motor be toast... like rings are gone?

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