I have a Pfaff 1171. When I try to sew, the presser foot doesn't drop on it's own. I can move it with my fingers, but it won't do it on it own and there is no actual pressure.

SOURCE: Oil Pressure Drops While Driving

your oil pump is either weak or there is sludge i9n the oil pan. my adives is to have the oil pan dropped . chances are sludge is the culprit. as the oil get's warm the pressure should only drop slightly but pressure is generally dictated by engine rpm. pumps are gear driven so if it was a bad pump your oil pressure would start out very low at start up.

Mike Butler

• 6674 Answers
• Posted on Dec 12, 2008

SOURCE: 97 f-150 4.2 ltr - no oil pressure

First thing I'd do is hook -up an external gauge at sender spot & confirm if pressure there or not, or is the engine making sounds like it's obviously not getting any oil pressure?

SOURCE: no oil pressure at idle once motor warm

Re-new the engine oil and see if the problem persists.
Low oil pressure at idle is usually a sign of a worn motor - worn camshaft and crank bearings allowing excessive oil to pass.

Walker

• 146 Answers
• Posted on Dec 11, 2009

SOURCE: my speedo is going really slow, when i'm doing 30...

The speedometer is faulty and will need to be replaced. Only a Nissan dealer can change a speedometer head legally.

Terry Reimink

• 458 Answers
• Posted on Apr 11, 2011

SOURCE: my 1998 dodge ram 4x4 is dropping oil pressure, I

I'm assuming that pressure is at an engine speed of 1500 RPM or more. You could have excessive clearance in the main, rod and/or cam bearings. No easy way to check.