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lucittm lucittm is offline
Manassas, VA
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Join Date: Apr 2007
Posts: 1,211
Sand_man's idea is good but the scavenge pump is a rotary gear pump and should not produce a "tic" sound.

I would do a compression test on the offending side, it is very easy to do. Remove the coil wire. Pull all the plugs on the driver's side and turn the engine over for 10 seconds with the gauge hose in each successive spark plug hole.

If the pressures are all within +/- 5 PSI, then you almost have to do a tear down to learn the source of the unusual sound.
If one of the cylinders is low, then you may have a partially stuck (bent? dirty?) valve. Then a leakdown test will point to the intake or exhaust.

As an alternative to mechanical investigation, try Sea-Foam or Berryman's fuel system cleaner. It costs about $5 and after a half a tank of gas, you would know if it is deposit related. As a bonus, it would clean all the gook out of your fuel system. And you are about to dump your oil anyway...

Good Luck,
1991 964 Polar Silver Metallic Turbo Coupe

Last edited by lucittm; 10-26-2008 at 06:19 PM..
Old 10-04-2008, 05:45 AM
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